# rotronic vs ColorMetric

The clearest difference is in-app purchases: rotronic at none against ColorMetric's 1. rotronic also leads on iOS requirement (8.1 vs 17.0). ColorMetric's advantage is update cadence (weekly vs monthly). On price, ads and device support there is nothing between them.

Both are free to download. ColorMetric sells 1 in-app purchase, starting at $9.99 per year. rotronic asks for nothing beyond the download.

rotronic ships an update monthly, ColorMetric weekly. The most recent releases landed on October 8, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | rotronic | ColorMetric |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Size | 5 MB | 6 MB |
| Requires iOS | **8.1** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Rotronic AG](https://appshunter.io/developer/1057939250) | [Lance Zukel](https://appshunter.io/developer/1874053672) |

## What reviewers say

### rotronic

[App page](https://appshunter.io/ios/app/rotronic/id1057939251)

**Features:** macOS Compatibility

**In-app purchases:** none


### ColorMetric

[App page](https://appshunter.io/ios/app/colormetric/id6758633408)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ColorMetric Annual Ad Free | $9.99 | per year |


## Frequently asked questions

### Is rotronic free?

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

### Is ColorMetric free?

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

### Do rotronic or ColorMetric have ads?

Neither rotronic nor ColorMetric shows ads.

### Which is updated more often, rotronic or ColorMetric?

rotronic ships an update monthly, and ColorMetric weekly. Most recently, rotronic was updated on October 8, 2026 and ColorMetric on October 11, 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.*