# S2 vs OnPace Running

The clearest difference is in-app purchases: OnPace Running at none against S2's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. S2 sells 2 in-app purchases, starting at $22.99 per year. OnPace Running asks for nothing beyond the download.

S2 ships an update fortnightly, OnPace Running every 2 weeks. The most recent releases landed on October 12, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | S2 | OnPace Running |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (126 ratings)](https://appshunter.io/ios/app/s2-strength-log/id1007310227/reviews)** | — |
| Number of ratings | **126** | — |
| Positive reviews | 41.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 9 MB | 3 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Formbound AB](https://appshunter.io/developer/531002945) | [paul zogmann](https://appshunter.io/developer/1896571989) |

## 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 |


### OnPace Running

[App page](https://appshunter.io/ios/app/onpace-running/id6798366583)

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

**In-app purchases:** none


## Frequently asked questions

### Is S2 free?

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

### Is OnPace Running free?

OnPace Running is free to download, with no in-app purchases.

### Do S2 or OnPace Running have ads?

Neither S2 nor OnPace Running shows ads.

### Which is updated more often, S2 or OnPace Running?

S2 ships an update fortnightly, and OnPace Running every 2 weeks. Most recently, S2 was updated on October 12, 2026 and OnPace Running on October 7, 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.*