# Dermathority vs Haarmode Petra

Dermathority and Haarmode Petra are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Dermathority ships an update every 3 weeks, Haarmode Petra every 2 weeks. The most recent releases landed on September 28, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Dermathority | Haarmode Petra |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Size | 71 MB | 83 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Authic Labs B.V.](https://appshunter.io/developer/1786546025) | [Haarmode Petra BV](https://appshunter.io/developer/1885812583) |

## What reviewers say

### Dermathority

[App page](https://appshunter.io/ios/app/dermathority/id6743939149)

**In-app purchases:** none


### Haarmode Petra

[App page](https://appshunter.io/ios/app/haarmode-petra/id6760703404)

**Features:** Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Dermathority free?

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

### Is Haarmode Petra free?

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

### Do Dermathority or Haarmode Petra have ads?

Neither Dermathority nor Haarmode Petra shows ads.

### Which is updated more often, Dermathority or Haarmode Petra?

Dermathority ships an update every 3 weeks, and Haarmode Petra every 2 weeks. Most recently, Dermathority was updated on September 28, 2026 and Haarmode Petra on September 26, 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.*