PolyU GreenCoin vs ECEAA
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PolyU GreenCoin
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GreenCoin is an incentive-based programme at PolyU designed to promote campus-wide sustainability and recognize your efforts in making decarbonization impacts. By participating in selected sustainability activities and waste reduction actions, you can earn Coins through your mobile device. These Coins can then be redeemed for a variety of gifts and e-coupons, which are valid at various campus facilities. Join GreenCoin to make a difference and enjoy exclusive rewards for your sustainable actions!
ECEAA
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Connect, network, and thrive with your alumni community. The official ECE Alumni Association App brings events, news, jobs, and lifelong connections to your fingertips. Join us and enjoy more! All-in-one digital hub for staying connected with your alma mater and fellow graduates—no matter where life takes you. Events & Reunions Discover upcoming reunions, webinars, workshops, and regional meetups. RSVP, get reminders, and share event photos in real-time. News & Updates Stay informed with university announcements, faculty achievements, research breakthroughs, and alumni success stories delivered in a personalized feed. And more features will be coming soon!
Screenshots
Verdict
The clearest difference is ads: ECEAA at none against PolyU GreenCoin's shown. ECEAA also leads on update cadence (every 2 weeks vs every 3 months) and iOS requirement (13.0 vs 15.1). On price, 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.
PolyU GreenCoin ships an update every 3 months, ECEAA every 2 weeks. The most recent releases landed on September 28, 2026 and September 19, 2026 respectively.
| Parameter | PolyU GreenCoin | ECEAA |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 months | Every 2 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.1 | 13.0 — better |
| Further details — not scored | ||
| Size | 78 MB | 125 MB |
| Age rating | 4+ | 4+ |
| Developer | The Hong Kong Polytechnic University | Palmify |
In-app purchases
PolyU GreenCoin
No in-app purchases
ECEAA
No in-app purchases
