# Dr. Mobile vs Aikido Encyclopedia

The clearest difference is price: Dr. Mobile at Free against Aikido Encyclopedia's $9.99. Dr. Mobile also leads on update cadence (every 2 months vs every 97 months). Aikido Encyclopedia's advantage is chart position (#196 vs unranked). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Dr. Mobile is free to download; Aikido Encyclopedia costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Dr. Mobile ships an update every 2 months, Aikido Encyclopedia every 97 months. The most recent releases landed on September 15, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Dr. Mobile | Aikido Encyclopedia |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | — | **[4.2 (6 ratings)](https://appshunter.io/ios/app/aikido-encyclopedia/id1104990681/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | — | 75.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 97 months |
| Monetization | — | Paid |
| Best chart rank | — | **#196** |
| Size | 21 MB | 417 MB |
| Requires iOS | 13.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Greenline Synergy](https://appshunter.io/developer/791955281) | [Nerd Alchemy LLC](https://appshunter.io/developer/927008025) |

## What reviewers say

### Dr. Mobile

[App page](https://appshunter.io/ios/app/dr-mobile/id1002948765)

**Features:** macOS Compatibility

**In-app purchases:** none


### Aikido Encyclopedia

[App page](https://appshunter.io/ios/app/aikido-encyclopedia/id1104990681)

**Currently charting:** #196 Top Paid · Health & Fitness (US App Store)

Access a comprehensive video library of over 460 traditional Aikido techniques, including empty-hand, Jo, and Ken exercises. This tool aids practitioners of all levels in studying specific moves, expanding their repertoire, and organizing techniques for class planning or exam preparation.

**Highlights:** Extensive video library of 460+ techniques, Covers empty-hand, Jo, and Ken exercises, Detailed examples for study, Helps expand technique repertoire, Create and edit custom technique collections, Useful for teachers and students

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

**In-app purchases:** none


## Frequently asked questions

### Is Dr. Mobile free?

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

### Is Aikido Encyclopedia free?

Aikido Encyclopedia costs $9.99, with no in-app purchases.

### Do Dr. Mobile or Aikido Encyclopedia have ads?

Neither Dr. Mobile nor Aikido Encyclopedia shows ads.

### Which is updated more often, Dr. Mobile or Aikido Encyclopedia?

Dr. Mobile ships an update every 2 months, and Aikido Encyclopedia every 97 months. Most recently, Dr. Mobile was updated on September 15, 2026 and Aikido Encyclopedia on September 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.*