# Ruby Compiler vs Etest CBT

The clearest difference is ads: Ruby Compiler at none against Etest CBT's shown. Ruby Compiler also leads on iOS requirement (12.0 vs 15.0). Etest CBT's advantage is update cadence (fortnightly vs every 2 months). On price, 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.

Ruby Compiler ships an update every 2 months, Etest CBT fortnightly. The most recent releases landed on October 1, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Ruby Compiler | Etest CBT |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Fortnightly** |
| Size | 28 MB | 34 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [OnePercent](https://appshunter.io/developer/1536020418) | [john osakwe](https://appshunter.io/developer/6780077462) |

## What reviewers say

### Ruby Compiler

[App page](https://appshunter.io/ios/app/ruby-compiler-rub-rb-code/id1546362321)

**Features:** macOS Compatibility

**In-app purchases:** none


### Etest CBT

[App page](https://appshunter.io/ios/app/etest-cbt-jamb-practice-2027/id6786427641)

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

**In-app purchases:** none


## Frequently asked questions

### Is Ruby Compiler free?

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

### Is Etest CBT free?

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

### Do Ruby Compiler or Etest CBT have ads?

Etest CBT shows ads; Ruby Compiler does not.

### Which is updated more often, Ruby Compiler or Etest CBT?

Ruby Compiler ships an update every 2 months, and Etest CBT fortnightly. Most recently, Ruby Compiler was updated on October 1, 2026 and Etest CBT 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.*