# eWCAT vs Roscoe Moss Calculator App

The clearest difference is update cadence: eWCAT at every 3 weeks against Roscoe Moss Calculator App's every 4 months. eWCAT also leads on iOS requirement (9.0 vs 16.6). 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.

eWCAT ships an update every 3 weeks, Roscoe Moss Calculator App every 4 months. The most recent releases landed on October 27, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | eWCAT | Roscoe Moss Calculator App |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 months |
| Size | 41 MB | 21 MB |
| Requires iOS | **9.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Eraze Computer Software B.V.](https://appshunter.io/developer/1619076012) | [Roscoe Moss Manufacturing Company](https://appshunter.io/developer/1138080217) |

## What reviewers say

### eWCAT

[App page](https://appshunter.io/ios/app/ewcat/id1619076010)

**Features:** macOS Compatibility

**In-app purchases:** none


### Roscoe Moss Calculator App

[App page](https://appshunter.io/ios/app/roscoe-moss-calculator-app/id1644445889)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is eWCAT free?

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

### Is Roscoe Moss Calculator App free?

Roscoe Moss Calculator App is free to download, with no in-app purchases.

### Do eWCAT or Roscoe Moss Calculator App have ads?

Neither eWCAT nor Roscoe Moss Calculator App shows ads.

### Which is updated more often, eWCAT or Roscoe Moss Calculator App?

eWCAT ships an update every 3 weeks, and Roscoe Moss Calculator App every 4 months. Most recently, eWCAT was updated on October 27, 2026 and Roscoe Moss Calculator App on November 3, 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.*