# Ninja Notebook — Bujinkan Study Aid

> Digital notebook for martial arts study, with iCloud sync and Apple Pencil support. (iPhone/iPad app by David Kester.)

- Source: https://appshunter.io/ios/app/ninja-notebook/id1539316619 (this page in markdown: same URL + `.md`)
- Developer: [David Kester](https://appshunter.io/developer/1539316621)
- Category: Lifestyle, Health & Fitness
- Price: $3.99
- Rating: 4.67/5 from 3 App Store ratings · 1 written reviews indexed
- Age rating: 9+
- Requires: iOS 14.0 · 3 MB
- Languages: English
- Released: 2020-11-11
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/ninja-notebook/id1539316619/reviews.md

## What is Ninja Notebook?

Search and Filter your notes easily, no more endless searching. Filter techniques and kamae by lineage, or level.  Write notes using your iPad, and carry them with you on your phone. All your notes are safe in iCloud, and Synced across all your devices. No more carrying around your irreplaceable hard copy notes. It's all backed up for you, instantly.
If you have an Apple Pencil, you can write notes the same as you scribble on a paper notepad!
Carry your notes with you always, and it's like you never leave the dojo. You can hold that dojo mind set with you everywhere.

## Key features

- Search and filter notes
- Filter by lineage and level
- Write notes with Apple Pencil
- iCloud sync across devices
- Mobile access to notes
- Digital backup of notes

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/ninja-notebook/id1539316619/reviews.md

### 4/5 — Smarter not harder.

*2021-02-16*

Need a slot in “note” or technique space to add a video(from my GoPro).  Looks to be an AWESOME app.

## Frequently asked questions about Ninja Notebook

### What is Ninja Notebook used for?

Ninja Notebook is a digital study aid designed for martial arts practitioners. It allows users to create, organize, search, and filter notes related to techniques, lineages, and levels, replacing the need for physical notebooks.

### How much does Ninja Notebook cost?

Ninja Notebook is a paid application, available for a one-time purchase of $3.99. There are no additional in-app purchases or subscription fees.

### Does Ninja Notebook have ads?

No, Ninja Notebook does not contain advertisements. It is a paid app designed to provide an uninterrupted user experience.

### What devices does Ninja Notebook support?

Ninja Notebook is compatible with iPhone, iPad, and iPod devices. Notes are synced across all your Apple devices via iCloud.

### Can I write notes with a stylus in Ninja Notebook?

Yes, Ninja Notebook supports Apple Pencil, allowing you to write notes naturally as if you were using a paper notepad.

### How often is Ninja Notebook updated?

The latest version of Ninja Notebook is 1.03, last updated on July 20, 2021. Information on update frequency beyond this is not provided.

### What is the age rating for Ninja Notebook?

Ninja Notebook has an age rating of 9+, making it suitable for younger users and adults alike.

### How are my notes protected in Ninja Notebook?

All your notes are securely stored and synced via iCloud, ensuring they are backed up and safe. This eliminates the risk of losing irreplaceable hard copy notes.

## Version history (last 4 releases)

### 1.03 — 2021-07-20

Bug fix for iPadOS and ground work for future enhancements.

### 1.02 — 2020-11-16

UI enhancements to make note taking easier. Now you can just note the technique name and category and fill out the details later.

Changes to enable more filter dimensions, and some bug fixes.

### 1.01 — 2020-11-16

UI enhancements to make note taking easier. Now you can just note the technique name and category and fill out the details later.

### 1.0 — 2020-11-11

No release notes.

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## More apps by David Kester

- [ABC かな](https://appshunter.io/ios/app/abc/id1544508640)

All apps by David Kester: https://appshunter.io/developer/1539316621

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*