# Crystal Identifier Rock guide vs AI Math Helper－Problem Solver

The clearest difference is update cadence: AI Math Helper－Problem Solver at fortnightly against Crystal Identifier Rock guide's every 3 months. Crystal Identifier Rock guide's advantage is iOS requirement (13.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Crystal Identifier Rock guide sells 2 in-app purchases, starting at $4.99 per 7 days and AI Math Helper－Problem Solver sells 2 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Crystal Identifier Rock guide ships an update every 3 months, AI Math Helper－Problem Solver fortnightly. The most recent releases landed on October 4, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Crystal Identifier Rock guide | AI Math Helper－Problem Solver |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Size | 34 MB | 6 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Semen Sharyhin](https://appshunter.io/developer/1463206827) | [Rudenko Andrii](https://appshunter.io/developer/1858246209) |

## What reviewers say

### Crystal Identifier Rock guide

[App page](https://appshunter.io/ios/app/crystal-identifier-rock-guide/id6737513257)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Crystal Identifier Weekly | $4.99 | per 7 days |
| Crystal Identifier Yearly | $24.99 | per year |


### AI Math Helper－Problem Solver

[App page](https://appshunter.io/ios/app/ai-math-helperproblem-solver/id6760292022)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Math Helper Premium | $2.99 | per 7 days |
| Math Helper Premium | $24.99 | per year |


## Frequently asked questions

### Is Crystal Identifier Rock guide free?

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

### Is AI Math Helper－Problem Solver free?

AI Math Helper－Problem Solver is free to download, with in-app purchases available.

### Do Crystal Identifier Rock guide or AI Math Helper－Problem Solver have ads?

Neither Crystal Identifier Rock guide nor AI Math Helper－Problem Solver shows ads.

### Which is updated more often, Crystal Identifier Rock guide or AI Math Helper－Problem Solver?

Crystal Identifier Rock guide ships an update every 3 months, and AI Math Helper－Problem Solver fortnightly. Most recently, Crystal Identifier Rock guide was updated on October 4, 2026 and AI Math Helper－Problem Solver on October 14, 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.*