# CS Revision vs A

The clearest difference is price: CS Revision at Free against A's $0.99. A's advantage is iOS requirement (15.1 vs 26.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

CS Revision is free to download; A costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

CS Revision ships an update every 34 months, A every 39 months. The most recent releases landed on October 8, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | CS Revision | A |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/cs-revision/id1555862527/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 34 months** | Every 39 months |
| Monetization | Free | — |
| Size | 15 MB | 22 MB |
| Requires iOS | 26.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Grigor Dochev](https://appshunter.io/developer/1459885994) | [Saman Wijenayake](https://appshunter.io/developer/1553615257) |

## What reviewers say

### CS Revision

[App page](https://appshunter.io/ios/app/cs-revision/id1555862527)

This app provides revision notes, code snippets, and diagrams for International Baccalaureate Computer Science students. It includes practice questions, progress tracking, and a forum for discussion and motivation.

**Highlights:** Revision notes, Code snippets and diagrams, Progress tracking, MCQ and exam-style practice questions, Discussion forum, Friend motivation features

**Features:** macOS Compatibility, Family Sharing

**In-app purchases:** none


### A

[App page](https://appshunter.io/ios/app/a-level-computer-pro/id1624451572)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CS Revision free?

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

### Is A free?

A costs $0.99, with no in-app purchases.

### Do CS Revision or A have ads?

Neither CS Revision nor A shows ads.

### Which is updated more often, CS Revision or A?

CS Revision ships an update every 34 months, and A every 39 months. Most recently, CS Revision was updated on October 8, 2026 and A 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.*