# Aikido Encyclopedia vs Engineered Per4mance

The clearest difference is price: Engineered Per4mance at Free against Aikido Encyclopedia's $9.99. Engineered Per4mance also leads on update cadence (every 46 months vs every 97 months). Aikido Encyclopedia's advantage is ads (none vs shown) and iOS requirement (12.0 vs 15). On in-app purchases and device support there is nothing between them.

Engineered Per4mance is free to download; Aikido Encyclopedia costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Aikido Encyclopedia ships an update every 97 months, Engineered Per4mance every 46 months. The most recent releases landed on October 15, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Aikido Encyclopedia | Engineered Per4mance |
| --- | --- | --- |
| Price | $9.99 | **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** | Yes |
| Update frequency | Every 97 months | **Every 46 months** |
| Monetization | Paid | — |
| Size | 417 MB | 91 MB |
| Requires iOS | **12.0** | 15 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nerd Alchemy LLC](https://appshunter.io/developer/927008025) | [Engineered Performance](https://appshunter.io/developer/1876053679) |

## 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


### Engineered Per4mance

[App page](https://appshunter.io/ios/app/engineered-per4mance/id1623876256)

**Features:** Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Aikido Encyclopedia free?

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

### Is Engineered Per4mance free?

Engineered Per4mance is free to download, with no in-app purchases.

### Do Aikido Encyclopedia or Engineered Per4mance have ads?

Engineered Per4mance shows ads; Aikido Encyclopedia does not.

### Which is updated more often, Aikido Encyclopedia or Engineered Per4mance?

Aikido Encyclopedia ships an update every 97 months, and Engineered Per4mance every 46 months. Most recently, Aikido Encyclopedia was updated on October 15, 2026 and Engineered Per4mance on October 3, 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.*