# hello again vs TwentyOne

The clearest difference is ads: TwentyOne at none against hello again's shown. TwentyOne also leads on iOS requirement (13.0 vs 15.1). hello again's advantage is update cadence (every 3 weeks 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.

hello again ships an update every 3 weeks, TwentyOne every 2 months. The most recent releases landed on October 8, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | hello again | TwentyOne |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Size | 56 MB | 98 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [hello again GmbH](https://appshunter.io/developer/1219689113) | [Pocket House GmbH](https://appshunter.io/developer/1450647392) |

## What reviewers say

### hello again

[App page](https://appshunter.io/ios/app/hello-again/id1621523707)

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

**In-app purchases:** none


### TwentyOne

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

**Features:** Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is hello again free?

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

### Is TwentyOne free?

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

### Do hello again or TwentyOne have ads?

hello again shows ads; TwentyOne does not.

### Which is updated more often, hello again or TwentyOne?

hello again ships an update every 3 weeks, and TwentyOne every 2 months. Most recently, hello again was updated on October 8, 2026 and TwentyOne on October 2, 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.*