# R vs Aikikorner

The clearest difference is price: Aikikorner at Free against R's $0.99. Aikikorner also leads on update cadence (every 9 days vs every 3 months). R's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support there is nothing between them.

Aikikorner is free to download; R costs $0.99 up front. Aikikorner sells 1 one-off in-app purchase. R asks for nothing beyond the download.

R ships an update every 3 months, Aikikorner every 9 days. Both last shipped on September 21, 2026.

## The numbers

| Metric | R | Aikikorner |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/aikikorner-aikido/id6736950094/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 87.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 9 days** |
| Monetization | — | Free with in-app purchases |
| Size | 17 MB | 89 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | +17 |
| Developer | [Yoshiaki Onishi](https://appshunter.io/developer/852893746) | [David Margalef Mari](https://appshunter.io/developer/1100739499) |

## What reviewers say

### R

[App page](https://appshunter.io/ios/app/r-timer/id955756843)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Aikikorner

[App page](https://appshunter.io/ios/app/aikikorner-aikido/id6736950094)

This app helps Aikido practitioners review and clarify techniques with visual explanations and Japanese names. It's designed for use between classes to reinforce learning and prepare for exams. Access a video library and practice offline.

**Highlights:** Video library of 145+ HD techniques, Technique descriptions with Japanese names, Exam mode for grading preparation, Offline video access, Interactive quiz for technique names, Available in 18 languages

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Content | $3.99 | one-time |


## Frequently asked questions

### Is R free?

R costs $0.99, with no in-app purchases.

### Is Aikikorner free?

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

### Do R or Aikikorner have ads?

Aikikorner shows ads; R does not.

### Which is updated more often, R or Aikikorner?

R ships an update every 3 months, and Aikikorner every 9 days. Most recently, R was updated on September 21, 2026 and Aikikorner on September 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.*