FlashInvaders vs Zennio Key
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FlashInvaders
Discover and document street art mosaics globally. Scan artwork to add it to your personal gallery, earn points, and track your progress. Share your finds and compete with friends.
- Discover street art mosaics
- Scan and document artwork
- Personal mosaic gallery
- Share discoveries on social media
- Follow friends' scores
- Live worldwide flash stream
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FlashInvaders is the official application of the artist Invader. Go and search for his thousands mosaics all around the world, flash them and get points. - Valid flashes are added to your own gallery where you can find all the mosaics you have found anytime. - You can also share your discoveries on social networks. - Create your followers list and follow your friends' scores. - Follow the live stream to see all the flashes in real time worldwide.
Zennio Key
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Zennio Key app allows you to download in your smartphone the Bluetooth key to access your room during your stay in a hotel with the Zennio Access Control system installed: Z-Access. Zennio Key enables contactless access, completing the check-in process already available in many hotels where the guest is not required to personally go to reception to pick up the room key. This App is only compatible with Zennio Access control systems.
Screenshots
Verdict
The clearest difference is update cadence: Zennio Key at every 3 weeks against FlashInvaders's every 11 months. FlashInvaders's advantage is iOS requirement (12.0 vs 15.0). 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.
FlashInvaders ships an update every 11 months, Zennio Key every 3 weeks. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.
| Parameter | FlashInvaders | Zennio Key |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (907 ratings) — better | — |
| Positive reviews | 76.6% of reviews | — |
| Number of ratings | 907 — better | — |
| Update frequency | Every 11 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 20 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | flash invaders | Zennio |
Bugs and requests
FlashInvaders
Reported bugs
4 issues- Camera not working
- Login/sign-up issues
- Crashes and black screens
- Inability to restore lost galleries
Requested features
5 requests- Ability to upload existing photos
- Improved validation and recognition
- Geolocation support for damaged invaders
- Higher zoom levels
- More invaders in different regions
Zennio Key
Not enough reviews yet to summarise bugs or requests.
In-app purchases
FlashInvaders
No in-app purchases
Zennio Key
No in-app purchases
