# CRYS vs Peter the Protocol Reader

The clearest difference is update cadence: Peter the Protocol Reader at every 3 weeks against CRYS's every 2 months. CRYS's advantage is iOS requirement (12.0 vs 16.0). 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.

CRYS ships an update every 2 months, Peter the Protocol Reader every 3 weeks. The most recent releases landed on October 9, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | CRYS | Peter the Protocol Reader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/peter-the-protocol-reader/id6754336090/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 85 MB | 108 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 17+ |
| Developer | [ERT,INC](https://appshunter.io/developer/1160214546) | [Care Access](https://appshunter.io/developer/1889628360) |

## What reviewers say

### CRYS

[App page](https://appshunter.io/ios/app/crys-301-302/id6742195649)

**In-app purchases:** none


### Peter the Protocol Reader

[App page](https://appshunter.io/ios/app/peter-the-protocol-reader/id6754336090)

This AI assistant streamlines clinical research by quickly converting protocols into actionable insights. It's designed to enhance the quality and efficiency of research delivery for clinical sites.

**Highlights:** Protocol to practical insights, AI-powered assistance, High-quality research delivery, Secure and trusted, Confidence in research

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

**In-app purchases:** none


## Frequently asked questions

### Is CRYS free?

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

### Is Peter the Protocol Reader free?

Peter the Protocol Reader is free to download, with no in-app purchases.

### Do CRYS or Peter the Protocol Reader have ads?

Neither CRYS nor Peter the Protocol Reader shows ads.

### Which is updated more often, CRYS or Peter the Protocol Reader?

CRYS ships an update every 2 months, and Peter the Protocol Reader every 3 weeks. Most recently, CRYS was updated on October 9, 2026 and Peter the Protocol Reader on October 5, 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.*