# Learnify vs Rock Identifier & Crystal

The clearest difference is in-app purchases: Learnify at none against Rock Identifier & Crystal's 2. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Rock Identifier & Crystal sells 2 in-app purchases, starting at $4.99 per 7 days. Learnify asks for nothing beyond the download.

Learnify ships an update every 2 weeks, Rock Identifier & Crystal every 3 weeks. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Learnify | Rock Identifier & Crystal |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Size | 134 MB | 65 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mohamed Galal Anwar](https://appshunter.io/developer/1709938029) | [NAZLI DIRICAN](https://appshunter.io/developer/1804928773) |

## What reviewers say

### Learnify

[App page](https://appshunter.io/ios/app/learnify-pdf-viewer/id6749200948)

**Features:** macOS Compatibility

**In-app purchases:** none


### Rock Identifier & Crystal

[App page](https://appshunter.io/ios/app/rock-identifier-and-crystal/id6749278398)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Access | $4.99 | per 7 days |
| Lifetime Access | $12.99 | one-time |


## Frequently asked questions

### Is Learnify free?

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

### Is Rock Identifier & Crystal free?

Rock Identifier & Crystal is free to download, with in-app purchases available.

### Do Learnify or Rock Identifier & Crystal have ads?

Neither Learnify nor Rock Identifier & Crystal shows ads.

### Which is updated more often, Learnify or Rock Identifier & Crystal?

Learnify ships an update every 2 weeks, and Rock Identifier & Crystal every 3 weeks. Most recently, Learnify was updated on October 30, 2026 and Rock Identifier & Crystal on October 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.*