# TwentyOne vs Challenge Log

The clearest difference is ads: TwentyOne at none against Challenge Log's shown. TwentyOne also leads on iOS requirement (13.0 vs 15.0). Challenge Log's advantage is update cadence (fortnightly vs every 2 months). On price, 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.

TwentyOne ships an update every 2 months, Challenge Log fortnightly. The most recent releases landed on October 2, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | TwentyOne | Challenge Log |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Fortnightly** |
| Size | 98 MB | 91 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Pocket House GmbH](https://appshunter.io/developer/1450647392) | [YOSHIKI KOKUBO](https://appshunter.io/developer/1496137532) |

## What reviewers say

### TwentyOne

[App page](https://appshunter.io/ios/app/twentyone-das-quartier/id6444344214)

**Features:** Apple Wallet

**In-app purchases:** none


### Challenge Log

[App page](https://appshunter.io/ios/app/challenge-log/id6748856273)

**In-app purchases:** none


## Frequently asked questions

### Is TwentyOne free?

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

### Is Challenge Log free?

Challenge Log is free to download, with no in-app purchases.

### Do TwentyOne or Challenge Log have ads?

Challenge Log shows ads; TwentyOne does not.

### Which is updated more often, TwentyOne or Challenge Log?

TwentyOne ships an update every 2 months, and Challenge Log fortnightly. Most recently, TwentyOne was updated on October 2, 2026 and Challenge Log on October 6, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*