# Author BT Update vs ADONN

The clearest difference is update cadence: Author BT Update at monthly against ADONN's every 4 months. ADONN's advantage is iOS requirement (11.0 vs 16.0). 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.

Author BT Update ships an update monthly, ADONN every 4 months. The most recent releases landed on September 8, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Author BT Update | ADONN |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 4 months |
| Size | 4 MB | 18 MB |
| Requires iOS | 16.0 | **11.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [AUTHOR-ALARM](https://appshunter.io/developer/1344731145) | [wei lyu](https://appshunter.io/developer/1788851158) |

## What reviewers say

### Author BT Update

[App page](https://appshunter.io/ios/app/author-bt-update/id6475983875)

**Features:** macOS Compatibility

**In-app purchases:** none


### ADONN

[App page](https://appshunter.io/ios/app/adonn/id6740195253)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Author BT Update free?

Author BT Update is free to download, with no in-app purchases.

### Is ADONN free?

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

### Do Author BT Update or ADONN have ads?

Neither Author BT Update nor ADONN shows ads.

### Which is updated more often, Author BT Update or ADONN?

Author BT Update ships an update monthly, and ADONN every 4 months. Most recently, Author BT Update was updated on September 8, 2026 and ADONN on September 19, 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.*