# MEISAI Σ vs Tsuzuru Book

The clearest difference is in-app purchases: MEISAI Σ at none against Tsuzuru Book's 1. MEISAI Σ also leads on ads (none vs shown). Tsuzuru Book's advantage is update cadence (every 5 days vs every 2 weeks). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Tsuzuru Book sells 1 one-off in-app purchase. MEISAI Σ asks for nothing beyond the download.

MEISAI Σ ships an update every 2 weeks, Tsuzuru Book every 5 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | MEISAI Σ | Tsuzuru Book |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (8 ratings)](https://appshunter.io/ios/app/meisai/id1531312377/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 35.5% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | **Every 5 days** |
| Monetization | Free | — |
| Size | 87 MB | 32 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Takayuki WATANABE](https://appshunter.io/developer/1478222839) | [Takeru Narita](https://appshunter.io/developer/901375401) |

## What reviewers say

### MEISAI Σ

[App page](https://appshunter.io/ios/app/meisai/id1531312377)

This app utilizes LiDAR sensors to create augmented reality effects by recognizing surrounding shapes like walls and floors. It integrates with music to generate dynamic visual experiences, transforming your environment with new visual effects.

**Highlights:** LiDAR-based AR effects, Recognizes walls and floors, Music-reactive visuals, Dynamic environmental effects

**In-app purchases:** none


### Tsuzuru Book

[App page](https://appshunter.io/ios/app/tsuzuru-book/id6808061413)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $9.99 | one-time |


## Frequently asked questions

### Is MEISAI Σ free?

MEISAI Σ is free to download, with no in-app purchases.

### Is Tsuzuru Book free?

Tsuzuru Book is free to download, with in-app purchases available.

### Do MEISAI Σ or Tsuzuru Book have ads?

Tsuzuru Book shows ads; MEISAI Σ does not.

### Which is updated more often, MEISAI Σ or Tsuzuru Book?

MEISAI Σ ships an update every 2 weeks, and Tsuzuru Book every 5 days. Most recently, MEISAI Σ was updated on November 3, 2026 and Tsuzuru Book on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*