# CrystalGen vs JuLearn

The clearest difference is update cadence: JuLearn at every 2 months against CrystalGen's every 38 months. JuLearn also leads on iOS requirement (15.1 vs 17.2). CrystalGen's advantage is price ($2.99 vs $5.99). On ads, in-app purchases and device support there is nothing between them.

CrystalGen costs $2.99 and JuLearn $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

CrystalGen ships an update every 38 months, JuLearn every 2 months. The most recent releases landed on October 19, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | CrystalGen | JuLearn |
| --- | --- | --- |
| Price | **$2.99** | $5.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 2 months** |
| Monetization | — | Paid |
| Size | 3 MB | 57 MB |
| Requires iOS | 17.2 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Steve Kliewer](https://appshunter.io/developer/1255655631) | [SimTeCon GmbH](https://appshunter.io/developer/1761797043) |

## What reviewers say

### CrystalGen

[App page](https://appshunter.io/ios/app/crystalgen/id1589074466)

**Features:** macOS Compatibility

**In-app purchases:** none


### JuLearn

[App page](https://appshunter.io/ios/app/julearn/id6740006034)

Master Julia programming with a comprehensive, offline learning path. Covers fundamentals to advanced scientific computing and metaprogramming through structured units, coding exercises, and flashcards. Ideal for developers, scientists, and data analysts.

**Highlights:** 12 in-depth learning units, 70 coding exercises per unit, Julia Cheatsheet, Julia & TensorFlow Flashcards, Progress tracking, Full offline access, Daily coding challenges

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

**In-app purchases:** none


## Frequently asked questions

### Is CrystalGen free?

CrystalGen costs $2.99, with no in-app purchases.

### Is JuLearn free?

JuLearn costs $5.99, with no in-app purchases.

### Do CrystalGen or JuLearn have ads?

Neither CrystalGen nor JuLearn shows ads.

### Which is updated more often, CrystalGen or JuLearn?

CrystalGen ships an update every 38 months, and JuLearn every 2 months. Most recently, CrystalGen was updated on October 19, 2026 and JuLearn on October 6, 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.*