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What’s New Version 1.7.82
This update fixes an issue where users with saltwater pool types could see an app crash when navigating to set custom chemical ranges.
Description
Unlock crystal-clear pool water with Simple Pool - the pool chemistry calculator with no subscription, ever. One purchase, lifetime access.
Simple Pool helps you test, dose, and track your pool water chemistry with precision. Get CYA-aware sanitizer targets, practical dosing recommendations, and powerful tools that make routine pool maintenance faster and easier.
Whether you manage a chlorine pool, saltwater pool, bromine pool, or hot tub and spa, Simple Pool gives you accurate chemical calculations - including algae treatment dosing - every time. No more overspending at the pool store - just enter your test results and get exactly what your pool needs.
What you can do:
• Keep a chemical log of every addition with the unified Activity History
• Log full water tests or Quick Tests in seconds
• Built-in LSI calculator tracks the Langelier Saturation Index (LSI/CSI) to prevent scale and corrosion
• Get dosing recommendations for chlorine, acid, total alkalinity, calcium hardness, stabilizer, and more
• Set your exact chlorine concentration and acid strength for precise dosing
• Use Shock Treatment mode (chlorine/saltwater pools) with progress tracking
• Set recurring test reminders and shock retest reminders
• Use the Chemical Effects Calculator to preview chemical changes before dosing
• Track trends and test history over time with interactive charts
• Haptic feedback confirms pool status at a glance
• Support for chlorine, saltwater, and bromine pools
• Keep visual track of how your pool is doing over time by snapping a photo during water testing
• Share your pool's progress by tapping the share icon on your water test details
Simple Pool Pro (one-time purchase, no subscription):
• One-time purchase - no subscription, no recurring fees
• Unlimited pools and spas
• Full test and activity history
• 90-day and all-time trend ranges
• iCloud sync across Apple devices
Free includes:
• 1 pool
• Test logging and dosing recommendations
• 7-day and 30-day trends
• 30 days of history
Spend less time managing pool chemicals and more time enjoying your pool. Download Simple Pool and make pool care simple.
Links:
• Privacy Policy: https://sites.google.com/view/simple-pool-privacy-policy/home
• Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
In-App Purchases US pricing
One-Time Purchases
SimplePool - Lifetime$9.99
Capabilities
In-App Purchases
Accessibility
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Version history 25 versions
Build 888014006v1.7.822026-07-08 17:30:55
This update fixes an issue where users with saltwater pool types could see an app crash when navigating to set custom chemical ranges.
Build 887966314v1.7.82026-07-07 23:15:13
Thanks for using Simple Pool!
This update brings a clearer Trends experience with a new summary card, easier-to-read chart status, CSI tracking, and better visibility into recent pool activity.
Also included:
• Custom target ranges for Pro users
• New dry chemical options for dichlor, cal-hypo, and dry acid
• Bug fixes and maintenance
Build 887370358v1.7.62026-07-01 16:25:53
Thanks for using Simple Pool!
• This update fixes test targets that had drifted slightly from industry standard.
• Bug fixes and maintenance.
Build 887107166v1.7.42026-06-18 16:42:41
Thanks for using Simple Pool! This update brings more complete test logging and better stability across all devices.
• Smarter shock recommendations. Simple Pool now recommends shock treatment when your combined chlorine is too high - so you always know when it's time to act.
• More reliable under any conditions. Fixes a potential issue when app launches and configures the CloudKit container.
• Bug fixes and maintenance.
Build 886792032v1.7.22026-06-15 16:15:09
Thanks for using Simple Pool! This update makes setup smoother and keeps your test recommendations accurate.
• Cleaner recommendations. pH and alkalinity guidance is now combined into one step. No more duplicate or conflicting suggestions.
• Smoother setup on smaller screens. Bug fix where SE size devices were unable to complete setup.
• Bug fixes and maintenance.
Build 886589949v1.7.02026-06-06 17:06:57
Thanks for using Simple Pool! This update makes getting started easier and helps keep your test history accurate.
• Change pool types with confidence - switching your sanitizer type now warns you first, so your saved test recommendations aren't recalculated by surprise.
• A faster first test. After you add a pool, SimplePool now helps you log your first water test right away.
• Bug fixes and maintenance.
Build 886502397v1.6.82026-06-04 16:13:16
Thanks for using SimplePool! This update improves the accuracy of muriatic acid dosing recommendations.
• More accurate pH correction — acid dose calculations now account for your pool's total alkalinity, which buffers pH changes. Recommendations are now calibrated to your actual water chemistry.
• Bug fixes and maintenance.
Build 885889388v1.6.62026-05-25 22:48:03
Thanks for using Simple Pool! This update brings a few fun touches and some Pro polish.
• UI tweaks, text updates and maintenance.
• Updated translations across all supported languages.
Build 885698443v1.6.42026-05-16 17:13:10
Thanks for using Simple Pool! This update improves activity tracking, chemical logging, and history views.
• Added maintenance logging for tasks like cleaning filters, vacuuming, brushing walls, and servicing equipment.
• Added more chemical options, including trichlor, dichlor, cal-hypo, polyquat, algaecide, phosphate remover, clarifier, and metal sequestrant.
• Improved Activity History with maintenance entries and cleaner filtering.
• Refined Trends filtering with a simpler navigation bar control.
• Unified the layout of activity rows for tests, chemical additions, and maintenance logs.
• Updated tests, previews, and app data support for the new activity types.
Build 885450584v1.6.22026-05-10 19:08:35
Thanks for using Simple Pool! This update improves pool management, recommendations, and localization.
• Pool details now open in a smoother full-page flow.
• Recommendations now show when a suggested chemical addition has already been logged.
• Improved the flow for logging recommended chemical additions.
• Refined messaging around inventory and advanced features.
• Improved rating, sharing, and feedback options.
• Updated translations across the app.
Build 885360470v1.6.02026-05-07 19:28:02
NEW - Chemical Inventory (Pro)
Keep track of the chemicals you have at home. When you log a chemical addition, Simple Pool deducts it from your inventory automatically — so you'll know exactly what you need before your next pool store run. Includes smart matching, cross-unit math (oz/lb, fl oz/gallons), and low-stock alerts.
SMARTER CHLORINE TARGETS
Quick Tests skip CYA, and Full Tests sometimes do too. Simple Pool now falls back to your most recent CYA reading (within 60 days) so chlorine recommendations stay accurate. If there's no recent reading, you'll see a heads-up that the target is approximate — and a friendly reminder to test CYA when convenient.
METRIC FIX
The Chemical Effects Calculator now correctly handles metric units. Thanks to everyone who reported this!
Plus polish, translation updates, and a few quiet fixes under the hood.
Build 885196531v1.5.82026-05-03 01:55:43
Easier reinstalls. If you've used Simple Pool before, you'll now see a prompt to restore your data from iCloud when you set up the app again - no hunting through Settings required.
iCloud sync refreshes instantly. Toggling iCloud sync on or off no longer requires force-quitting the app. Simple Pool refreshes automatically and picks up right where you left off.
Redesigned navigation. The toolbar is cleaner and faster to use. Pool switching and Settings are now always one tap away.
Share cards look better. When sharing a test result, your pool photo now appears as the card background if no test photo was taken.
Bug fixes and performance improvements.
Build 885037636v1.5.62026-04-29 01:54:01
Simple Pool now makes it easier to log test results from other apps. Share a pool screenshot to Simple Pool, review the detected readings, make any needed edits, and save them to your test log.
This update also improves manual entry fields in Add Test and Quick Test, making it clearer when you can type a custom value instead of choosing one of the quick-select options.
Build 884380114v1.5.42026-04-23 02:37:32
This update makes sharing your pool results even easier with improved test share cards and a smoother preview experience. We also made a round of UI refinements, localization updates, and small bug fixes to keep Simple Pool feeling fast, polished, and ready for the season.
Build 884084649v1.5.22026-04-03 19:09:14
Ready for pool opening season?
This update adds a refreshed Spring Pool Opening Guide, including a National Pool Opening Day reminder for April 25, 2026. We also made the Bulletin Center easier to find with a dedicated top-bar button, so seasonal guides and updates are always within reach.
Also includes small UI refinements and localization updates.
Build 883955364v1.5.02026-04-01 04:20:44
You can now easily share your pool’s progress with others by tapping the share icon directly from your latest pool test detail.
Tweaked the UI for how you can now snap a photo when you test your water, letting you see how water clarity has improved over time.
Also includes stability improvements and under-the-hood refinements.
Build 883820107v1.4.82026-03-27 16:10:25
This update brings a new way to view your pool tests. You’re now able to snap a photo when you test your water - letting you see how your water clarity has improved over time or just giving you a reference for previous tests.
Also includes stability improvements and under-the-hood refinements.
Build 883309621v1.4.62026-03-13 17:08:57
This update adds a Water Balance Gauge to your test results - a visual indicator that shows whether your water is corrosive, balanced, or scale forming at a glance (CSI). No more decoding raw numbers.
Also includes stability improvements and under-the-hood refinements.
Build 883140419v1.4.42026-03-08 18:35:29
Thanks for using Simple Pool! This update includes stability improvements and under-the-hood refinements to keep things running smoothly.
Build 883032720v1.4.22026-03-06 17:25:47
A Faster, Cleaner Start
• Now opens straight to your pool - no list screen, no extra tap. The app remembers where you left off and gets you right to your water chemistry.
• Pool switching, settings, and bulletins are a tap away from the ellipsis menu in the top corner, keeping the main view focused on what matters: your pool. Switching to a different pool or spa is just a tap away as well.
Weather-Aware Recommendations
• SimplePool now checks local weather conditions when building your dosing recommendations. High UV days, recent rain, and temperature swings all affect your water chemistry - now the app accounts for them automatically.
Redesigned Navigation
• Pool switching is cleaner and faster. Your last pool opens instantly, and a single tap gets you to settings, bulletins, or another pool without getting lost in menus.
Quick-Log from Recommendations
• Long-press any recommendation to preview it and log the chemical addition in one step - no need to leave the screen.
Rich Previews
• Long-press on tests, chemical additions, and bulletins to peek at details before opening them.
Plus the usual round of translation improvements and polish.
Build 882880428v1.4.02026-03-01 17:27:13
Bulletin Center
A new in-app feed for seasonal guides, tips, and important notices no push notifications required. Check the flag icon to see what's new.
Spring Pool Opening Guide
A step-by-step walkthrough for opening your pool this season, including timing tips, equipment prep, and a built-in reminder so the first warm day doesn't sneak up on you.
Also in this update
• Input validation warnings and dosing caps to prevent over-treatment
• Bug fixes for decimal input and cyanuric acid range display
Build 882667725v1.3.82026-02-27 07:24:24
Chemical Addition Tracking: Log every chemical you add to your pool. A new unified Activity History shows your tests and additions on one timeline so you can see exactly what you've done and when.
Accurate Dosing for Your Products: Set your exact liquid chlorine concentration (6%–15%) and muriatic acid strength (14.5%–31.45%) in Settings. Recommendations match the product strengths you use.
Redesigned Onboarding: A fresh setup experience with smooth animations guides new users through pool configuration step by step.
Haptic Feedback: Subtle feedback confirm ideal chemistry, while stronger alerts flag issues that need attention.
Persistent Safety Warnings: Important chemical handling cautions now stay visible in recommendation details.
Bug Fixes: Fixed calcium hardness recommendations when changing pool structure, standardized salt ranges across all views, and improved pH method consistency.
Build 882625680v1.3.62026-02-20 20:26:16
Redesigned Settings
Organized into sections (Preferences, Pool Chemistry, Account & Data) so you can find what you need faster.
Test Reminders
Tap a test reminder notification will now go straight to logging a new test.
Community
Find us on Instagram, Threads, and Reddit from Settings. Come say hi!
Bug Fixes & Improvements
• Set pool volume validation when adding or editing pools
• Fixed CSI calculation accuracy for TDS handling
• Fixed range indicator display logic
• Improved camera availability checks
Build 882419060v1.3.42026-02-14 00:19:47
• Added Quick Test logging for fast pH, sanitizer, and alkalinity entries.
• Added Shock Treatment mode with CYA-based targets, progress tracking, and completion checklist.
• Added scheduled Test Reminders plus frequent reminders during shock treatment.
• Added Chemical Effects Calculator to preview dosing impact before adding chemicals.
• Improved chlorine/CYA safety guidance and refined muriatic acid dosing recommendations.
• Expanded and improved localization quality across supported languages.
Build 882176115v1.3.22026-02-09 15:37:23
Adds Italian, Dutch and Portuguese language support.
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Availability 1 of 1 storefronts
| Region | Language | Price | Ratings | Avg | Version |
|---|---|---|---|---|---|
| US | en-US | Free | 18 | 4.9 | 1.7.82 |
Change log 29 changes · US
✎
releaseNotes updated
This update fixes an issue where users with saltwater pool types could see an app crash when navigating to set custom chemical ranges.
✎
description updated
Unlock crystal-clear pool water with Simple Pool - the pool chemistry calculator with no subscription, ever. One purchase, lifetime access.
Simple Pool helps y
✎
subtitle updated
Pool Care Chemical Calculator
✎
name updated
Simple Pool: Chemistry & Math
◆
Version 1.7.82 released
This update fixes an issue where users with saltwater pool types could see an app crash when navigating to set custom chemical ranges.
◆
Version 1.7.8 released
Thanks for using Simple Pool!
This update brings a clearer Trends experience with a new summary card, easier-to-read chart status, CSI tracking, and better visibility into recent pool activity.
Also included:
• Custom target ranges for Pro
◆
Version 1.7.6 released
Thanks for using Simple Pool!
• This update fixes test targets that had drifted slightly from industry standard.
• Bug fixes and maintenance.
◆
Version 1.7.4 released
Thanks for using Simple Pool! This update brings more complete test logging and better stability across all devices.
• Smarter shock recommendations. Simple Pool now recommends shock treatment when your combined chlorine is too high - so y
◆
Version 1.7.2 released
Thanks for using Simple Pool! This update makes setup smoother and keeps your test recommendations accurate.
• Cleaner recommendations. pH and alkalinity guidance is now combined into one step. No more duplicate or conflicting suggestions.
◆
Version 1.7.0 released
Thanks for using Simple Pool! This update makes getting started easier and helps keep your test history accurate.
• Change pool types with confidence - switching your sanitizer type now warns you first, so your saved test recommendations a
◆
Version 1.6.8 released
Thanks for using SimplePool! This update improves the accuracy of muriatic acid dosing recommendations.
• More accurate pH correction — acid dose calculations now account for your pool's total alkalinity, which buffers pH changes. Recommen
◆
Version 1.6.6 released
Thanks for using Simple Pool! This update brings a few fun touches and some Pro polish.
• UI tweaks, text updates and maintenance.
• Updated translations across all supported languages.
◆
Version 1.6.4 released
Thanks for using Simple Pool! This update improves activity tracking, chemical logging, and history views.
• Added maintenance logging for tasks like cleaning filters, vacuuming, brushing walls, and servicing equipment.
• Added more chemic
◆
Version 1.6.2 released
Thanks for using Simple Pool! This update improves pool management, recommendations, and localization.
• Pool details now open in a smoother full-page flow.
• Recommendations now show when a suggested chemical addition has already been log
◆
Version 1.6.0 released
NEW - Chemical Inventory (Pro)
Keep track of the chemicals you have
◆
Version 1.5.8 released
Easier reinstalls. If you've used Simple Pool before, you'll now see a prompt to restore your data from iCloud when you set up the app again - no hunting through Settings required.
iCloud sync refreshes instantly. Toggling iCloud sync on o
◆
Version 1.5.6 released
Simple Pool now makes it easier to log test results from other apps. Share a pool screenshot to Simple Pool, review the detected readings, make any needed edits, and save them to your test log.
This update also improves manual entry fields
◆
Version 1.5.4 released
This update makes sharing your pool results even easier with improved test share cards and a smoother preview experience. We also made a round of UI refinements, localization updates, and small bug fixes to keep Simple Pool feeling fast, po
◆
Version 1.5.2 released
Ready for pool opening season?
This update adds a refreshed Spring Pool Opening Guide, including a National Pool Opening Day reminder for April 25, 2026. We also made the Bulletin Center easier to find with a dedicated top-bar button, so s
◆
Version 1.5.0 released
You can now easily share your pool’s progress with others by tapping the share icon directly from your latest pool test detail.
Tweaked the UI for how you can now snap a photo when you test your water, letting you see how water clarity has
◆
Version 1.4.8 released
This update brings a new way to view your pool tests. You’re now able to snap a photo when you test your water - letting you see how your water clarity has improved over time or just giving you a reference for previous tests.
Also includes
◆
Version 1.4.6 released
This update adds a Water Balance Gauge to your test results - a visual indicator that shows whether your water is corrosive, balanced, or scale forming at a glance (CSI). No more decoding raw numbers.
Also includes stability improvements a
◆
Version 1.4.4 released
Thanks for using Simple Pool! This update includes stability improvements and under-the-hood refinements to keep things running smoothly.
◆
Version 1.4.2 released
A Faster, Cleaner Start
• Now opens straight to your pool - no list screen, no extra tap. The app remembers where you left off and gets you right to your water chemistry.
• Pool switching, settings, and bulletins are a tap away from the ell
◆
Version 1.4.0 released
Bulletin Center
A new in-app feed for seasonal guides, tips, and important notices no push notifications required. Check the flag icon to see what's new.
Spring Pool Opening Guide
A step-by-step walkthrough for opening your pool t
◆
Version 1.3.8 released
Chemical Addition Tracking: Log every chemical you add to your pool. A new unified Activity History shows your tests and additions on one timeline so you can see exactly what you've done and when.
Accurate Dosing for Your Products: Set you
◆
Version 1.3.6 released
Redesigned Settings
Organized into sections (Preferences, Pool Chemistry, Account & Data) so you can find what you need faster.
Test Reminders
Tap a test reminder notification will now go straight to logging a new test.
Community
Find us
◆
Version 1.3.4 released
• Added Quick Test logging for fast pH, sanitizer, and alkalinity entries.
• Added Shock Treatment mode with CYA-based targets, progress tracking, and completion checklist.
• Added scheduled Test Reminders plus frequent reminders during sho
◆
Version 1.3.2 released
Adds Italian, Dutch and Portuguese language support.