# Diooist vs PDF Compact

The clearest difference is iOS requirement: Diooist at 11.0 against PDF Compact's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Diooist ships an update every 3 months, PDF Compact every 5 months. The most recent releases landed on October 3, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Diooist | PDF Compact |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 5 months |
| Size | 56 MB | 22 MB |
| Requires iOS | **11.0** | 26.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [子昂 李](https://appshunter.io/developer/1741659620) | [Gerhard Lentschik](https://appshunter.io/developer/629988041) |

## What reviewers say

### Diooist

[App page](https://appshunter.io/ios/app/diooist/id6499391524)

**Features:** macOS Compatibility

**In-app purchases:** none


### PDF Compact

[App page](https://appshunter.io/ios/app/pdf-compact/id6757109481)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Diooist free?

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

### Is PDF Compact free?

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

### Do Diooist or PDF Compact have ads?

Neither Diooist nor PDF Compact shows ads.

### Which is updated more often, Diooist or PDF Compact?

Diooist ships an update every 3 months, and PDF Compact every 5 months. Most recently, Diooist was updated on October 3, 2026 and PDF Compact on September 28, 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.*