# Smooth Reader vs ムー

The clearest difference is price: ムー at Free against Smooth Reader's $3.99. ムー also leads on device support (3 vs 1) and iOS requirement (9.0 vs 15.5). Smooth Reader's advantage is update cadence (every 2 months vs every 40 months). On ads and in-app purchases there is nothing between them.

ムー is free to download; Smooth Reader costs $3.99 up front. Smooth Reader sells 10 one-off in-app purchases and ムー sells 3 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

Smooth Reader ships an update every 2 months, ムー every 40 months. The most recent releases landed on June 5, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Smooth Reader | ムー |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/smooth-reader/id423956172/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 40 months |
| Monetization | Paid | — |
| Size | 34 MB | 21 MB |
| Requires iOS | 15.5 | **9.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Personal Media Corp.](https://appshunter.io/developer/379885557) | [Gakken CO.,LTD](https://appshunter.io/developer/294791161) |

## What reviewers say

### Smooth Reader

[App page](https://appshunter.io/ios/app/smooth-reader/id423956172)

This app offers a fast and smooth PDF reading experience, mimicking the feel of physical books. It features a unique "Home View" for enlarged text reading and a dynamic 3D perspective library for easy book discovery and organization.

**Highlights:** Smooth page turning, Home View for enlarged text, 3D perspective book library, Book categorization with tags, Smart tags for new/recent books, Bookmark management, Table of contents support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TRONWARE VOL.178 | $6.99 | one-time |
| TRONWARE VOL.173 | $6.99 | one-time |
| TRONWARE VOL.176 | $6.99 | one-time |
| TRONWARE VOL.174 | $6.99 | one-time |
| TRONWARE VOL.175 | $6.99 | one-time |
| TRONWARE VOL.172 | $6.99 | one-time |
| TRONWARE VOL.177 | $6.99 | one-time |
| TRONWARE VOL.180 | $6.99 | one-time |
| TRONWARE VOL.179 | $6.99 | one-time |
| TRONWARE VOL.181 | $6.99 | one-time |


### ムー

[App page](https://appshunter.io/ios/app/id1004467935)

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| mu | $6.99 | per month |
| mu | $17.49 | per 3 months |
| mu | $33.99 | per 6 months |


## Frequently asked questions

### Is Smooth Reader free?

Smooth Reader costs $3.99, and also offers in-app purchases.

### Is ムー free?

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

### Do Smooth Reader or ムー have ads?

Neither Smooth Reader nor ムー shows ads.

### Which is updated more often, Smooth Reader or ムー?

Smooth Reader ships an update every 2 months, and ムー every 40 months. Most recently, Smooth Reader was updated on June 5, 2026 and ムー on September 21, 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.*