# RollerTruck vs Unit Converter for Physics

The clearest difference is in-app purchases: RollerTruck at none against Unit Converter for Physics's 1. RollerTruck also leads on iOS requirement (15 vs 18.6). Unit Converter for Physics's advantage is update cadence (every 10 days vs every 3 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Unit Converter for Physics sells 1 one-off in-app purchase. RollerTruck asks for nothing beyond the download.

RollerTruck ships an update every 3 weeks, Unit Converter for Physics every 10 days. The most recent releases landed on October 9, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | RollerTruck | Unit Converter for Physics |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 10 days** |
| Size | 98 MB | 2 MB |
| Requires iOS | **15** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Watcharin Kanchanarittikrai](https://appshunter.io/developer/1611052749) | [Jatuphol Jaturapat](https://appshunter.io/developer/1788860463) |

## What reviewers say

### RollerTruck

[App page](https://appshunter.io/ios/app/rollertruck/id1611052747)

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

**In-app purchases:** none


### Unit Converter for Physics

[App page](https://appshunter.io/ios/app/unit-converter-for-physics/id6745997040)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Solution | $0.99 | one-time |


## Frequently asked questions

### Is RollerTruck free?

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

### Is Unit Converter for Physics free?

Unit Converter for Physics is free to download, with in-app purchases available.

### Do RollerTruck or Unit Converter for Physics have ads?

Neither RollerTruck nor Unit Converter for Physics shows ads.

### Which is updated more often, RollerTruck or Unit Converter for Physics?

RollerTruck ships an update every 3 weeks, and Unit Converter for Physics every 10 days. Most recently, RollerTruck was updated on October 9, 2026 and Unit Converter for Physics on October 24, 2026.

---

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