# Aikido Encyclopedia vs Hidden Jiu

The clearest difference is price: Hidden Jiu at Free against Aikido Encyclopedia's $19.99. Hidden Jiu also leads on update cadence (every 2 weeks vs every 64 months) and iOS requirement (16.6 vs 26.0). On ads, in-app purchases and device support there is nothing between them.

Hidden Jiu is free to download; Aikido Encyclopedia costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Aikido Encyclopedia ships an update every 64 months, Hidden Jiu every 2 weeks. The most recent releases landed on November 6, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Aikido Encyclopedia | Hidden Jiu |
| --- | --- | --- |
| Price | $19.99 | **Free** |
| 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 64 months | **Every 2 weeks** |
| Monetization | Paid | — |
| Size | 414 MB | 45 MB |
| Requires iOS | 26.0 | **16.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nerd Alchemy LLC](https://appshunter.io/developer/927008025) | [Emily Sudduth](https://appshunter.io/developer/1721274803) |

## What reviewers say

### Aikido Encyclopedia

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

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


### Hidden Jiu

[App page](https://appshunter.io/ios/app/hidden-jiu-jitsu/id6480127094)

**In-app purchases:** none


## Frequently asked questions

### Is Aikido Encyclopedia free?

Aikido Encyclopedia costs $19.99, with no in-app purchases.

### Is Hidden Jiu free?

Hidden Jiu is free to download, with no in-app purchases.

### Do Aikido Encyclopedia or Hidden Jiu have ads?

Neither Aikido Encyclopedia nor Hidden Jiu shows ads.

### Which is updated more often, Aikido Encyclopedia or Hidden Jiu?

Aikido Encyclopedia ships an update every 64 months, and Hidden Jiu every 2 weeks. Most recently, Aikido Encyclopedia was updated on November 6, 2026 and Hidden Jiu on November 4, 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.*