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Preview 2 platforms
iPhone 6 images
iPad 5 images
What’s New Version 3.6
80% reduction in file size to 35MB. Full support for latest iPad Pro 4th Generation.
Description
KEY FEATURES:
- Essential tool for your iPhone & iPad.
- Test the GPS module.
- Fast GPS lock time.
- Precise navigation parameters.
- Supplements operation of your navigation apps.
- GPS "JumpStart" technology.
- If location cannot be determined then it diagnoses why.
- Assists you in changing conditions to get a reliable location.
- GPS, Galileo, GLONASS, QZSS full support.
- Latitude & Longitude, and WGS84 included by default.
- In-App Purchase: USNG, MGRS, UTM, OSNG, GEOREF, GARS & 174 Datums (free basic functionality).
- **NEW** Smaller footprint (now only 35MBytes)
- Free technical and customer support by email.
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OVERVIEW:
- Lodestone Chart™ displays all essential GPS satellite information using a chart with only 4 bars. This dramatically simplifies the diagnostic process (Registered Copyright).
- GPS "JumpStart" technology may resolve GPS problems with third-party navigation applications that have a frozen location, are slow to respond or are performing inaccurately.
- Uses the internal GPS of your iPhone or iPad.
- Includes a Speedometer, Altimeter and Compass.
- Location and altitude ( best-in-class accuracy and reliability )
- Speed (SOG) and Course (COG).
- Heading (i.e. Compass) with ability to turn on and off the manual compass calibration.
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IN-APP PURCHASE (IAP) = "COORDINATES-PRO"
This adds additional coordinate systems and datums to the app to let you accurately work with many paper maps and charts used by civilians, U.S. military and NATO forces for walking, sailing, and flying. The coordinate systems and datums included are:
- United States National Grid (USNG)
- Military Grid Reference System (MGRS) -Old and New
- Universal Transverse Mercator (UTM)
- Ordnance Survey National Grid (OSNG) for Great Britain
- World Geographic Reference System (GEOREF)
- Global Area Reference System (GARS)
- 174 Datums (e.g. WGS84, NAD83, NAD27, WGS72, ED50, ED79, OSGB36 etc....).
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REVIEWS:
- The developer is a professional software and hardware engineer working in the satellite space industry. He is a yachtmaster and pilot with a passion for navigation and Apple products.
- Consistent 5 star reviews, see what users are saying:
"Perfect Diagnostic Tool - This is the best app if you need to know the actual status of the internal GPS."
"Great app for kick starting navigation apps - This app finds a position every time and then all other nav apps work."
"Excellent application - This was a much needed application for iOS devices."
“I love the app. It’s been great to have when buying a new phone from eBay to check that the GPS is working. I had to return 3 phones last time before I got one with operational GPS.”
"Awesome, over used term but this app is - This app does what other developers said they could not do."
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MORE INFORMATION:
- Hardware information
- Accuracy of measurements shown for pro users.
- Imperial, metric and nautical units. These are the most commonly used and most useful navigation units. All easily changeable from the screen in use.
- Does not require internet access and does not use cellular data.
- Essential tool for any power user.
(e.g. navigators, yachtsmen, pilots, app developers)
- Share your location by text message, email etc. The format contains all essential information for improved accuracy.
- Works with Garmin Glo.
- GPS Diagnostic™ is a professional GPS test and measurement utility for your iPhone and iPad.
In-App Purchases US pricing
One-Time Purchases
Coordinates-Pro$0.00
Capabilities
In-App Purchases
Accessibility
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Version history 20 versions
Build 836007266v3.62020-06-25 16:17:48
80% reduction in file size to 35MB. Full support for latest iPad Pro 4th Generation.
Build 835946167v3.52020-05-17 09:54:55
Universal Transverse Mercator (UTM) coordinate system added.
Build 834018836v3.42020-05-04 10:56:37
User display improvements. Support for iPhone SE2 and older iPhones and iPads running iOS8 and iOS9.
Build 833660476v3.32019-12-09 16:46:39
Update to support latest iPhones and iPads: iPhone 11 / 11 Pro / 11 Pro Max and iPad mini 5th Gen/iPad 9.7 inch 7th Gen/iPad Air 3rd Gen.
Build 830103192v3.22019-02-04 17:37:30
Support for iPhone XS, XS Max, XR and latest iPad versions.
Build 824242050v3.12017-11-02 20:44:22
Application file size reduced by 50%.
Build 823289779v3.02017-11-01 08:10:08
Additional Coordinate Systems and Datums added as an In-App Purchase.
Lodestone Chart Algorithm update.
Compatibility update for new iPhones 8 and X.
Build 822961220v2.92017-07-21 08:10:41
Support for new iPad Pro 10.5" models.
Build 820425811v2.82017-01-10 23:25:37
- Chinese added.
Build 820242723v2.72016-12-22 17:24:13
- Russian added.
- Facebook app sharing and like button added.
Build 819972842v2.62016-12-03 17:44:05
iPhone 7 and 7 Plus compatible.
Build 817489973v2.52016-11-29 18:27:37
- Minor bug fix
- Minor improvements.
Build 817319249v2.42016-05-20 21:06:25
Share button on iPad is now functioning.
Build 817258324v2.32016-05-03 21:16:45
User interface & hardware detection optimization.
Build 816507799v2.22016-05-01 22:26:34
Universal version optimised for both iPad and iPhone.
Build 815618995v2.12016-01-10 00:57:12
User Interface Update.
Build 815323122v2.02015-12-16 23:37:56
Satellite bar chart added.
Build 814728043v1.22015-11-24 23:52:15
'Email Developer' feature added.
Build 814323762v1.12015-11-13 02:58:23
Improvement to user interface (GUI)
Build 812892021v1.02015-09-08 22:28:20
Price history by region
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App performance US
Availability 173 of 173 storefronts
| Region | Language | Price | Ratings | Avg | Version |
|---|---|---|---|---|---|
US | en-US | USD 2.99 | 545 | 4.7 | 3.6 |
DE | de-DE | EUR 2.99 | 158 | 4.5 | 3.6 |
GB | en-GB | GBP 2.99 | 129 | 4.7 | 3.6 |
CN | zh-Hans-CN | CNY 22 | 76 | 4.0 | 3.6 |
FR | fr-FR | EUR 2.99 | 69 | 4.7 | 3.6 |
CH | de-CH | CHF 3 | 56 | 4.6 | 3.6 |
RU | ru | RUB 249 | 52 | 3.8 | 3.6 |
AU | en-AU | AUD 4.99 | 50 | 4.5 | 3.6 |
CA | en-CA | CAD 3.99 | 45 | 4.4 | 3.6 |
NL | nl | EUR 2.99 | 38 | 4.1 | 3.6 |
IT | it | EUR 2.99 | 27 | 4.5 | 3.6 |
KR | ko | KRW 4400 | 23 | 4.6 | 3.6 |
SE | sv | SEK 39 | 21 | 4.2 | 3.6 |
TH | en-GB | THB 99 | 20 | 4.7 | 3.6 |
TW | zh-Hant-TW | TWD 90 | 20 | 4.7 | 3.6 |
AT | de-DE | EUR 2.99 | 19 | 4.8 | 3.6 |
PL | en-GB | PLN 14.99 | 18 | 4.8 | 3.6 |
BE | en-GB | EUR 2.99 | 16 | 4.3 | 3.6 |
BR | pt-BR | BRL 19.9 | 15 | 4.1 | 3.6 |
IL | en-GB | ILS 9.9 | 15 | 4.6 | 3.6 |
JP | ja | JPY 500 | 15 | 3.9 | 3.6 |
ES | es-ES | EUR 2.99 | 14 | 3.8 | 3.6 |
HU | en-GB | HUF 1490 | 11 | 4.5 | 3.6 |
DK | en-GB | DKK 29 | 10 | 3.4 | 3.6 |
MX | es-MX | MXN 69 | 10 | 4.6 | 3.6 |
PT | pt-PT | EUR 2.99 | 8 | 3.4 | 3.6 |
CZ | en-GB | CZK 79 | 7 | 4.6 | 3.6 |
EC | es-MX | USD 2.99 | 7 | 5.0 | 3.6 |
HK | zh-Hant-HK | HKD 22 | 7 | 4.7 | 3.6 |
NO | en-GB | NOK 39 | 7 | 4.0 | 3.6 |
UA | en-GB | USD 3.99 | 7 | 4.4 | 3.6 |
ZA | en-GB | ZAR 59.99 | 7 | 4.3 | 3.6 |
AR | es-MX | USD 2.99 | 6 | 4.8 | 3.6 |
BG | en-GB | EUR 2.99 | 6 | 5.0 | 3.6 |
IN | en-GB | INR 299 | 6 | 3.7 | 3.6 |
NZ | en-AU | NZD 4.99 | 6 | 4.8 | 3.6 |
SI | en-GB | EUR 2.99 | 6 | 4.0 | 3.6 |
CL | es-MX | CLP 2990 | 5 | 4.2 | 3.6 |
GR | en-GB | EUR 2.99 | 5 | 4.4 | 3.6 |
LU | en-GB | EUR 2.99 | 5 | 4.4 | 3.6 |
MY | en-GB | MYR 14.9 | 5 | 5.0 | 3.6 |
RO | en-GB | RON 14.99 | 5 | 4.6 | 3.6 |
SG | en-GB | SGD 3.98 | 4 | 4.5 | 3.6 |
CO | es-MX | COP 14900 | 3 | 5.0 | 3.6 |
FI | en-GB | EUR 2.99 | 3 | 3.7 | 3.6 |
IE | en-GB | EUR 2.99 | 3 | 4.7 | 3.6 |
LV | en-GB | EUR 2.99 | 3 | 4.3 | 3.6 |
UY | en-GB | USD 2.99 | 3 | 4.0 | 3.6 |
VN | en-GB | VND 99000 | 3 | 5.0 | 3.6 |
BY | en-GB | USD 3.99 | 2 | 5.0 | 3.6 |
ID | en-GB | IDR 49000 | 2 | 5.0 | 3.6 |
PE | es-MX | PEN 12.9 | 2 | 5.0 | 3.6 |
SK | en-GB | EUR 2.99 | 2 | 5.0 | 3.6 |
TR | en-GB | TRY 149.99 | 2 | 5.0 | 3.6 |
CR | es-MX | USD 2.99 | 1 | 1.0 | 3.6 |
DO | es-MX | USD 2.99 | 1 | 4.0 | 3.6 |
EG | en-GB | EGP 149.99 | 1 | 5.0 | 3.6 |
GT | es-MX | USD 2.99 | 1 | 5.0 | 3.6 |
HN | es-MX | USD 2.99 | 1 | 4.0 | 3.6 |
HR | en-GB | EUR 2.99 | 1 | 1.0 | 3.6 |
JO | en-GB | USD 2.99 | 1 | 5.0 | 3.6 |
KH | en-GB | USD 2.99 | 1 | 5.0 | 3.6 |
KZ | en-GB | KZT 1790 | 1 | 5.0 | 3.6 |
LB | en-GB | USD 2.99 | 1 | 5.0 | 3.6 |
LT | en-GB | EUR 2.99 | 1 | 5.0 | 3.6 |
MT | en-GB | EUR 2.99 | 1 | 5.0 | 3.6 |
PA | es-MX | USD 2.99 | 1 | 5.0 | 3.6 |
PH | en-GB | PHP 199 | 1 | 5.0 | 3.6 |
QA | en-GB | QAR 9.99 | 1 | 5.0 | 3.6 |
SA | en-GB | SAR 12.99 | 1 | 5.0 | 3.6 |
TZ | en-GB | TZS 9900 | 1 | 4.0 | 3.6 |
AE | en-GB | AED 12.99 | 0 | — | 3.6 |
AF | en-GB | USD 2.99 | 0 | — | 3.6 |
AG | en-GB | USD 2.99 | 0 | — | 3.6 |
AI | en-GB | USD 2.99 | 0 | — | 3.6 |
AL | en-GB | USD 3.99 | 0 | — | 3.6 |
AM | en-GB | USD 3.99 | 0 | — | 3.6 |
AO | en-GB | USD 2.99 | 0 | — | 3.6 |
AZ | en-GB | USD 3.99 | 0 | — | 3.6 |
BA | en-GB | EUR 2.99 | 0 | — | 3.6 |
BB | en-GB | USD 3.99 | 0 | — | 3.6 |
BF | en-GB | USD 2.99 | 0 | — | 3.6 |
BH | en-GB | USD 2.99 | 0 | — | 3.6 |
BJ | en-GB | USD 3.99 | 0 | — | 3.6 |
BM | en-GB | USD 2.99 | 0 | — | 3.6 |
BO | es-MX | USD 2.99 | 0 | — | 3.6 |
BS | en-GB | USD 2.99 | 0 | — | 3.6 |
BT | en-GB | USD 2.99 | 0 | — | 3.6 |
BW | en-GB | USD 2.99 | 0 | — | 3.6 |
BZ | en-GB | USD 2.99 | 0 | — | 3.6 |
CD | en-GB | USD 2.99 | 0 | — | 3.6 |
CG | en-GB | USD 2.99 | 0 | — | 3.6 |
CI | fr-FR | USD 3.99 | 0 | — | 3.6 |
CM | fr-FR | USD 3.99 | 0 | — | 3.6 |
CV | en-GB | USD 2.99 | 0 | — | 3.6 |
CY | en-GB | EUR 2.99 | 0 | — | 3.6 |
DM | en-GB | USD 2.99 | 0 | — | 3.6 |
DZ | en-GB | USD 2.99 | 0 | — | 3.6 |
EE | en-GB | EUR 2.99 | 0 | — | 3.6 |
FJ | en-GB | USD 2.99 | 0 | — | 3.6 |
FM | en-GB | USD 2.99 | 0 | — | 3.6 |
GA | fr-FR | USD 2.99 | 0 | — | 3.6 |
GD | en-GB | USD 2.99 | 0 | — | 3.6 |
GE | en-GB | USD 3.99 | 0 | — | 3.6 |
GH | en-GB | USD 3.99 | 0 | — | 3.6 |
GM | en-GB | USD 2.99 | 0 | — | 3.6 |
GW | en-GB | USD 2.99 | 0 | — | 3.6 |
GY | en-GB | USD 2.99 | 0 | — | 3.6 |
IQ | en-GB | USD 2.99 | 0 | — | 3.6 |
IS | en-GB | USD 3.99 | 0 | — | 3.6 |
JM | en-GB | USD 2.99 | 0 | — | 3.6 |
KE | en-GB | USD 3.99 | 0 | — | 3.6 |
KG | en-GB | USD 2.99 | 0 | — | 3.6 |
KN | en-GB | USD 2.99 | 0 | — | 3.6 |
KW | en-GB | USD 2.99 | 0 | — | 3.6 |
KY | en-GB | USD 2.99 | 0 | — | 3.6 |
LA | en-GB | USD 2.99 | 0 | — | 3.6 |
LC | en-GB | USD 2.99 | 0 | — | 3.6 |
LK | en-GB | USD 2.99 | 0 | — | 3.6 |
LR | en-GB | USD 2.99 | 0 | — | 3.6 |
LY | en-GB | USD 2.99 | 0 | — | 3.6 |
MA | en-GB | USD 2.99 | 0 | — | 3.6 |
MD | en-GB | USD 3.99 | 0 | — | 3.6 |
ME | en-GB | EUR 2.99 | 0 | — | 3.6 |
MG | en-GB | USD 2.99 | 0 | — | 3.6 |
MK | en-GB | USD 2.99 | 0 | — | 3.6 |
ML | en-GB | USD 2.99 | 0 | — | 3.6 |
MM | en-GB | USD 2.99 | 0 | — | 3.6 |
MN | en-GB | USD 2.99 | 0 | — | 3.6 |
MO | zh-Hant-HK | USD 2.99 | 0 | — | 3.6 |
MR | en-GB | USD 2.99 | 0 | — | 3.6 |
MS | en-GB | USD 2.99 | 0 | — | 3.6 |
MU | en-GB | USD 3.99 | 0 | — | 3.6 |
MV | en-GB | USD 2.99 | 0 | — | 3.6 |
MW | en-GB | USD 2.99 | 0 | — | 3.6 |
MZ | en-GB | USD 2.99 | 0 | — | 3.6 |
NA | en-GB | USD 2.99 | 0 | — | 3.6 |
NE | en-GB | USD 2.99 | 0 | — | 3.6 |
NG | en-GB | NGN 4900 | 0 | — | 3.6 |
NI | es-MX | USD 2.99 | 0 | — | 3.6 |
NP | en-GB | USD 3.99 | 0 | — | 3.6 |
NR | en-GB | USD 2.99 | 0 | — | 3.6 |
OM | en-GB | USD 2.99 | 0 | — | 3.6 |
PG | en-GB | USD 2.99 | 0 | — | 3.6 |
PK | en-GB | PKR 900 | 0 | — | 3.6 |
PW | en-GB | USD 2.99 | 0 | — | 3.6 |
PY | es-MX | USD 2.99 | 0 | — | 3.6 |
RS | en-GB | EUR 2.99 | 0 | — | 3.6 |
RW | en-GB | USD 2.99 | 0 | — | 3.6 |
SB | en-GB | USD 2.99 | 0 | — | 3.6 |
SC | en-GB | USD 2.99 | 0 | — | 3.6 |
SL | en-GB | USD 2.99 | 0 | — | 3.6 |
SN | en-GB | USD 3.99 | 0 | — | 3.6 |
SR | en-GB | USD 2.99 | 0 | — | 3.6 |
ST | en-GB | USD 2.99 | 0 | — | 3.6 |
SV | es-MX | USD 2.99 | 0 | — | 3.6 |
SZ | en-GB | USD 2.99 | 0 | — | 3.6 |
TC | en-GB | USD 2.99 | 0 | — | 3.6 |
TD | en-GB | USD 2.99 | 0 | — | 3.6 |
TJ | en-GB | USD 2.99 | 0 | — | 3.6 |
TM | en-GB | USD 2.99 | 0 | — | 3.6 |
TN | en-GB | USD 2.99 | 0 | — | 3.6 |
TO | en-GB | USD 2.99 | 0 | — | 3.6 |
TT | en-GB | USD 2.99 | 0 | — | 3.6 |
UG | en-GB | USD 3.99 | 0 | — | 3.6 |
VC | en-GB | USD 2.99 | 0 | — | 3.6 |
VE | es-MX | USD 2.99 | 0 | — | 3.6 |
VG | en-GB | USD 2.99 | 0 | — | 3.6 |
VU | en-GB | USD 2.99 | 0 | — | 3.6 |
XK | en-GB | EUR 2.99 | 0 | — | 3.6 |
YE | en-GB | USD 2.99 | 0 | — | 3.6 |
ZM | en-GB | USD 3.99 | 0 | — | 3.6 |
ZW | en-GB | USD 3.99 | 0 | — | 3.6 |
Reviews 30 reviews · US
★★★★★
Review
Great product. Helped me diagnose some gps questions relating to a website we were developing. Very simple to use. Wish the Lodestone graph had one more bar to see when I have a 5th satellite.
Joe280662025-02-28
★★★★★
A Masterclass in App Design and Functionality
The GPS Diagnostic app is nothing short of phenomenal. It’s incredibly refreshing to find an app that not only meets but far exceeds expectations. Where do I even start?
First off, the user interface is clean and intuitive. The app is surprisingly easy to use but doesn’t compromise on the depth of its features or settings. Navigating through the options feels like a breeze, thanks to thoughtful design choices.
What sets this app apart is the exceptional in-app help and documentation. Far beyond what one would expect, it offers just the right amount of information, in just the right place, at
Andrew36012023-09-13
★★★★★
Excellent tool for troubleshooting and speed measurement
I successfully used this app to confirm the quality of the reception of satellite data. Months later I find myself in Japan on the Shinkansen “bullet” train wondering how fast we are traveling. This app provided the answer. In case you are wondering, we were traveling about ~275 km/hr!
MikeGilley2023-05-29
★★★★★
Works great
Very useful app. I really like that it shows your Lat & Lon!! I’m not sure why but it was the only GPS app that worked on the plane! It was nice to see the ground speed and altitude
Update - for some reason it no longer works?? I know my GPS is still working because all my apps that rely on it still work perfectly but according to this app it’s not receiving a signal from any satellites! It worked good for years and it just quit . Doesn’t display anything. Tried all the usual things . Restarted my phone checked for updates nothing helped.
Dave72002022-09-12
★★★★★
Garmin GLO - The Missing App (and more)
I've long been a fan of Garmin devices but was frustrated by the "just trust it's working" nature of the Garmin GLO 2 bluetooth GPS receiver. Garmin offers no status application to confirm device operation and basic navigation parameters. All you get is single LED on the device.
This app is FANTASTIC. It works well with the GLO 2 and provides the information that adds confidence to the device.
It's also great for built-in GPS, as it provides all critical navigation information. Most of the time, I just want to know the coordinates and altitude. All of this information is front and c
em25252022-09-06
★★★★★
Perfect
With the recent ending of CDMA as a time source for NTP servers we had to purchase new units that sourced time via GPS. Running into signal issues this app helped me locate a area where GPS signal was attainable. It’s a simple app but did everything I needed perfectly.
BLanczak2022-08-11
★★★★★
Impressive GPS
Inside my house 15 feet away from the window this shows I pick up 4 + Satellites. It’s nice to know whatever map app I use I can tell I’m getting a correct reading (location). I recommend this app.
SandyD572022-02-20
★★★★★
Outstanding Tool
This is a great tool for ensuring my other GPS-based apps are giving me valid information. It is worth the price many, many times over! Thanks so much for your perseverance in creating this! I wish I had had this app back in my earlier days when I was flying Rescue missions and working as a flight test engineer. Invaluable!! Thanks again!!
Consistent Runner2021-11-04
★★★★★
Great App
Have had issues with maps lately on my iPhone 8; very glitchy and seems off to precise location. Downloading this app seems to have helped a lot in resolving the issue.
T0mmmey2021-05-17
★★★★★
Great app
This is the only app I know of that shows the status of the GPS constellation it sees. It does a great job and certainly makes it interesting when the constellation drops out and Apple Maps starts to wonder. It is a must have!
ABusbey2020-05-30
★★★★★
Great for location testing
Was looking for an app that would help determine GPS Satélites, WiFi Location, Bluetooth and cell triangulation.
This app checks most of my boxes and it’s great when performing location testing with different hardware. It helps diagnose issues with connected devices that rely on gps as wel as FEM2Cell position for businesses that rely on good communication.
Kupcake2020-04-24
★★★★★
Absolutely fantastic
This is perfect! I have questions about how to get the best accuracy and what ‘the best accuracy’ means in terms of limits to the technology to the public. Would appreciate a few paragraphs about this to make it clearer. Thanks for a great product!
Anon-Person2020-03-03
★★★★★
Great App! Thanks!
This app is a gem. Lately I have been burned on a number of apps here and of course Apple, one of the richest companies in the world, makes it nearly impossible to get a refund. This app delivers and is worth the money.
neounixadmin2019-12-17
★★★★★
Pretty good but...
I wish the developer had made it clear in the app description that while multiple navigation systems are supported (GPS, GLONASS, Galileo, and QZSS) by iPhone the app can't display which satellite is which due to Apple’s limitations.
Consider this also a request to Apple to open this data up to developers, people are interested.
nhjsg2019-10-09
★★★★★
Great App if you want to see what your phone is doing
I bought this out of curiosity and I’m very happy with it. Gives you a ton of information about what your phone is actually doing. Great support when I tried using my new iPhone X to map my progress on a commercial flight (no, apparently new iPhones won’t do it any more)
Carguy078402019-09-12
★★★★★
Really Delivers What a GPS Diagnostic Tool Should
There are several apps that claim to provide GPS diagnostic capabilities. I think I looked at all of the others and they all fell far short of what they claimed. This app performs perfectly!
reacher fan2019-08-18
★★★★★
Very useful app.
My iPhone 6 started having gps problems resulting in navigation apps giving approximate location. Most of the time it shows me off the road. Annoying to say the least. This app showed my GPS had a signal problem. “ GPS on “ “ no signal “. Was able to install a new gps/WiFi antenna. Long story short, my iPhone gps works again.
Thanks to this app I got it sorted right away.
Kiteandsurf2019-06-27
★★★★★
Fantastic!
This is a great diagnostic tool. I gave it five stars. There is one feature I’d love to see extended: the sat data has four signal vertical bars: 1, 2, 3, 4 and greater. It would be even better if it could horizontally compress and expand to a per-PRN graph with Az-El-S/N data. Great app! 😊
esmith5122019-04-06
★★★★★
10 Stars! Apple Diagnostics Useless
This App is Fabulous!
Apple refuses to update their Apple Store / Apple Care troubleshooting diagnostics to include ANY GPS Functionality.
If you have such a problem they will tell you that you have No Problem. They will either deny it (Because it passes their tests ) or suggest you buy a new phone (sighting their diagnostics do not find ANY problem with your GPS).
With this diagnostic, I was able to prove the issue to Apple in seconds, but as my phone was out of warranty it was obvious they weren’t going to do anything about it. Tell anyone you know about this diagnostic especially if their
JL-19402019-02-26
★★★★★
A very useful app with unique capabilities
I believe this is the only simple app around to check GPS satellite acquisition. Gives lots of good data about accuracy activity and allows a reset of the GPS receiver.
Simple, useful, and still supported well by the developer. Definitely worth the small cost.
FortCollinsEngr2019-01-04
★★★★★
Saved my iPhone 6 from doom.
This app allowed me to confirm a hardware problem with the GPS antenna. I didn’t want to dismantle my phone unless I was sure it was a hardware issue. With the app running I could slap the phone into my palm and see intermittent satellite signals come and go. That knowledge plus a $3 part kit has me good to go for a few more years!
Fbchtfhj2018-12-26
★★★★★
Great App
Let’s me see my actual coordinates and provides useful diagnostics on how my phone is determining my location. I like having access to raw data from the sensors on my phone and this gets me better information than any of the other apps I have seen.
animator2002018-12-15
★★★★★
Helped identify the problem
My iPhone 6S Plus was getting erratic distance and pace readings with multiple running apps. This isolated the problem to the iPhone’s GPS.
Apple support had me reset the phone and reload firmware and iOS (from iTunes and a PC). That was painful, solved the problem.
Great app if you suspect GPS problems.
SanDiego3332018-08-31
★★★★★
Great tool
With this tool you can see whether your GPS is still working or not. Great tool as iPhone 6 has some issues and you need to reset network settings once in a while to solve these
K.O.Bold2018-08-23
★★★★★
Great app for IPhone users
Had a problem with navigation apps on my iPhone intermittently working and this helped diagnose the problem as software related. Saved me buying a new phone. The Apple Genius Bar people were very impressed as well. They said they were going to put it on their phones as well.
boaterbb2018-08-12
★★★★★
Very useful tool if maps act weird.
Used this app to determine that my internal gps antenna/software weren’t functioning correctly. When any mapping software was open they often didn’t seem to accurately display my exact location and any movement shown I was inaccurately spinning or wrong streets or direction etc etc. This awesome little app was extremely useful as it displayed whether I was actually connected to gps satellites and I discovered that I wasn’t. After firmly pressing on my phone where the internal antenna was located would reconnect a loose antenna and viola, a refresh of the app displayed correctly connection and
kf6dky2018-07-24
★★★★★
The single most useful app I’ve ever downloaded
I was troubleshooting a GPS issue in my car with Apple CarPlay. This app clearly identified it wasn’t my phone, as when I am not hooked up to the vehicle the GPS is spot-on. Amazing app.
Centurion722018-07-09
★★★★★
Thank God...
Literally one of the most useful apps I have ever used. My iPhone X was having horrible GPS issues under an iOS 11.4 install. I suspected a hardware fault after this app proved the phone was not pulling <any> GPS satellites and was instead relying on cell tower triangulation. After I did all the (failed) usual internet tips of resetting network settings, resetting privacy settings, toggling cell signal, etc. I thought I had proved the hardware fault. Went to Apple store to shove it under their nose. But there was a freak break-in the night before and the store was locked shut. Desperate
nefariousn82018-06-30
★★★★★
Fantastic
App worked as described. Was instrumental in diagnosing the issue I was having with gps signal. Simple easy to use interface. Had a question about possible cause of my problem, used the option to contact developer via email. Got a reply within 24 hours with exactly the info I needed. Would highly recommend. Now I can get my phone fixed, saved me a costly replacement.
Beleedad2018-06-07
★★★★★
Essential!
If you want a good, solid, under-the-hood look at your GPS hardware, and do some Location Services troubleshooting, this is the app for you. Data is presented in a very clear and comprehensive way. You can reset the GPS from within the app, too.
Loaded it on my iPhone 8 while a friend with a 6 did the same, and screen grabbed to show that mine saw multiple satellites, while the 6 was proven defective— no satellite bars.
Highly recommended!
Bongonaut2018-05-13
Change log 24 changes · US
✎
releaseNotes updated
80% reduction in file size to 35MB. Full support for latest iPad Pro 4th Generation.
✎
description updated
KEY FEATURES:
- Essential tool for your iPhone & iPad.
- Test the GPS module.
- Fast GPS lock time.
- Precise navigation parameters.
- Supplements operation of
✎
subtitle updated
Precise Coordinates & Altitude
✎
name updated
GPS Diagnostic: Satellite Test
◆
Version 3.6 released
80% reduction in file size to 35MB. Full support for latest iPad Pro 4th Generation.
◆
Version 3.5 released
Universal Transverse Mercator (UTM) coordinate system added.
◆
Version 3.4 released
User display improvements. Support for iPhone SE2 and older iPhones and iPads running iOS8 and iOS9.
◆
Version 3.3 released
Update to support latest iPhones and iPads: iPhone 11 / 11 Pro / 11 Pro Max and iPad mini 5th Gen/iPad 9.7 inch 7th Gen/iPad Air 3rd Gen.
◆
Version 3.2 released
Support for iPhone XS, XS Max, XR and latest iPad versions.
◆
Version 3.1 released
Application file size reduced by 50%.
◆
Version 3.0 released
Additional Coordinate Systems and Datums added as an In-App Purchase.
Lodestone Chart Algorithm update.
Compatibility update for new iPhones 8 and X.
◆
Version 2.9 released
Support for new iPad Pro 10.5" models.
◆
Version 2.8 released
- Chinese added.
◆
Version 2.7 released
- Russian added.
- Facebook app sharing and like button added.
◆
Version 2.6 released
iPhone 7 and 7 Plus compatible.
◆
Version 2.5 released
- Minor bug fix
- Minor improvements.
◆
Version 2.4 released
Share button on iPad is now functioning.
◆
Version 2.3 released
User interface & hardware detection optimization.
◆
Version 2.2 released
Universal version optimised for both iPad and iPhone.
◆
Version 2.1 released
User Interface Update.
◆
Version 2.0 released
Satellite bar chart added.
◆
Version 1.2 released
'Email Developer' feature added.
◆
Version 1.1 released
Improvement to user interface (GUI)
◆
Version 1.0 released
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