# Prof Billal vs Dafaa

The clearest difference is update cadence: Dafaa at every 2 days against Prof Billal's every 2 weeks. Prof Billal's advantage is device support (3 vs 1) and iOS requirement (11.0 vs 16.4). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Prof Billal ships an update every 2 weeks, Dafaa every 2 days. The most recent releases landed on November 7, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Prof Billal | Dafaa |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (3 ratings)](https://appshunter.io/ios/app/dafaa-high-school-lessons/id6825998347/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 2 days** |
| Monetization | — | Free |
| Size | 94 MB | 79 MB |
| Requires iOS | **11.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [BILLAL YAHIAOUI](https://appshunter.io/developer/1705609179) | [Dahmani Walid](https://appshunter.io/developer/6825998349) |

## What reviewers say

### Prof Billal

[App page](https://appshunter.io/ios/app/prof-billal/id6464161731)

**Features:** macOS Compatibility

**In-app purchases:** none


### Dafaa

[App page](https://appshunter.io/ios/app/dafaa-high-school-lessons/id6825998347)

This app provides physics and chemistry lessons, step-by-step solved exercises, and interactive simulations for Algerian high school students. It covers the curriculum for various streams and prepares students for exams up to the baccalaureate level. Content is original and follows the Algerian school curriculum.

**Highlights:** Step-by-step solved exercises, Interactive simulations, Clear physics and chemistry lessons, Practice tests and term exams, Offline functionality, Weekly calendar with reminders

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Prof Billal free?

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

### Is Dafaa free?

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

### Do Prof Billal or Dafaa have ads?

Neither Prof Billal nor Dafaa shows ads.

### Which is updated more often, Prof Billal or Dafaa?

Prof Billal ships an update every 2 weeks, and Dafaa every 2 days. Most recently, Prof Billal was updated on November 7, 2026 and Dafaa on November 10, 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.*