# S vs Physics. Trainer App

The clearest difference is in-app purchases: S at none against Physics. Trainer App's 2. S also leads on ads (none vs shown) and device support (3 vs 1). Physics. Trainer App's advantage is update cadence (weekly vs every 9 months). On price there is nothing between them.

Both are free to download. Physics. Trainer App sells 2 in-app purchases, starting at $2.99 per year. S asks for nothing beyond the download.

S ships an update every 9 months, Physics. Trainer App weekly. The most recent releases landed on September 23, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | S | Physics. Trainer App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/physics-trainer-app/id6753603866/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 9 months | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 15 MB | 32 MB |
| Requires iOS | **9.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 9+ |
| Developer | [NALO Solutions Limited](https://appshunter.io/developer/1458642654) | [Blatt, Inc](https://appshunter.io/developer/1779835943) |

## What reviewers say

### S

[App page](https://appshunter.io/ios/app/s-buddy/id1458642655)

**Features:** macOS Compatibility

**In-app purchases:** none


### Physics. Trainer App

[App page](https://appshunter.io/ios/app/physics-trainer-app/id6753603866)

Master physics formulas with this app designed for high school students. Practice with spaced repetition and track your progress to build long-term memory and exam confidence.

**Highlights:** Comprehensive formula bank, Spaced repetition trainer, Adaptive learning, Progress tracking, Formula building exercises

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium access | $2.99 | per year |
| Removing ads | $2.99 | one-time |


## Frequently asked questions

### Is S free?

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

### Is Physics. Trainer App free?

Physics. Trainer App is free to download, with in-app purchases available.

### Do S or Physics. Trainer App have ads?

Physics. Trainer App shows ads; S does not.

### Which is updated more often, S or Physics. Trainer App?

S ships an update every 9 months, and Physics. Trainer App weekly. Most recently, S was updated on September 23, 2026 and Physics. Trainer App on September 26, 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.*