# 531 Strength vs Sentiero

The clearest difference is price: 531 Strength at Free against Sentiero's $0.99. Sentiero's advantage is in-app purchases (none vs 4) and ads (none vs shown). On update cadence, device support and iOS requirement there is nothing between them.

531 Strength is free to download; Sentiero costs $0.99 up front. 531 Strength sells 4 one-off in-app purchases. Sentiero asks for nothing beyond the download.

531 Strength ships an update every 2 months, Sentiero every 3 months. The most recent releases landed on October 27, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | 531 Strength | Sentiero |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.9 (12K ratings)](https://appshunter.io/ios/app/531-strength/id1062989244/reviews)** | — |
| Number of ratings | **12K** | — |
| Positive reviews | 94.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 26 MB | 7 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Henrik Jachobsen](https://appshunter.io/developer/497731838) | [Casey Childers](https://appshunter.io/developer/1881243925) |

## What reviewers say

### 531 Strength

[App page](https://appshunter.io/ios/app/531-strength/id1062989244)

This app simplifies tracking your progress on the 5/3/1 strength training program. It calculates and displays weights, reps, and sets based on your one-rep max, allowing you to easily plan and execute your workouts. Rounding options help match available gym plates.

**Highlights:** Calculate 5/3/1 weights, Track 1RM for exercises, View cycle step weights, Round weights to available plates, Full overview of weights, reps, sets

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Additional exercises | $1.99 | one-time |
| Adjustable set | $1.99 | one-time |
| Plate calculator | $1.99 | one-time |
| Progress log | $6.99 | one-time |

**What reviewers like**

- 🚀 Simple and efficient
- 👍 Intuitive interface
- 💪 Helps with strength gains
- 🔧 Customizable features
- ⏱️ Convenient timer

**What reviewers complain about**

- 🔢 Inaccurate percentage calculations
- 🗓️ Lack of ability to plan future workouts
- 📋 Limited exercise tracking
- 💰 Paid features not worth the cost

**Reported bugs**

- Rest timer stops when app is backgrounded
- Plate calculator not flexible enough

**Requested features**

- Ability to adjust training max separately from 1RM
- Option to track rep PRs and estimated 1RM
- Accessory exercise tracking and planning
- Sync progress across devices


### Sentiero

[App page](https://appshunter.io/ios/app/sentiero/id6759917445)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 531 Strength free?

531 Strength is free to download, with in-app purchases available.

### Is Sentiero free?

Sentiero costs $0.99, with no in-app purchases.

### Do 531 Strength or Sentiero have ads?

531 Strength shows ads; Sentiero does not.

### Which is updated more often, 531 Strength or Sentiero?

531 Strength ships an update every 2 months, and Sentiero every 3 months. Most recently, 531 Strength was updated on October 27, 2026 and Sentiero on October 9, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*