# 마인드 부스터 Blue vs Auer Circle

The clearest difference is iOS requirement: 마인드 부스터 Blue at 13 against Auer Circle's 26.6. On price, update cadence 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.

마인드 부스터 Blue ships an update every 15 months, Auer Circle every 11 months. The most recent releases landed on October 25, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | 마인드 부스터 Blue | Auer Circle |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/auer-circle/id6740163992/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | Every 15 months | **Every 11 months** |
| Monetization | — | Free |
| Size | 72 MB | 0 MB |
| Requires iOS | **13** | 26.6 |
| Devices | — | **iPhone** |
| Age rating | 12+ | 4+ |
| Developer | [Kyong Mee Chung](https://appshunter.io/developer/1441754708) | [Uri Fridman](https://appshunter.io/developer/1612958936) |

## What reviewers say

### 마인드 부스터 Blue

[App page](https://appshunter.io/ios/app/blue/id1591909232)

**In-app purchases:** none


### 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


## Frequently asked questions

### Is 마인드 부스터 Blue free?

마인드 부스터 Blue is free to download, with no in-app purchases.

### Is Auer Circle free?

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

### Which is updated more often, 마인드 부스터 Blue or Auer Circle?

마인드 부스터 Blue ships an update every 15 months, and Auer Circle every 11 months. Most recently, 마인드 부스터 Blue was updated on October 25, 2026 and Auer Circle on October 21, 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.*