# S2 vs Progression

The clearest difference is rating: Progression at 4.5 against S2's 4.1. Progression also leads on review sentiment (59% vs 41%) and update cadence (weekly vs fortnightly). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. S2 sells 2 in-app purchases, starting at $22.99 per year and Progression sells 5 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Progression holds the better App Store score, 4.5 against 4.1. Both are backed by a comparable volume of ratings — 126 and 160 respectively. Written reviews point the same way: 41% of S2's written reviews are positive against 59% of Progression's.

S2 ships an update fortnightly, Progression weekly. The most recent releases landed on October 12, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | S2 | Progression |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (126 ratings)](https://appshunter.io/ios/app/s2-strength-log/id1007310227/reviews) | **[4.5 (160 ratings)](https://appshunter.io/ios/app/progression-workout-tracker/id1090687896/reviews)** |
| Number of ratings | 126 | **160** |
| Positive reviews | 41.3% of reviews | **58.8% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 9 MB | 37 MB |
| Requires iOS | **16.0** | 17.6 |
| Devices | iPhone | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Formbound AB](https://appshunter.io/developer/531002945) | [Martin Pietrowski](https://appshunter.io/developer/1085206751) |

## What reviewers say

### S2

[App page](https://appshunter.io/ios/app/s2-strength-log/id1007310227)

This app helps you track and visualize your gym workout progress, encouraging progressive overload for weight loss or muscle gain. It offers a fast, intuitive interface with over 1000 exercises and a unique muscle fatigue heat map. No account is needed, and it integrates with HealthKit.

**Highlights:** Track and visualize workout progress, Muscle fatigue heat map, Create unlimited workout routines, Encourages progressive overload, 1000+ exercises, Workout history review, HealthKit integration

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| S2 Yearly | $22.99 | per year |
| Strongly Pro | $4.99 | one-time |


### Progression

[App page](https://appshunter.io/ios/app/progression-workout-tracker/id1090687896)

This app helps you track your fitness progress with a minimalist and fast interface. It automatically adjusts your weight and reps to help you break through plateaus and see results. Enjoy a clean design with no ads and deep iOS integration.

**Highlights:** One-tap logging, Automatic progression adjustments, Plateau recognition, Detailed stats and charts, Clean, ad-free interface, iOS exclusive features (Widgets, Dynamic Island)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO | $6.99 | per 7 days |
| PRO | $12.99 | per month |
| PRO | $79.99 | per year |
| Free Unlimited Workouts | Free | one-time |
| PRO | $99.99 | one-time |


## Frequently asked questions

### Is S2 free?

S2 is free to download, with in-app purchases available.

### Is Progression free?

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

### Which has better reviews, S2 or Progression?

Progression is rated higher. S2 averages 4.1 out of 5 from 126 ratings, while Progression averages 4.5 from 160 ratings.

### Do S2 or Progression have ads?

Neither S2 nor Progression shows ads.

### Which is updated more often, S2 or Progression?

S2 ships an update fortnightly, and Progression weekly. Most recently, S2 was updated on October 12, 2026 and Progression on October 1, 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.*