# PRN Graph vs Topical skin therapy

The clearest difference is iOS requirement: Topical skin therapy at 9.0 against PRN Graph's 16.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

PRN Graph ships an update every 3 months, Topical skin therapy every 2 months. The most recent releases landed on November 1, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | PRN Graph | Topical skin therapy |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Size | 6 MB | 49 MB |
| Requires iOS | 16.0 | **9.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Glamorous Goat B.V.](https://appshunter.io/developer/843276618) | [UMC Utrecht](https://appshunter.io/developer/709401304) |

## What reviewers say

### PRN Graph

[App page](https://appshunter.io/ios/app/prn-graph/id843276615)

**Features:** macOS Compatibility

**In-app purchases:** none


### Topical skin therapy

[App page](https://appshunter.io/ios/app/topical-skin-therapy/id1475771074)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PRN Graph free?

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

### Is Topical skin therapy free?

Topical skin therapy is free to download, with no in-app purchases.

### Do PRN Graph or Topical skin therapy have ads?

Neither PRN Graph nor Topical skin therapy shows ads.

### Which is updated more often, PRN Graph or Topical skin therapy?

PRN Graph ships an update every 3 months, and Topical skin therapy every 2 months. Most recently, PRN Graph was updated on November 1, 2026 and Topical skin therapy on October 29, 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.*