# 531 Strength

> Keep focus on your lifts

Canonical page: [https://chrome-stats.com/d/com.jachobsen.fivethreeone](https://chrome-stats.com/d/com.jachobsen.fivethreeone)

## Overview

- **ID:** `com.jachobsen.fivethreeone`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** Strength Lab
- **Category:** HEALTH\_AND\_FITNESS
- **Downloads:** 20,536
- **Rating:** 4.82 / 5 (106 ratings)
- **Version:** 1.1.8
- **Last updated:** 2026-07-26
- **First published:** 2022-01-01
- **Publisher country:** DK
- **Size:** 28 MB
- **Data as of:** 2026-09-18
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.jachobsen.fivethreeone)
- **Website:** [https://531.jachobsen.io](https://531.jachobsen.io/)
- **Privacy policy:** [https://531.jachobsen.io/privacy](https://531.jachobsen.io/privacy)

## Description

531 Strength is a Chrome extension designed for lifters following the 5/3/1 program. It provides a clear and quick overview of all weights, reps, and sets calculated from your saved 1RM for four core exercises. Users can easily view the suggested weights for each cycle step and round them to match the plates they have available, ensuring practical and efficient workouts. This tool simplifies managing your 5/3/1 progression so you can focus on lifting and tracking your strength gains effectively.

## Rankings

- #430,876 — Overall

## Permissions and access

### Permissions

- `android.permission.ACCESS_ADSERVICES_AD_ID`
- `android.permission.ACCESS_ADSERVICES_ATTRIBUTION`
- `android.permission.ACCESS_ADSERVICES_TOPICS`
- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.FOREGROUND_SERVICE`
- `android.permission.INTERNET`
- `android.permission.POST_NOTIFICATIONS`
- `android.permission.RECEIVE_BOOT_COMPLETED`
- `android.permission.SCHEDULE_EXACT_ALARM`
- `android.permission.USE_EXACT_ALARM`
- `android.permission.VIBRATE`
- `android.permission.WAKE_LOCK`
- `com.android.vending.BILLING`
- `com.google.android.gms.permission.AD_ID`
- `com.jachobsen.fivethreeone.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`

## Review summary

Users praise the app for its simplicity, accuracy, and effective tracking aligned with the 5/3/1 strength program. It's favored for its clean interface and core functionality without unnecessary complications. However, multiple users note the absence of tracking features like a calendar found in the iOS version and report bugs, especially concerning premium features. Overall, it is considered the best 5/3/1 app on Android with room for improvements in syncing and customization.

### Pros

- Simple and user-friendly interface making it easy to use.
- Accurate calculations aligned with the 5/3/1 program.
- Effectively helps users track progress and manage workouts.
- Highly recommended by users familiar with 5/3/1 training.
- Includes useful features like workout timers, logs, and graphs.

### Cons

- Lacks calendar or tracking features present in the iOS version, leading to disappointment among Android users.
- Some users experienced bugs, particularly with premium features and purchases.
- Could benefit from enhancements like better syncing options, saving additional sets, and customization of plate weights.

## Similar extensions and apps

- [531 Strength](https://chrome-stats.com/d/com.alexcheuk.fivethreeone) — 45 users
- [531 Workout Tracker](https://chrome-stats.com/d/workout.tracker) — 438 users
- [531 Workout Log - KeyLifts](https://chrome-stats.com/d/com.ultimate531) — 20,816 users, 4.56 / 5
- [Barbell531](https://chrome-stats.com/d/com.barbell531.app) — 1 users
- [Five/Three/One - 531 Workouts](https://chrome-stats.com/d/dev.strongpigeon.fivethreeone) — 13,664 users, 4.77 / 5
- [repeat531](https://chrome-stats.com/d/fred.sioxc.repeat531) — 162 users
- [Fast 5/3/1 Workout Calculator](https://chrome-stats.com/d/com.JosephN.Fast531) — 5,811 users, 4.88 / 5
- [Rep Rank](https://chrome-stats.com/d/com.yutasakai.reprank) — 14 users
- [Wendler 5/3/1 log](https://chrome-stats.com/d/com.sarasoft.es.fivethreeonebasic) — 248,970 users, 4.83 / 5
- [Iron Calc — Gym 1RM & Plates](https://chrome-stats.com/d/com.liveqbits.ironcalc) — 18 users
- [Wendler Log 531](https://chrome-stats.com/d/com.vandersw.wenderlogbook) — 137,514 users, 4.39 / 5
- [1 Rep Max - LiftPro](https://chrome-stats.com/d/com.mycompany.design1rm) — 12 users

---

Source: [Chrome-Stats](https://chrome-stats.com/d/com.jachobsen.fivethreeone)