# Numina vs Double Digits

The clearest difference is in-app purchases: Double Digits at none against Numina's 2. Double Digits also leads on update cadence (weekly vs every 2 months). Numina's advantage is device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Numina sells 2 in-app purchases, starting at $8.99 per month. Double Digits asks for nothing beyond the download.

Numina ships an update every 2 months, Double Digits weekly. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Numina | Double Digits |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Size | 120 MB | 38 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SVERRE ANKER LARSEN GROENAAS](https://appshunter.io/developer/1891891659) | [shota shimogama](https://appshunter.io/developer/6796290145) |

## What reviewers say

### Numina

[App page](https://appshunter.io/ios/app/numina-learn-mental-math/id6761914306)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Numina PRO | $8.99 | per month |
| Numina PRO | $79.99 | per year |


### Double Digits

[App page](https://appshunter.io/ios/app/double-digits-mental-math/id6796290143)

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

**In-app purchases:** none


## Frequently asked questions

### Is Numina free?

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

### Is Double Digits free?

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

### Do Numina or Double Digits have ads?

Neither Numina nor Double Digits shows ads.

### Which is updated more often, Numina or Double Digits?

Numina ships an update every 2 months, and Double Digits weekly. Most recently, Numina was updated on October 31, 2026 and Double Digits on November 6, 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.*