# Red Diary vs Quantum Self

The clearest difference is in-app purchases: Quantum Self at none against Red Diary's 2. Quantum Self also leads on iOS requirement (15.1 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. Red Diary sells 2 in-app purchases, starting at $0.99 per month. Quantum Self asks for nothing beyond the download.

## The numbers

| Metric | Red Diary | Quantum Self |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (9 ratings)](https://appshunter.io/ios/app/red-diary-period-tracker/id6767368239/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 days | — |
| Monetization | Freemium | — |
| Size | 8 MB | 139 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [RUBINS DORMEUS](https://appshunter.io/developer/1884865930) | [Nathan Carter](https://appshunter.io/developer/6818298879) |

## What reviewers say

### Red Diary

[App page](https://appshunter.io/ios/app/red-diary-period-tracker/id6767368239)

This app analyzes your symptoms, mood, energy, sleep, and activity to provide personalized insights and daily guidance tailored to your cycle phases. It offers a body weather forecast and smart recommendations for exercise, nutrition, and self-care.

**Highlights:** Personalized cycle insights, Smart daily guidance, Body weather forecast, Cycle tracking modes (fertility, pregnancy, birth control), Symptom and mood logging, HealthKit integration, Apple Watch companion app

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $0.99 | per month |
| Premium Annual | $4.99 | per year |


### Quantum Self

[App page](https://appshunter.io/ios/app/quantum-self/id6818298577)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Red Diary free?

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

### Is Quantum Self free?

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

### Do Red Diary or Quantum Self have ads?

Neither Red Diary nor Quantum Self shows ads.

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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.*