# Wajibi AI vs Rex

The clearest difference is iOS requirement: Wajibi AI at 15.1 against Rex's 18.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Wajibi AI sells 3 in-app purchases, starting at $3.99 per 7 days and Rex sells 2 in-app purchases, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.

Wajibi AI ships an update every 4 days, Rex weekly. Both last shipped on October 31, 2026.

## The numbers

| Metric | Wajibi AI | Rex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rex-study-smarter/id6775703977/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Weekly |
| Monetization | — | Free with in-app purchases |
| Size | 52 MB | 108 MB |
| Requires iOS | **15.1** | 18.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 12+ |
| Developer | [Mohamed Amine Nouhi](https://appshunter.io/developer/1887071461) | [Oran Egbuchunam](https://appshunter.io/developer/6775544967) |

## What reviewers say

### Wajibi AI

[App page](https://appshunter.io/ios/app/wajibi-ai-arabic-homework/id6772748081)

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Wajibi AI Pro | $3.99 | per 7 days |
| Wajibi AI Pro | $9.99 | per month |
| Wajibi AI Pro | $49.99 | per year |


### Rex

[App page](https://appshunter.io/ios/app/rex-study-smarter/id6775703977)

This app offers an interactive learning experience by explaining concepts aloud and allowing users to manipulate 3D models and live charts. It consolidates notes, PDFs, and web research onto a single canvas and supports collaborative study sessions.

**Highlights:** Voice explanations of questions, Interactive 3D scenes and live charts, Consolidated study canvas, Lecture transcription and note-taking, Read-aloud functionality for notes and PDFs, Language practice with real scenes, Live collaborative study boards

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $12.99 | per month |
| Rex Pro Annual | $99.99 | per year |


## Frequently asked questions

### Is Wajibi AI free?

Wajibi AI is free to download, with in-app purchases available.

### Is Rex free?

Rex is free to download, with in-app purchases available.

### Do Wajibi AI or Rex have ads?

Neither Wajibi AI nor Rex shows ads.

### Which is updated more often, Wajibi AI or Rex?

Wajibi AI ships an update every 4 days, and Rex weekly. Most recently, Wajibi AI was updated on October 31, 2026 and Rex on October 31, 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.*