Comparison

MERS.HK vs Catholic DSI

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

MERS.HK

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
Read full description

MERS.HK MERS.HK is aiming to give students and teachers the best possible user experience designed for optimal use of the e-learning resources developed by Modern Educational Research Society, Ltd (MERS). Features: β€§ Provides students and teachers with the best viewing and accessing results when they use MERS resources. β€§ Allows users to take a screenshot on which they can make notes, draw or write remarks. Screenshots can be uploaded to Camera Roll or Share to other Apps. β€§ e-Learning activities are seamlessly connected to other apps developed by MERS for effective learning. β€§ Rotation is automatically locked, in line with the content and interface design of the materials for best viewing. * Only available for e-Learning in Schools partners of MERS.

About

Catholic DSI

Features
Read full description

The Official App of the Catholic Education Office, the Catholic Diocese of Hong Kong, aims to provide information, news, event enrolment and surveys to kindergartens, government-aided primary schools and government-aided secondary schools sponsored by the Catholic Diocese of Hong Kong. ε€©δΈ»ζ•™ι¦™ζΈ―ζ•™ε€ζ•™θ‚²δΊ‹ε‹™θ™•ηš„ζ‰‹ζ©Ÿζ‡‰η”¨η¨‹εΌγ€‚δΈ»θ¦ε‘ζ•™ε€ε±¬δΈ‹ζ”ΏεΊœζ΄₯θ²ΌδΈ­ε­Έγ€ε°ε­ΈεŠεΉΌη¨šεœ’ζδΎ›θ³‡θ¨Šγ€ε­Έζ ‘ζΆˆζ―γ€ζ΄»ε‹•ε ±εεŠε•ε·θͺΏζŸ₯。

Screenshots

Catholic DSI4 screens

Verdict

The call

The clearest difference is device support: Catholic DSI at 3 against MERS.HK's 1. On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

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

UpkeepUpdate frequency

MERS.HK ships an update every 5 months, Catholic DSI every 8 months. The most recent releases landed on September 8, 2026 and September 15, 2026 respectively.

Scorecard1 real difference Β· 7 level
MERS.HK versus Catholic DSI: the parameters behind the verdict, then further details
ParameterMERS.HKCatholic DSI
PriceFreeFree
Positive reviews40.0% of reviewsβ€”
Update frequencyEvery 5 months β€” betterEvery 8 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeβ€”
DevicesiPadiPhone, iPad, iPod β€” better
Requires iOS10.0 β€” better11.0
Further details β€” not scored
Size2 MB11 MB
Age rating4+4+
DeveloperModern Educational Research Society, LTDeClass Limited

In-app purchases

None

MERS.HK

No in-app purchases

None

Catholic DSI

No in-app purchases

Questions

Is MERS.HK free?
MERS.HK is free to download, with no in-app purchases.
Is Catholic DSI free?
Catholic DSI is free to download, with no in-app purchases.
Do MERS.HK or Catholic DSI have ads?
Neither MERS.HK nor Catholic DSI shows ads.
Which is updated more often, MERS.HK or Catholic DSI?
MERS.HK ships an update every 5 months, and Catholic DSI every 8 months. Most recently, MERS.HK was updated on September 8, 2026 and Catholic DSI on September 15, 2026.

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