# ガチ2桁九九 vs Double Digits

The clearest difference is in-app purchases: Double Digits at none against ガチ2桁九九's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. ガチ2桁九九 sells 1 one-off in-app purchase. Double Digits asks for nothing beyond the download.

ガチ2桁九九 ships an update every 2 months, Double Digits every 5 weeks. The most recent releases landed on October 14, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | ガチ2桁九九 | Double Digits |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Size | 24 MB | 28 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [kotobaz](https://appshunter.io/developer/1634727152) | [shota shimogama](https://appshunter.io/developer/6796290145) |

## What reviewers say

### ガチ2桁九九

[App page](https://appshunter.io/ios/app/2/id6777702804)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアム解放 | $2.99 | one-time |


### Double Digits

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

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

**In-app purchases:** none


## Frequently asked questions

### Is ガチ2桁九九 free?

ガチ2桁九九 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 ガチ2桁九九 or Double Digits have ads?

Neither ガチ2桁九九 nor Double Digits shows ads.

### Which is updated more often, ガチ2桁九九 or Double Digits?

ガチ2桁九九 ships an update every 2 months, and Double Digits every 5 weeks. Most recently, ガチ2桁九九 was updated on October 14, 2026 and Double Digits on October 11, 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.*