# Membook vs HattiWatt

The clearest difference is update cadence: HattiWatt at every 6 weeks against Membook's every 9 months. Membook's advantage is iOS requirement (12.4 vs 17.6). 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.

Membook ships an update every 9 months, HattiWatt every 6 weeks. The most recent releases landed on October 25, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Membook | HattiWatt |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 6 weeks** |
| Size | 15 MB | 4 MB |
| Requires iOS | **12.4** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Membook Oy](https://appshunter.io/developer/1516613450) | [Pramell](https://appshunter.io/developer/1581797918) |

## What reviewers say

### Membook

[App page](https://appshunter.io/ios/app/membook/id1516613451)

**Features:** macOS Compatibility

**In-app purchases:** none


### HattiWatt

[App page](https://appshunter.io/ios/app/hattiwatt/id6443710171)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Membook free?

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

### Is HattiWatt free?

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

### Do Membook or HattiWatt have ads?

Neither Membook nor HattiWatt shows ads.

### Which is updated more often, Membook or HattiWatt?

Membook ships an update every 9 months, and HattiWatt every 6 weeks. Most recently, Membook was updated on October 25, 2026 and HattiWatt on October 27, 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.*