# KoboX Mobile vs ₿21

The clearest difference is update cadence: ₿21 at every 8 days against KoboX Mobile's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

KoboX Mobile ships an update every 3 weeks, ₿21 every 8 days. Both last shipped on October 18, 2026.

## The numbers

| Metric | KoboX Mobile | ₿21 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 8 days** |
| Size | 132 MB | 11 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [KoboX Ltd](https://appshunter.io/developer/1855278580) | [Paxa Media](https://appshunter.io/developer/6775532265) |

## What reviewers say

### KoboX Mobile

[App page](https://appshunter.io/ios/app/kobox-mobile/id6755651601)

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

**In-app purchases:** none


### ₿21

[App page](https://appshunter.io/ios/app/21-bitcoin-wallet/id6804453821)

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

**In-app purchases:** none


## Frequently asked questions

### Is KoboX Mobile free?

KoboX Mobile is free to download, with no in-app purchases.

### Is ₿21 free?

₿21 is free to download, with no in-app purchases.

### Do KoboX Mobile or ₿21 have ads?

Neither KoboX Mobile nor ₿21 shows ads.

### Which is updated more often, KoboX Mobile or ₿21?

KoboX Mobile ships an update every 3 weeks, and ₿21 every 8 days. Most recently, KoboX Mobile was updated on October 18, 2026 and ₿21 on October 18, 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.*