# AttendBook vs BitsReader

The clearest difference is in-app purchases: AttendBook at none against BitsReader's 2. BitsReader's advantage is iOS requirement (16.6 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. BitsReader sells 2 in-app purchases, starting at $4.99 per month. AttendBook asks for nothing beyond the download.

AttendBook ships an update every 3 months, BitsReader every 2 months. The most recent releases landed on September 10, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | AttendBook | BitsReader |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Every 2 months** |
| Size | 11 MB | 182 MB |
| Requires iOS | 18.0 | **16.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [hiromu izuwa](https://appshunter.io/developer/599721911) | [Joel Caetano](https://appshunter.io/developer/1510243085) |

## What reviewers say

### AttendBook

[App page](https://appshunter.io/ios/app/attendbook/id6754966785)

**Features:** macOS Compatibility

**In-app purchases:** none


### BitsReader

[App page](https://appshunter.io/ios/app/bitsreader/id6755438235)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro | $4.99 | per month |
| Yearly Pro | $39.99 | per year |


## Frequently asked questions

### Is AttendBook free?

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

### Is BitsReader free?

BitsReader is free to download, with in-app purchases available.

### Do AttendBook or BitsReader have ads?

Both AttendBook and BitsReader show ads.

### Which is updated more often, AttendBook or BitsReader?

AttendBook ships an update every 3 months, and BitsReader every 2 months. Most recently, AttendBook was updated on September 10, 2026 and BitsReader 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.*