Zero? vs AirCube
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Zero?
A fast-paced number game where players must quickly determine if sums of numbers are multiples of ten. Offers various modes for solo play or head-to-head challenges with friends.
- Sum calculation challenges
- Timed gameplay
- Relaxed mode without time pressure
- Two-player head-to-head mode
- Multiplayer on a single device
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Can you tell if the sum of 3 numbers are a multiple of ten? 4 numbers? More? It sounds easy, but hurry... time is running out! Challenge your friends, and play face-to-face on a single iPad or iPhone! Fun for all ages, choose your favourite mode: • Zoom & Zen, for a fast or easy-paced challenge • Relax, for stress-free fun without the time pressure • Two-player, the unique way to play with your friends in head-to-head action! Reviews for Sum Fun: “ It’s a solid math game, one that brings in interesting gameplay ideas and which has a stellar execution ” – AppGames.net: 9 / 10 “ By the time your kids have played with this app a few times, they’ll be adding up the numbers faster than you can say, ‘What’s six plus eight?’ ” – Fun2Tap: 5 / 5
AirCube
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AirCube is a simple block falling game. Drop your block and try to match two together to make 10. Swipe up/down to change numbers, swipe to right/left to move your block. You can tilt Siri Remote to control falling. This game is great at developing your mental arithmetic ability and math reflexes. Kids can learn simple math while playing this game. AirCube has 80 stages that feature GameCenter rankings. You can compete in High Scores, High Total Scores and Max Stage with AirCube players all over the world. AirCube is not compatible with third party bluetooth controllers.
Screenshots
Verdict
The clearest difference is price: Zero? at Free against AirCube's $2.99. Zero? also leads on device support (3 vs 1). AirCube's advantage is update cadence (every 2 days vs every 3 months). On ads, in-app purchases and iOS requirement 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
Zero? is free to download; AirCube costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Zero? ships an update every 3 months, AirCube every 2 days. The most recent releases landed on October 3, 2026 and December 28, 2025 respectively.
| Parameter | Zero? | AirCube |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | 3.3 (4 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 3 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | Apple TV |
| Requires iOS | 8.0 — better | 9.0 |
| Further details — not scored | ||
| Size | 27 MB | 28 MB |
| Age rating | 4+ | 4+ |
| Developer | Greg Sharpe | Newton Japan Inc. |
In-app purchases
Zero?
No in-app purchases
AirCube
No in-app purchases








