Quantum Quiz App vs ctstris
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Quantum Quiz App
Test and improve your knowledge of quantum technologies with this engaging quiz app. Play solo or compete with others in multiplayer modes, with over 800 questions across three difficulty levels. Submit your own questions to contribute to the growing library.
- Improve quantum technology knowledge
- Solo and multiplayer modes
- Over 800 questions
- Three difficulty levels
- Submit your own questions
- Monthly high score reset
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Quantum Quiz is a fun app, developed by employees, partners and friends of TOPTICA Photonics. Imagine being able to playfully improve your knowledge of quantum technologies. Every day, at any place and at any time. Our new quiz app now makes this possible for all quantum technology enthusiasts. Though there are no tangible prizes, players win by enhancing their quantum knowledge and the joy of the game. Players can test and improve their knowledge in exciting contests with like-minded people with questions such as "Which atom might be a good candidate for a nuclear atomic clock?" or "What is forbidden for a quantum state?" There are currently more than 800 questions in the app, divided into three levels of difficulty: Level 1 can typically be answered by people with a general interest in Optics/Physics/Science and a sense of humor. Level 2 can typically be answered by people who paid attention during their physics classes at university. Level 3 is for experts in the field of quantum technologies. The app offers two game modes: Solo and Multiplayer. Up to 4 people in each multiplayer game and several parallel multiplayer games are possible. The high score table will be reset at the beginning of each month, when TOPTICA will add new questions to the library. Everybody is invited to submit their own questions via the app!
ctstris
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● beats ▲. ▲ beats ■. ■ beats ●. That's the only rule — and now it's a falling-block puzzle. ■ BEAT IT TO BREAK IT When your piece beats every block it lands on, it smashes them all and keeps drilling down. One tie or loss underneath and it stops right there. ■ CHAIN COMBOS Every crush in a row multiplies your score: ×2, ×3 and beyond. The landing preview shows exactly how deep you'll drill and which blocks will break. ■ EVOLVE One button turns your piece into the shape that beats it. You get half a second after touchdown to flip the matchup. ■ CLEAR LINES, SCORE A CTSTRIS! Fill a row to clear it. Clear four at once for a CTSTRIS! Lines and crushes both push you to the next level. ■ PRESSURE FROM BELOW Every few pieces, a new row of garbage rises from the bottom. The higher your level, the faster it gets. • 7 pieces, 3 shapes • Play with buttons or swipes • Haptic feedback and punchy crush effects • Best score tracking • No ads, no data collected
Screenshots
Verdict
Quantum Quiz App and ctstris are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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.
Quantum Quiz App ships an update every 12 months, ctstris every 17 months. The most recent releases landed on October 16, 2026 and October 24, 2026 respectively.
| Parameter | Quantum Quiz App | ctstris |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 12 months — better | Every 17 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.2 — better | 15.0 |
| Further details — not scored | ||
| Size | 97 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Toptica Photonics AG | Sungjun Kim |
In-app purchases
Quantum Quiz App
No in-app purchases
ctstris
No in-app purchases









