HKAStro vs EMM EDB
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HKAStro
This educational app delivers local astronomical news, event updates, and weather forecasts. It includes helpful tools like a polar scope and moon phase tracker for stargazing enthusiasts.
- Local astronomical news
- Event information
- Weather forecasts
- Polar Scope tool
- Moon Phase tracker
- Flashlight feature
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This mobile app is provided by the Hong Kong Astronomical Society, aims to provide users with the latest local astronomical news, activities, weather forecast information, and provides useful features such as Polar Scope, Moon Phase, Flashlight, etc.
EMM EDB
This app offers a rich collection of educational multimedia resources, including videos, animations, and picture books, designed to support learning for kindergarten, primary, and secondary students and teachers. Resources are aligned with the school curriculum and aim to enrich the learning experience and facilitate teaching activities.
- Theme-based short videos
- Multi-ending micro movies
- Animations and nursery rhymes
- Picture books and sound tracks
- Curriculum-aligned resources
- Informational videos for parents and teachers
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Educational Multimedia (EMM) is provided by the Education Bureau (EDB) for kindergarten, primary and secondary students as well as teachers to support learning and teaching. EMM includes theme-based short videos, multi-ending micro movies, animations, nursery rhymes, picture books, photos, sound tracks, and videos which are divided into chapters and short clips of a few minutes. These resources are developed based on the school curriculum and students’ learning needs, and are provided freely for schools to facilitate the design of learning and teaching activities and to enrich students' learning experience. Besides, informational videos are also developed for parents and teachers to introduce the latest developments in education. EMM resources are available on the Hong Kong Education City (HKEdCity) EMM website (https://emm.hkedcity.net) and this mobile application.
Screenshots
Verdict
HKAStro and EMM EDB both sit at 5.0 stars, but that hides the real split: 100% of HKAStro's written reviews are positive against 27% of EMM EDB's. HKAStro also leads on iOS requirement (13.0 vs 15.0). On price, rating, ratings volume and update cadence there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for HKAStro against 5.0 for EMM EDB. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews are what separate them: 100% of HKAStro's written reviews are positive against 27% of EMM EDB's.
HKAStro ships an update every 10 months, EMM EDB every 5 months. Both last shipped on November 1, 2026.
| Parameter | HKAStro | EMM EDB |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews — better | 27.3% of reviews |
| Number of ratings | 2 — better | 1 |
| Update frequency | Every 10 months | Every 5 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 120 MB | 163 MB |
| Age rating | 4+ | 4+ |
| Developer | Hong Kong Astronomical Society | 香港教育電視 |
Customer experience
HKAStro
EMM EDB
In-app purchases
HKAStro
No in-app purchases
EMM EDB
No in-app purchases
