# MERS.HK vs Cats InputPad Pro

The clearest difference is update cadence: MERS.HK at every 5 months against Cats InputPad Pro's every 22 months. MERS.HK also leads on iOS requirement (10.0 vs 15.0). Cats InputPad Pro's advantage is device support (3 vs 1). 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.HK ships an update every 5 months, Cats InputPad Pro every 22 months. The most recent releases landed on September 8, 2026 and August 26, 2026 respectively.

## The numbers

| Metric | MERS.HK | Cats InputPad Pro |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 40.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 22 months |
| Monetization | Free | — |
| Size | 2 MB | 8 MB |
| Requires iOS | **10.0** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Modern Educational Research Society, LTD](https://appshunter.io/developer/432268704) | [YIU LEUNG RANDY CHAN](https://appshunter.io/developer/1474191447) |

## What reviewers say

### MERS.HK

[App page](https://appshunter.io/ios/app/mershk/id555592128)

This app provides students and teachers with an optimized experience for accessing and interacting with e-learning resources. Users can annotate screenshots, seamlessly connect with other educational tools, and enjoy a locked rotation for comfortable viewing.

**Highlights:** Optimized viewing and access to e-learning resources, Screenshot annotation and sharing, Seamless integration with other MERS apps, Automatic rotation lock for comfortable use, Designed for MERS e-Learning in Schools partners

**In-app purchases:** none


### Cats InputPad Pro

[App page](https://appshunter.io/ios/app/cats-inputpad-pro/id1494612140)

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

**In-app purchases:** none


## Frequently asked questions

### Is MERS.HK free?

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

### Is Cats InputPad Pro free?

Cats InputPad Pro is free to download, with no in-app purchases.

### Do MERS.HK or Cats InputPad Pro have ads?

Neither MERS.HK nor Cats InputPad Pro shows ads.

### Which is updated more often, MERS.HK or Cats InputPad Pro?

MERS.HK ships an update every 5 months, and Cats InputPad Pro every 22 months. Most recently, MERS.HK was updated on September 8, 2026 and Cats InputPad Pro on August 26, 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.*