# Instant Math Cards vs Gem Identifier & Rock ID

The clearest difference is ads: Instant Math Cards at none against Gem Identifier & Rock ID's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Instant Math Cards sells 1 one-off in-app purchase and Gem Identifier & Rock ID sells 5 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Instant Math Cards ships an update every 3 weeks, Gem Identifier & Rock ID monthly. Both last shipped on October 24, 2026.

## The numbers

| Metric | Instant Math Cards | Gem Identifier & Rock ID |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (24 ratings)](https://appshunter.io/ios/app/gem-identifier-and-rock-id/id6748907151/reviews)** |
| Number of ratings | — | **24** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | — | Free with in-app purchases |
| Size | 14 MB | 36 MB |
| Requires iOS | 17.5 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Jackson Dow](https://appshunter.io/developer/1748049151) | [Innotent LTD](https://appshunter.io/developer/1695717745) |

## What reviewers say

### Instant Math Cards

[App page](https://appshunter.io/ios/app/instant-math-cards/id6553973433)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Features Access | $2.99 | one-time |


### Gem Identifier & Rock ID

[App page](https://appshunter.io/ios/app/gem-identifier-and-rock-id/id6748907151)

Identify rocks, gems, and crystals instantly by taking a photo. Access a comprehensive database with detailed information and authenticate precious stones. Includes a built-in metal detector for further analysis.

**Highlights:** Instant stone identification via photo, Comprehensive stone database, Gem authentication tool, Built-in metal detector, AI recognition technology

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $6.99 | per 7 days |
| Yearly | $19.99 | per year |
| Yearly, 3 Days Free Trial | $29.99 | per year |
| Yearly | $29.99 | per year |
| Lifetime | $14.99 | one-time |


## Frequently asked questions

### Is Instant Math Cards free?

Instant Math Cards is free to download, with in-app purchases available.

### Is Gem Identifier & Rock ID free?

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

### Do Instant Math Cards or Gem Identifier & Rock ID have ads?

Gem Identifier & Rock ID shows ads; Instant Math Cards does not.

### Which is updated more often, Instant Math Cards or Gem Identifier & Rock ID?

Instant Math Cards ships an update every 3 weeks, and Gem Identifier & Rock ID monthly. Most recently, Instant Math Cards was updated on October 24, 2026 and Gem Identifier & Rock ID on October 24, 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.*