# UniReader vs ReadPDB

The clearest difference is in-app purchases: ReadPDB at none against UniReader's 3. ReadPDB also leads on update cadence (daily vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. UniReader sells 3 in-app purchases, starting at $1.99 per month. ReadPDB asks for nothing beyond the download.

UniReader ships an update every 3 weeks, ReadPDB daily. The most recent releases landed on October 11, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | UniReader | ReadPDB |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Daily** |
| Size | 19 MB | 13 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Guglielmo Pasa](https://appshunter.io/developer/417854438) | [Jaime Martin Lozano](https://appshunter.io/developer/1766116629) |

## What reviewers say

### UniReader

[App page](https://appshunter.io/ios/app/unireader-multi-format-reader/id6759504986)

**Features:** Family Sharing, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| UniReader Premium Monthly | $1.99 | per month |
| UniReader Premium Yearly | $19.99 | per year |
| UniReader Premium Lifetime | $34.99 | one-time |


### ReadPDB

[App page](https://appshunter.io/ios/app/readpdb/id6797103554)

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

**In-app purchases:** none


## Frequently asked questions

### Is UniReader free?

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

### Is ReadPDB free?

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

### Do UniReader or ReadPDB have ads?

Neither UniReader nor ReadPDB shows ads.

### Which is updated more often, UniReader or ReadPDB?

UniReader ships an update every 3 weeks, and ReadPDB daily. Most recently, UniReader was updated on October 11, 2026 and ReadPDB on October 4, 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.*