# Mental Math vs HDS Academic

The clearest difference is in-app purchases: HDS Academic at none against Mental Math's 10. HDS Academic also leads on iOS requirement (15.0 vs 17.1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Mental Math sells 10 in-app purchases, starting at $4.99 per 7 days. HDS Academic asks for nothing beyond the download.

Mental Math ships an update every 3 weeks, HDS Academic fortnightly. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Mental Math | HDS Academic |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/mental-math-mathee/id6502719157/reviews)** | — |
| Number of ratings | **5** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Size | 28 MB | 34 MB |
| Requires iOS | 17.1 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Andrey Lebedev](https://appshunter.io/developer/636486462) | [Mohamed Salem](https://appshunter.io/developer/1697297413) |

## What reviewers say

### Mental Math

[App page](https://appshunter.io/ios/app/mental-math-mathee/id6502719157)

Enhance your arithmetic abilities with daily math challenges. This app offers over 30 difficulty levels, personalized exercises, and progress tracking to help users of all ages improve their calculation speed and accuracy.

**Highlights:** 30+ difficulty levels, Personalized exercises, Progress tracking, Quick sessions, User-friendly design, Engaging and interactive

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Plus | $4.99 | per 7 days |
| Premium Plus | $4.99 | per 7 days |
| Premium Plus | $5.99 | per month |
| Premium Plus | $11.99 | per 3 months |
| Premium Plus | $14.99 | per year |
| Premium Plus | $17.49 | per year |
| Premium Plus | $24.99 | per year |
| Premium Plus | $24.99 | per year |
| Premium Plus | $39.99 | per year |
| Premium Plus | $39.99 | one-time |


### HDS Academic

[App page](https://appshunter.io/ios/app/hds-academic/id6753149914)

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

**In-app purchases:** none


## Frequently asked questions

### Is Mental Math free?

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

### Is HDS Academic free?

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

### Do Mental Math or HDS Academic have ads?

Neither Mental Math nor HDS Academic shows ads.

### Which is updated more often, Mental Math or HDS Academic?

Mental Math ships an update every 3 weeks, and HDS Academic fortnightly. Most recently, Mental Math was updated on November 4, 2026 and HDS Academic on October 30, 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.*