# copeval PRIME express vs Hydroreader

The clearest difference is in-app purchases: copeval PRIME express at none against Hydroreader's 2. copeval PRIME express also leads on iOS requirement (13.4 vs 15.6). Hydroreader's advantage is update cadence (fortnightly vs every 6 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Hydroreader sells 2 in-app purchases, starting at $0.99 per month. copeval PRIME express asks for nothing beyond the download.

copeval PRIME express ships an update every 6 weeks, Hydroreader fortnightly. The most recent releases landed on September 22, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | copeval PRIME express | Hydroreader |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Fortnightly** |
| Size | 33 MB | 57 MB |
| Requires iOS | **13.4** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Routing SpA](https://appshunter.io/developer/1405253500) | [Cintelli SA](https://appshunter.io/developer/1828195800) |

## What reviewers say

### copeval PRIME express

[App page](https://appshunter.io/ios/app/copeval-prime-express/id1515167875)

**In-app purchases:** none


### Hydroreader

[App page](https://appshunter.io/ios/app/hydroreader/id6748949693)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Suscripción Plan Pro | $0.99 | per month |
| Plan Pro Subscription | $4.99 | per month |


## Frequently asked questions

### Is copeval PRIME express free?

copeval PRIME express is free to download, with no in-app purchases.

### Is Hydroreader free?

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

### Do copeval PRIME express or Hydroreader have ads?

Neither copeval PRIME express nor Hydroreader shows ads.

### Which is updated more often, copeval PRIME express or Hydroreader?

copeval PRIME express ships an update every 6 weeks, and Hydroreader fortnightly. Most recently, copeval PRIME express was updated on September 22, 2026 and Hydroreader on September 10, 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.*