# Tư Duy Số vs Math Drill

The clearest difference is in-app purchases: Tư Duy Số at none against Math Drill's 2. Tư Duy Số also leads on device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price and ads there is nothing between them.

Both are free to download. Math Drill sells 2 in-app purchases, starting at $2.99 per 7 days. Tư Duy Số asks for nothing beyond the download.

## The numbers

| Metric | Tư Duy Số | Math Drill |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/tu-duy-so/id6754550082/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Monthly |
| Monetization | Free | — |
| Size | 18 MB | 6 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Do Nam](https://appshunter.io/developer/1848808297) | [Phuc Pham](https://appshunter.io/developer/1893081423) |

## What reviewers say

### Tư Duy Số

[App page](https://appshunter.io/ios/app/tu-duy-so/id6754550082)

Enhance your memory and focus with this brain training game. Challenge yourself to find numbers in ascending order quickly and accurately. It's designed to improve concentration and spatial thinking for users of all ages.

**Highlights:** Short-term memory training, Focus and concentration exercises, Spatial thinking development, Quick reflexes enhancement, Difficulty levels (10-100 numbers), Personal best time tracking, Hint system

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

**In-app purchases:** none


### Math Drill

[App page](https://appshunter.io/ios/app/math-drill-mental-arithmetic/id6771411490)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $2.99 | per 7 days |
| Yearly | $14.99 | per year |


## Frequently asked questions

### Is Tư Duy Số free?

Tư Duy Số is free to download, with no in-app purchases.

### Is Math Drill free?

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

### Do Tư Duy Số or Math Drill have ads?

Neither Tư Duy Số nor Math Drill shows ads.

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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.*