# S4S App vs OpositorPro

The clearest difference is update cadence: OpositorPro at daily against S4S App's every 3 months. S4S App's advantage is iOS requirement (13.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

S4S App ships an update every 3 months, OpositorPro daily. The most recent releases landed on October 25, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | S4S App | OpositorPro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Daily** |
| Size | 195 MB | 56 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [S4S Preparación Física SL](https://appshunter.io/developer/1862744402) | [Akros Training](https://appshunter.io/developer/1481072296) |

## What reviewers say

### S4S App

[App page](https://appshunter.io/ios/app/s4s-app/id6756779707)

**Features:** macOS Compatibility

**In-app purchases:** none


### OpositorPro

[App page](https://appshunter.io/ios/app/opositorpro/id6760829847)

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

**In-app purchases:** none


## Frequently asked questions

### Is S4S App free?

S4S App is free to download, with no in-app purchases.

### Is OpositorPro free?

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

### Do S4S App or OpositorPro have ads?

Neither S4S App nor OpositorPro shows ads.

### Which is updated more often, S4S App or OpositorPro?

S4S App ships an update every 3 months, and OpositorPro daily. Most recently, S4S App was updated on October 25, 2026 and OpositorPro on October 17, 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.*