# 正字戰隊 vs MERS eTextbook

The clearest difference is review sentiment: 正字戰隊 at 100% against MERS eTextbook's 17%. MERS eTextbook's advantage is in-app purchases (none vs 1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 正字戰隊 sells 1 one-off in-app purchase. MERS eTextbook asks for nothing beyond the download.

正字戰隊 ships an update every 2 months, MERS eTextbook every 3 months. The most recent releases landed on September 15, 2026 and August 28, 2026 respectively.

## The numbers

| Metric | 正字戰隊 | MERS eTextbook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/id507376434/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | **100.0% of reviews** | 16.7% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | — | Free |
| Size | 36 MB | 66 MB |
| Requires iOS | **18** | 18.6 |
| Devices | **iPhone, iPad** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yan Kin LEUNG](https://appshunter.io/developer/320172517) | [Modern Educational Research Society, LTD](https://appshunter.io/developer/432268704) |

## What reviewers say

### 正字戰隊

[App page](https://appshunter.io/ios/app/id507376434)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 正字戰隊 消除廣告(加送十萬金幣) | $0.99 | one-time |


### MERS eTextbook

[App page](https://appshunter.io/ios/app/mers-etextbook/id559730704)

This application allows students to download and access eTextbooks from their school. It provides interactive learning tools, multimedia content, and tracks user progress. Content is personalized based on user login and school affiliation.

**Highlights:** Downloadable eTextbooks, Personalized content by school, Interactive learning tools, Multimedia integration, Learning history tracking, Notifications for new content

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

**In-app purchases:** none


## Frequently asked questions

### Is 正字戰隊 free?

正字戰隊 is free to download, with in-app purchases available.

### Is MERS eTextbook free?

MERS eTextbook is free to download, with no in-app purchases.

### Do 正字戰隊 or MERS eTextbook have ads?

Neither 正字戰隊 nor MERS eTextbook shows ads.

### Which is updated more often, 正字戰隊 or MERS eTextbook?

正字戰隊 ships an update every 2 months, and MERS eTextbook every 3 months. Most recently, 正字戰隊 was updated on September 15, 2026 and MERS eTextbook on August 28, 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.*