# Math Queen / Math King vs Rock Identifier AI

The clearest difference is in-app purchases: Math Queen / Math King at none against Rock Identifier AI's 3. Rock Identifier AI's advantage is update cadence (every 3 months vs every 30 months) and iOS requirement (15.6 vs 26.0). On price, ads and device support there is nothing between them.

Both are free to download. Rock Identifier AI sells 3 in-app purchases, starting at $3.99 per 7 days. Math Queen / Math King asks for nothing beyond the download.

Math Queen / Math King ships an update every 30 months, Rock Identifier AI every 3 months. The most recent releases landed on October 20, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Math Queen / Math King | Rock Identifier AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (18 ratings)](https://appshunter.io/ios/app/rock-identifier-ai-gem-stone/id6747914442/reviews)** |
| Number of ratings | — | **18** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 30 months | **Every 3 months** |
| Monetization | — | Free with in-app purchases |
| Size | 11 MB | 91 MB |
| Requires iOS | 26.0 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gerhard Lentschik](https://appshunter.io/developer/629988041) | [Stephen Kuyper](https://appshunter.io/developer/1699577318) |

## What reviewers say

### Math Queen / Math King

[App page](https://appshunter.io/ios/app/math-queen-math-king/id6477328464)

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

**In-app purchases:** none


### Rock Identifier AI

[App page](https://appshunter.io/ios/app/rock-identifier-ai-gem-stone/id6747914442)

Instantly identify rocks, minerals, gemstones, and crystals by snapping a photo. Get detailed information on their origins, properties, and history. Organize your discoveries with a personal collection manager and access saved identifications offline.

**Highlights:** Instant rock and stone identification via camera, Detailed gemstone and crystal information, Historical and geological insights, Personal collection manager, Offline access to saved identifications

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Plan without Free Trial | $3.99 | per 7 days |
| Weekly Subscription | $4.99 | per 7 days |
| Yearly Subscriptions | $49.99 | per year |


## Frequently asked questions

### Is Math Queen / Math King free?

Math Queen / Math King is free to download, with no in-app purchases.

### Is Rock Identifier AI free?

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

### Do Math Queen / Math King or Rock Identifier AI have ads?

Neither Math Queen / Math King nor Rock Identifier AI shows ads.

### Which is updated more often, Math Queen / Math King or Rock Identifier AI?

Math Queen / Math King ships an update every 30 months, and Rock Identifier AI every 3 months. Most recently, Math Queen / Math King was updated on October 20, 2026 and Rock Identifier AI 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.*