# MERS eTextbook vs HKSSF

The clearest difference is update cadence: HKSSF at every 5 weeks against MERS eTextbook's every 3 months. HKSSF also leads on device support (3 vs 1) and iOS requirement (15.0 vs 18.6). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

MERS eTextbook ships an update every 3 months, HKSSF every 5 weeks. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | MERS eTextbook | HKSSF |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 16.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 66 MB | 14 MB |
| Requires iOS | 18.6 | **15.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Modern Educational Research Society, LTD](https://appshunter.io/developer/432268704) | [eClass Limited](https://appshunter.io/developer/1683448274) |

## What reviewers say

### 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


### HKSSF

[App page](https://appshunter.io/ios/app/hkssf/id1255454272)

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

**In-app purchases:** none


## Frequently asked questions

### Is MERS eTextbook free?

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

### Is HKSSF free?

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

### Do MERS eTextbook or HKSSF have ads?

Neither MERS eTextbook nor HKSSF shows ads.

### Which is updated more often, MERS eTextbook or HKSSF?

MERS eTextbook ships an update every 3 months, and HKSSF every 5 weeks. Most recently, MERS eTextbook was updated on November 6, 2026 and HKSSF on November 2, 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.*