# OTTO app vs Rosacea Diary

The clearest difference is in-app purchases: OTTO app at none against Rosacea Diary's 3. OTTO app also leads on device support (3 vs 1) and iOS requirement (8.0 vs 26.0). Rosacea Diary's advantage is update cadence (every 3 weeks vs every 2 months). On price and ads there is nothing between them.

Both are free to download. Rosacea Diary sells 3 in-app purchases, starting at $1.99 per month. OTTO app asks for nothing beyond the download.

OTTO app ships an update every 2 months, Rosacea Diary every 3 weeks. Both last shipped on October 10, 2026.

## The numbers

| Metric | OTTO app | Rosacea Diary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (6 ratings)](https://appshunter.io/ios/app/rosacea-diary/id1605261439/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | — | 40.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | — | Freemium |
| Size | 9 MB | 17 MB |
| Requires iOS | **8.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Cerevo Inc.](https://appshunter.io/developer/382811503) | [Qantum Dev Labs LLC](https://appshunter.io/developer/1817979663) |

## What reviewers say

### OTTO app

[App page](https://appshunter.io/ios/app/otto-app/id975497444)

**Features:** macOS Compatibility

**In-app purchases:** none


### Rosacea Diary

[App page](https://appshunter.io/ios/app/rosacea-diary/id1605261439)

This app helps individuals manage their rosacea by tracking daily skincare routines, medication, and mood. It aims to provide insights into how lifestyle changes and consistent care can help control symptoms of this skin condition.

**Highlights:** Daily skincare routine tracking, Medication application log, Mood tracking, Symptom flare-up monitoring, Progress insights, Lifestyle impact analysis

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rosacea Diary Premium Monthly | $1.99 | per month |
| Rosacea Diary Premium Yearly | $19.99 | per year |
| Lifetime Subscription | $49.99 | one-time |


## Frequently asked questions

### Is OTTO app free?

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

### Is Rosacea Diary free?

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

### Do OTTO app or Rosacea Diary have ads?

Neither OTTO app nor Rosacea Diary shows ads.

### Which is updated more often, OTTO app or Rosacea Diary?

OTTO app ships an update every 2 months, and Rosacea Diary every 3 weeks. Most recently, OTTO app was updated on October 10, 2026 and Rosacea Diary on October 10, 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.*