# Perlim vs TurtleBook

The clearest difference is update cadence: TurtleBook at every 10 days against Perlim's every 12 months. 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.

Perlim ships an update every 12 months, TurtleBook every 10 days. The most recent releases landed on September 9, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Perlim | TurtleBook |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 10 days** |
| Size | 23 MB | 33 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Feira Viva Cultura e Desporto e.m.](https://appshunter.io/developer/1131074500) | [WebTurtle](https://appshunter.io/developer/1635823953) |

## What reviewers say

### Perlim

[App page](https://appshunter.io/ios/app/perlim/id1175012080)

**Features:** macOS Compatibility

**In-app purchases:** none


### TurtleBook

[App page](https://appshunter.io/ios/app/turtlebook/id1526314751)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Perlim free?

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

### Is TurtleBook free?

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

### Do Perlim or TurtleBook have ads?

Neither Perlim nor TurtleBook shows ads.

### Which is updated more often, Perlim or TurtleBook?

Perlim ships an update every 12 months, and TurtleBook every 10 days. Most recently, Perlim was updated on September 9, 2026 and TurtleBook on September 18, 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.*