Star Hoppers vs DaDa Call
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Star Hoppers
Explore the cosmos with interactive star charts, blending ancient Chinese and Western astronomy. Discover constellations through engaging audio stories and augmented reality.
- Interactive digital star chart
- Ancient Chinese and Western star charts
- Augmented Reality (AR) mode
- Bilingual audio recordings of constellation stories
- Astronomical event calendar
- Stargazing basics
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Star Hoppers won the “Smart Mobility (Smart Tourism) Certificate of Merit” in the “Hong Kong ICT Awards 2019”. Star Hoppers integrates the Chinese and Western star charts with information of astronomical events and related activities while telling the stories of constellations to you with its audio recordings. With its digital star chart, you will find that people from the ancient Chinese and Western cultures created different constellation and asterism system due to their different associations with the stars. The star chart has three different operation modes: the Virtual Reality (VR) mode simulates the star field according to the location and orientation data obtained from the device to help you identify celestial objects and constellations; the Augmented Reality (AR) mode marks the celestial objects, constellations and asterisms on your camera image in real-time by employing the augmented reality technology; the Manual (M) mode allows you to navigate the star chart at will. Tapping on any constellations, planets, the Sun, Moon or Three Enclosures and Twenty-eight Mansions, you can listen to the recorded stories of the constellations or celestial objects. Star Hoppers also introduces the basics of stargazing to promote the proper manner of stargazing as well as to help the novice to identify the constellations. You may also select the Calendar function to receive the latest information of various astronomical events and activities provided by the Hong Kong Space Museum. You may use the Share function with third party apps to invite your friends to join the activities and share the fun of stargazing with you! Features of the app: * Help users to learn and identify celestial objects and constellations with the realtime generated digital star chart at any locations in the world. * Display unique ancient Chinese star chart with the complete ancient Chinese asterism system including the Three Enclosures, twenty-eight lunar mansions and more. * Playback more than 200 bilingual audio recordings of basic information of celestial objects and asterisms in the Western and ancient Chinese cultures. * Employ augmented reality technology to label celestial objects and constellations on your screen instantaneously when you point the camera of your mobile device to the sky. * Provide the latest news on the coming Hong Kong Space Museum events such as astronomical films, lectures, stargazing activities etc. * Share astronomical events and activities information to your friends easily and invite them to join with you.
DaDa Call
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Dada turns long-distance family calls into a warm daily ritual. Made for families living far apart — a kid in one country, a parent or grandparent in another. Pair two iPhones with a simple 6-character code and every call becomes something to look forward to. No accounts, no sign-up. HOW IT WORKS • Pair once — create a connection, share the code, done. • One-tap calls — big friendly buttons start a FaceTime call to your person. • Earn coins — every call earns virtual coins in your family's own currency. Longer calls and streaks earn bonuses, and parents set the rules. • Write diaries — capture a little memory after each call. • Watch your buddy grow — a companion that grows with your call streak. • Question of the day — a fresh conversation starter, so there's always something to talk about. • Visit countdown — counting the days until you meet again. • Gift wishlist — kids save coins toward real rewards, with smart gift ideas by age. • Keepsake report — print a beautiful record of your calls together. MADE FOR FAMILIES • English and 繁體中文 • One kid can pair with Dad, Grandma and more — each connection keeps its own balance • No ads, no accounts, no third-party analytics. Your family's data stays yours. Coins are virtual — a playful family reward system, not real money. Note: calls use FaceTime, so both sides need an iPhone or iPad.
Screenshots
Verdict
The clearest difference is update cadence: DaDa Call at every 2 months against Star Hoppers's every 25 months. On price, ads, in-app purchases and device support 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.
Star Hoppers ships an update every 25 months, DaDa Call every 2 months. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.
| Parameter | Star Hoppers | DaDa Call |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (4 ratings) — better | — |
| Positive reviews | 78.6% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 25 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 59 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | HKSPM | Benjamin Cheung |
In-app purchases
Star Hoppers
No in-app purchases
DaDa Call
No in-app purchases








