# ISM vs Rock Identifier

The clearest difference is in-app purchases: ISM at none against Rock Identifier's 2. ISM also leads on device support (3 vs 1) and iOS requirement (12.0 vs 17.0). On price, update cadence and ads there is nothing between them.

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

ISM ships an update every 7 months, Rock Identifier every 9 months. The most recent releases landed on October 23, 2026 and December 28, 2025 respectively.

## The numbers

| Metric | ISM | Rock Identifier |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (9 ratings)](https://appshunter.io/ios/app/ism-wf200/id6698873286/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 7 months** | Every 9 months |
| Monetization | Free | — |
| Size | 2 MB | 32 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Insize Co., Ltd.](https://appshunter.io/developer/1489274019) | [Enes Bugra Yenidunya](https://appshunter.io/developer/1536335739) |

## What reviewers say

### ISM

[App page](https://appshunter.io/ios/app/ism-wf200/id6698873286)

Explore the microscopic world with a WiFi digital microscope. Capture images, record videos, and perform measurements. Ideal for educational, research, and hobbyist use.

**Highlights:** Microscopic observation, Image capture, Video recording, Measurement tools, WiFi microscope control

**Features:** macOS Compatibility

**In-app purchases:** none


### Rock Identifier

[App page](https://appshunter.io/ios/app/rock-identifier/id6738613853)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Plan | $4.99 | per 7 days |
| Annual Plan | $24.99 | per year |


## Frequently asked questions

### Is ISM free?

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

### Is Rock Identifier free?

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

### Do ISM or Rock Identifier have ads?

Neither ISM nor Rock Identifier shows ads.

### Which is updated more often, ISM or Rock Identifier?

ISM ships an update every 7 months, and Rock Identifier every 9 months. Most recently, ISM was updated on October 23, 2026 and Rock Identifier on December 28, 2025.

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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.*