# KEES Maths vs 990prep

The clearest difference is monetization model: KEES Maths at free against 990prep's freemium. 990prep's advantage is update cadence (every 9 days vs every 6 weeks). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. KEES Maths sells 4 in-app purchases, starting at $8.99 per month and 990prep sells 2 in-app purchases, starting at $44.99 per month. Whichever you choose, the download price is not the number that matters.

KEES Maths ships an update every 6 weeks, 990prep every 9 days. The most recent releases landed on November 2, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | KEES Maths | 990prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/kees-maths/id1369536352/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 9 days** |
| Monetization | **Free** | Freemium |
| Size | 67 MB | 85 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [julien devers](https://appshunter.io/developer/1369536351) | [Justin De Sio](https://appshunter.io/developer/1881405592) |

## What reviewers say

### KEES Maths

[App page](https://appshunter.io/ios/app/kees-maths/id1369536352)

This app acts as a virtual math tutor, available 24/7 to help with exercises. It provides clear explanations, step-by-step guidance, and detailed solutions using powerful algorithms to build confidence in mathematics.

**Highlights:** Virtual math professor, 24/7 availability, Step-by-step problem solving, Clear explanations with diagrams, Algorithmic solutions ('Kees'), Builds math confidence

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mensuel | $8.99 | per month |
| Trimestriel | $22.99 | per 3 months |
| Semestriel | $44.99 | per 6 months |
| Annuel | $79.99 | per year |


### 990prep

[App page](https://appshunter.io/ios/app/990prep-toeic-training/id6759878981)

Prepare for the TOEIC® exam with a comprehensive training app. It offers numerous practice exercises, vocabulary flashcards, and grammar lessons designed to improve your score. Instant feedback helps you learn from mistakes.

**Highlights:** 240 Practice Exercises, 1,000+ Vocabulary Flashcards, 100+ Grammar Lessons, Instant Corrections, Progress Tracking

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $44.99 | per month |
| Annual Premium | $179.00 | per year |


## Frequently asked questions

### Is KEES Maths free?

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

### Is 990prep free?

990prep is free to download, with in-app purchases available.

### Do KEES Maths or 990prep have ads?

Neither KEES Maths nor 990prep shows ads.

### Which is updated more often, KEES Maths or 990prep?

KEES Maths ships an update every 6 weeks, and 990prep every 9 days. Most recently, KEES Maths was updated on November 2, 2026 and 990prep on November 9, 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.*