# Auer Circle vs Red Diary

The clearest difference is in-app purchases: Auer Circle at none against Red Diary's 2. Red Diary's advantage is update cadence (every 3 days vs every 11 months) and ratings volume (9 vs 1). On price, rating, 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. Auer Circle asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Auer Circle against 5.0 for Red Diary. That said, the two scores are not equally well evidenced: Red Diary has 9 ratings behind it against 1, so its average is the more settled of the two.

Auer Circle ships an update every 11 months, Red Diary every 3 days. The most recent releases landed on October 30, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Auer Circle | Red Diary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/auer-circle/id6740163992/reviews) | [5.0 (9 ratings)](https://appshunter.io/ios/app/red-diary-period-tracker/id6767368239/reviews) |
| Number of ratings | 1 | **9** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 3 days** |
| Monetization | **Free** | Freemium |
| Size | 0 MB | 8 MB |
| Requires iOS | 26.6 | **17.6** |
| Devices | iPhone | **iPhone, Apple Watch** |
| Age rating | 4+ | 12+ |
| Developer | [Uri Fridman](https://appshunter.io/developer/1612958936) | [RUBINS DORMEUS](https://appshunter.io/developer/1884865930) |

## What reviewers say

### Auer Circle

[App page](https://appshunter.io/ios/app/auer-circle/id6740163992)

A minimalist meditation timer designed for simplicity and ease of use. Set your session duration with a tap and begin your practice. Track your meditation sessions daily.

**Highlights:** Minimalist interface, Easy session duration selection, One-tap start, Daily session tracking, Simple design

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Auer Circle free?

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

### Is Red Diary free?

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

### Which has better reviews, Auer Circle or Red Diary?

Auer Circle and Red Diary are both rated 5.0 out of 5 on the App Store, from 1 and 9 ratings respectively.

### Do Auer Circle or Red Diary have ads?

Neither Auer Circle nor Red Diary shows ads.

### Which is updated more often, Auer Circle or Red Diary?

Auer Circle ships an update every 11 months, and Red Diary every 3 days. Most recently, Auer Circle was updated on October 30, 2026 and Red Diary on October 16, 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.*