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531 Strength

Keep focus on your lifts
US flag US
1 of 1 storefronts
Content in en-US
11.5k Ratings
4.9
★★★★★
Age Rating
4+
Years
Language
EN
Size
29.3
MB

Information

Apple ID1062989244
Bundle IDcom.jachobsen.fivethreeone
SellerSeller
Min iOS17.6
Min macOS14.6
Device familiesiphone, ipad
Released2015-12-14
Copyright© 2025 Jachobsen
WebsiteLink ↗
Privacy policyLink ↗

Preview 2 platforms

iPhone 4 images

iPhone screenshot
iPhone screenshot
iPhone screenshot
iPhone screenshot

iPad 4 images

iPad screenshot
iPad screenshot
iPad screenshot
iPad screenshot

What’s New Version 2.26

Thank you for using 531 Strength! This update includes: - Stability fixes - Minor UI improvements If you enjoy the app, please support the further development of the app by making an in-app purchase.

Description

Makes it quick and easy to get a full overview of all weights, reps and sets based off your 1RM when you’re following the 5/3/1 program. - Save your current 1 RM for each of the four exercises - View calculated weights for each step in the cycle - Round the weight to match the plates you have available This app is made for people who are familiar with the structure of the 5/3/1 program and who needs simple access to the calculated weights for each exercise.

In-App Purchases US pricing

One-Time Purchases
Additional exercises$1.99
Adjustable set$1.99
Plate calculator$1.99
Progress log$6.99

Capabilities

In-App Purchases

Accessibility

ipadiphonemacrealityDevicetvoswatch

Version history 25 versions

Build 881401348v2.262026-01-11 23:37:32
Thank you for using 531 Strength! This update includes: - Stability fixes - Minor UI improvements If you enjoy the app, please support the further development of the app by making an in-app purchase.
Build 880483395v2.252025-12-09 22:51:27
Thank you for using 531 Strength! This update includes: - Minor UI improvements If you enjoy the app, please support the further development of the app by making an in-app purchase.
Build 879980768v2.242025-12-06 21:30:53
Thank you for using 531 Strength! This update includes: - iOS 26 support If you enjoy the app, please support the further development of the app by making an in-app purchase.
Build 876173007v2.232025-07-07 20:31:25
Thank you for using 531 Strength! This update includes: - iOS 18 support If you enjoy the app, please support the further development of the app by making an in-app purchase.
Build 846345050v2.222022-01-02 13:06:11
Thank you for using 531 Strength! This update includes: - Minor UI improvements If you enjoy the app, please support the further development of the app by making an in-app purchase.
Build 842338957v2.212021-05-23 20:20:52
Thank you for using 531 Strength! This update includes: - Fix chart rendering - Allow editing logged reps on last set If you enjoy the app, please support the further development of the app by making an in-app purchase.
Build 842295557v2.202021-05-20 09:27:38
Thank you for using 531 Strength! This update includes: - Fix chart rendering If you enjoy the app, please support the further development of the app by making an in-app purchase.
Build 842244213v2.192021-05-18 16:10:05
Thank you for using 531 Strength! This update includes: - Added weight precision: 1.0 - iOS 14.5 support If you enjoy the app, please support the further development of the app by making an in-app purchase.
Build 837607220v2.182020-09-02 16:46:11
Thank you for using 531 Strength! This update includes: - Design improvements and UI tweaks - Fix issue with default exercises sorting If you enjoy the app, please support the further development of the app by making an in-app purchase.
Build 837570862v2.172020-08-31 18:21:53
Thank you for using 531 Strength! This update includes: - Design improvements and UI tweaks If you enjoy the app, please support the further development of the app by making an in-app purchase.
Build 835324911v2.162020-03-31 16:13:21
Thank you for using 531 Strength! This update includes: - Minor stability fixes If you enjoy the app, please support the further development of the app by making an in-app purchase.
Build 834486704v2.152020-01-25 12:15:43
Thank you for using 531 Strength! This update includes: - Minor stability fixes If you enjoy the app, please support the further development of the app by making an in-app purchase.
Build 834151319v2.142019-12-27 22:50:13
Thank you for using 531 Strength! This update includes: - Improved stability for users running iOS 13 If you enjoy the app, please support the further development of the app by making an in-app purchase.
Build 833904433v2.132019-12-07 20:54:06
Thank you for using 531 Strength! This update includes: - 70% option to TM percentages - Confirmation alert when removing an exercise that has log entries - Minor changes to the design for improved iOS13 experience If you enjoy the app, please support the further development of the app by making an in-app purchase.
Build 831738031v2.122019-06-21 05:54:09
Thank you for using 531 Strength! Rest timer: - Rest timer notifications got an action to restart the timer directly from the notification - Added setting to enable having the timer automatically show when marking a set as done Progress log: - Log entry date and week is now editable - Last set reps are included in the calendar overview when choosing list mode Other: - Added 75% option to TM percentages - Minor changes to the design If you enjoy the app, please support the further development of the app by making an in-app purchase.
Build 829898003v2.112019-01-21 21:06:43
Thank you for using 531 Strength! Minor update with improved graph drawing If you enjoy the app, please support the further development of the app by making an in-app purchase.
Build 829500151v2.102018-12-04 05:25:21
Thank you for using 531 Strength! Rest timer - Updated controls to resemble normal stopwatch (Start/Stop/Reset) - The timer will now continue to run when you tap outside the timer window to dismiss it. - You can also opt in to receive a push notification* if the timer times out while the app is in the background. * Privacy note: It's just local notifications, the push is created and managed on your own device. If you enjoy the app, please support the further development of the app by making an in-app purchase.
Build 829201829v2.92018-12-01 21:52:17
Thank you for using 531 Strength! Rest timer - Updated controls to resemble normal stopwatch (Start/Stop/Reset) - The timer will now continue to run when you tap outside the timer window to dismiss it. - You can also opt in to receive a push notification* if the timer times out while the app is in the background. * Privacy note: It's just local notifications, the push is created and managed on your own device. If you enjoy the app, please support the further development of the app by making an in-app purchase.
Build 828946954v2.82018-10-19 05:43:49
Thank you for using 531 Strength! - Now you can select specific exercises before adjusting weight at end of cycle - Leave out deload weeks from ~1RM graphs - Update for iOS 12 and improved iPhone XS layouts If you enjoy the app, please support the further development of the app by making an in-app purchase.
Build 826839741v2.72018-04-27 14:51:53
Thank you for using 531 Strength! - You can now rearrange the order of exercises (for users with additional exercises). At the end of the list there is now a "Move" button. - The TM toggle button (90%) has been moved to Settings If you enjoy the app, please support the further development of the app by making an in-app purchase or tapping a few ads once in a while.
Build 826517677v2.62018-04-01 17:04:05
Thank you for using 531 Strength! - Added ability to tap a set to mark/unmark it as done - enable it in Settings. NB: This disables the double tap shortcut to open the rest timer. - You can now launch the app via the URL scheme: x531Strength:// - Fixed a small bug with CSV exporting long notes If you enjoy the app, please support the further development of the app by making an in-app purchase or tapping a few ads once in a while.
Build 826036767v2.52018-02-19 17:52:38
Thank you for using 531 Strength! - Minor bug fixes If you experience problems with the app, please contact me through the feedback email before writing negative reviews. It is a lot easier to respond to have a conversation via e-mail when solving bugs. If you enjoy the app, please support the further development of the app by making an in-app purchase or tapping a few ads once in a while.
Build 826027395v2.42018-02-17 19:46:14
Thank you for using 531 Strength! - You can now edit weight and notes for previous log entries - New list view for calendar with search option - Bar weight setting changed to a stepper instead of predefined list If you enjoy the app, please support the further development of the app by making an in-app purchase or tapping a few ads once in a while.
Build 825473055v2.32017-12-30 08:29:37
Thank you for using 531 Strength! Minor update this time: - Based on user feedback, a new graph has been added for estimated 1RM based on last set reps. You can now specify the rep count when adding to log - Added 35lb barbell option to plate calculator - If weight precision is set to 0.5, plate calculator will now output remainder (dimmed) when present - Minor bug fixes If you enjoy the app, please support the further development of the app by making an in-app purchase or tapping a few ads once in a while.
Build 825275872v2.22017-12-11 23:09:34
Thank you for using 531 Strength! Minor update this time: - Added 40lb barbell option to plate calculator - Minor bug fixes If you enjoy the app, please support the further development of the app by making an in-app purchase or tapping a few ads once in a while.
Additional exercises

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Change log 29 changes · US

releaseNotes updated
Thank you for using 531 Strength! This update includes: - Stability fixes - Minor UI improvements If you enjoy the app, please support the further development
description updated
Makes it quick and easy to get a full overview of all weights, reps and sets based off your 1RM when you’re following the 5/3/1 program. - Save your current 1
subtitle updated
Keep focus on your lifts
name updated
531 Strength
Version 2.26 released
Thank you for using 531 Strength! This update includes: - Stability fixes - Minor UI improvements If you enjoy the app, please support the further development of the app by making an in-app purchase.
Version 2.25 released
Thank you for using 531 Strength! This update includes: - Minor UI improvements If you enjoy the app, please support the further development of the app by making an in-app purchase.
Version 2.24 released
Thank you for using 531 Strength! This update includes: - iOS 26 support If you enjoy the app, please support the further development of the app by making an in-app purchase.
Version 2.23 released
Thank you for using 531 Strength! This update includes: - iOS 18 support If you enjoy the app, please support the further development of the app by making an in-app purchase.
Version 2.22 released
Thank you for using 531 Strength! This update includes: - Minor UI improvements If you enjoy the app, please support the further development of the app by making an in-app purchase.
Version 2.21 released
Thank you for using 531 Strength! This update includes: - Fix chart rendering - Allow editing logged reps on last set If you enjoy the app, please support the further development of the app by making an in-app purchase.
Version 2.20 released
Thank you for using 531 Strength! This update includes: - Fix chart rendering If you enjoy the app, please support the further development of the app by making an in-app purchase.
Version 2.19 released
Thank you for using 531 Strength! This update includes: - Added weight precision: 1.0 - iOS 14.5 support If you enjoy the app, please support the further development of the app by making an in-app purchase.
Version 2.18 released
Thank you for using 531 Strength! This update includes: - Design improvements and UI tweaks - Fix issue with default exercises sorting If you enjoy the app, please support the further development of the app by making an in-app purchase.
Version 2.17 released
Thank you for using 531 Strength! This update includes: - Design improvements and UI tweaks If you enjoy the app, please support the further development of the app by making an in-app purchase.
Version 2.16 released
Thank you for using 531 Strength! This update includes: - Minor stability fixes If you enjoy the app, please support the further development of the app by making an in-app purchase.
Version 2.15 released
Thank you for using 531 Strength! This update includes: - Minor stability fixes If you enjoy the app, please support the further development of the app by making an in-app purchase.
Version 2.14 released
Thank you for using 531 Strength! This update includes: - Improved stability for users running iOS 13 If you enjoy the app, please support the further development of the app by making an in-app purchase.
Version 2.13 released
Thank you for using 531 Strength! This update includes: - 70% option to TM percentages - Confirmation alert when removing an exercise that has log entries - Minor changes to the design for improved iOS13 experience If you enjoy the app, p
Version 2.12 released
Thank you for using 531 Strength! Rest timer: - Rest timer notifications got an action to restart the timer directly from the notification - Added setting to enable having the timer automatically show when marking a set as done Progress l
Version 2.11 released
Thank you for using 531 Strength! Minor update with improved graph drawing If you enjoy the app, please support the further development of the app by making an in-app purchase.
Version 2.10 released
Thank you for using 531 Strength! Rest timer - Updated controls to resemble normal stopwatch (Start/Stop/Reset) - The timer will now continue to run when you tap outside the timer window to dismiss it. - You can also opt in to receive a pu
Version 2.9 released
Thank you for using 531 Strength! Rest timer - Updated controls to resemble normal stopwatch (Start/Stop/Reset) - The timer will now continue to run when you tap outside the timer window to dismiss it. - You can also opt in to receive a p
Version 2.8 released
Thank you for using 531 Strength! - Now you can select specific exercises before adjusting weight at end of cycle - Leave out deload weeks from ~1RM graphs - Update for iOS 12 and improved iPhone XS layouts If you enjoy the app, please su
Version 2.7 released
Thank you for using 531 Strength! - You can now rearrange the order of exercises (for users with additional exercises). At the end of the list there is now a "Move" button. - The TM toggle button (90%) has been moved to Settings If you en
Version 2.6 released
Thank you for using 531 Strength! - Added ability to tap a set to mark/unmark it as done - enable it in Settings. NB: This disables the double tap shortcut to open the rest timer. - You can now launch the app via the URL scheme: x531Streng
Version 2.5 released
Thank you for using 531 Strength! - Minor bug fixes If you experience problems with the app, please contact me through the feedback email before writing negative reviews. It is a lot easier to respond to have a conversation via e-mail whe
Version 2.4 released
Thank you for using 531 Strength! - You can now edit weight and notes for previous log entries - New list view for calendar with search option - Bar weight setting changed to a stepper instead of predefined list If you enjoy the app, plea
Version 2.3 released
Thank you for using 531 Strength! Minor update this time: - Based on user feedback, a new graph has been added for estimated 1RM based on last set reps. You can now specify the rep count when adding to log - Added 35lb barbell option to pl
Version 2.2 released
Thank you for using 531 Strength! Minor update this time: - Added 40lb barbell option to plate calculator - Minor bug fixes If you enjoy the app, please support the further development of the app by making an in-app purchase or tapping a
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