# Review Notebook 2 vs Tensei Algorithm

The clearest difference is in-app purchases: Tensei Algorithm at none against Review Notebook 2's 1. Tensei Algorithm also leads on update cadence (every 5 days vs every 2 months). Review Notebook 2's advantage is device support (3 vs 1) and iOS requirement (10.0 vs 26.2). On price and ads there is nothing between them.

Both are free to download. Review Notebook 2 sells 1 one-off in-app purchase. Tensei Algorithm asks for nothing beyond the download.

Review Notebook 2 ships an update every 2 months, Tensei Algorithm every 5 days. The most recent releases landed on October 3, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Review Notebook 2 | Tensei Algorithm |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 90.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 97 MB | 29 MB |
| Requires iOS | **10.0** | 26.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [tadashi atoji](https://appshunter.io/developer/431510057) | [KAORU IMAI](https://appshunter.io/developer/1890363790) |

## What reviewers say

### Review Notebook 2

[App page](https://appshunter.io/ios/app/review-notebook-2/id519945783)

This notebook app allows you to store photos, maps, and notes on a single page. You can attach stars to notes, use emoji for decoration, and search across all your entries. Backup your notes to Dropbox or email.

**Highlights:** Attach photos, maps, and notes to pages, Star rating system for notes, Emoji input for decoration, Search within notes and across all entries, Backup notes to Dropbox or email, Universal app for iPhone and iPad

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| full-version | $3.99 | one-time |


### Tensei Algorithm

[App page](https://appshunter.io/ios/app/tensei-algorithm/id6761587481)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Review Notebook 2 free?

Review Notebook 2 is free to download, with in-app purchases available.

### Is Tensei Algorithm free?

Tensei Algorithm is free to download, with no in-app purchases.

### Do Review Notebook 2 or Tensei Algorithm have ads?

Both Review Notebook 2 and Tensei Algorithm show ads.

### Which is updated more often, Review Notebook 2 or Tensei Algorithm?

Review Notebook 2 ships an update every 2 months, and Tensei Algorithm every 5 days. Most recently, Review Notebook 2 was updated on October 3, 2026 and Tensei Algorithm on October 5, 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.*