# Bitsby vs CS Revision

The clearest difference is update cadence: Bitsby at monthly against CS Revision's every 34 months. Bitsby also leads on iOS requirement (13.0 vs 26.0). 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.

Bitsby ships an update monthly, CS Revision every 34 months. The most recent releases landed on October 25, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Bitsby | CS Revision |
| --- | --- | --- |
| Price | Free | Free |
| 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 | **Monthly** | Every 34 months |
| Monetization | — | Free |
| Size | 10 MB | 15 MB |
| Requires iOS | **13.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Planetbeyond](https://appshunter.io/developer/1463932388) | [Grigor Dochev](https://appshunter.io/developer/1459885994) |

## What reviewers say

### Bitsby

[App page](https://appshunter.io/ios/app/bitsby-gcse-cs-chatbot/id1491437242)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Bitsby free?

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

### Is CS Revision free?

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

### Do Bitsby or CS Revision have ads?

Neither Bitsby nor CS Revision shows ads.

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

Bitsby ships an update monthly, and CS Revision every 34 months. Most recently, Bitsby was updated on October 25, 2026 and CS Revision on October 8, 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.*