On Time vs ZeroIn
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
On Time
Test your internal clock by stopping a timer at precisely 10 seconds. Compete globally with three distinct game modes and unlockable themes. It's a simple yet challenging game of timing and focus.
- One-tap gameplay
- Three distinct game modes
- Extended precision timing
- Global leaderboards
- Unlockable themes
- Daily challenges
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How well do you know 10 seconds? Press START. Count to ten in your head. Press STOP. Stop the timer at exactly 10.00 — no peeking. That's the whole game. Easy to play, hard to perfect. It's just you against your own internal clock. How close can you get? How to play • Tap START and start counting in your head • Tap STOP the instant you reach 10 seconds • See exactly how far off you were, then try to beat it Features • One-tap play — START, STOP, RETRY, nothing else to learn • Three modes — Normal, Blink (timer flashes), Blind (timer hides) • Extended precision — chase 10.0000 down to four decimals • Global leaderboards — rank worldwide for the most 10.00 stops. All-time and weekly, every mode • 121 hidden achievements to uncover • 7 unlockable themes, earned through play or with Stars you collect • Daily challenges and login streaks • Sign in with Apple or Google — keep your progress on any device • Clean, distraction-free design built for focus No luck, just your sense of time. Can you hit 10.00 on the dot?
ZeroIn
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ZeroIn is built on pure timing: easy to learn, hard to master. The clock runs; your only job is to stop it exactly on target. The closer you get, the more stars you earn. 318 LEVELS, RISING DIFFICULTY Levels were redesigned from scratch. No dead time between rounds — every phase introduces a new mechanic. THREE GAME TYPES • Math — the target time is the answer to a problem. If it's 3 × 2, stop the clock at 6.00. • Time estimation — the clock is hidden; only your inner sense of time. • Vanishing number — digits show for two seconds, then fade away. ONLINE TABLES • Real-time races with up to 12 players • Invite a friend with a link — they land straight at your table • Empty lobby? Start against bots right away, no waiting • Rematches, trophies and rankings SEASONS A fresh ranking every month. At the end of the month the top three get an exclusive frame and a full season of Pro perks. START BUTTONS Unlock new START buttons with the stars you collect: prism, magma, black hole, clockwork and more. Your pick stays with you through every game. LIVES AND REWARDS Lives refill over time. Collect stars to earn bonus lives, watch a rewarded ad, or go unlimited with ZeroIn Pro. ZeroIn Pro: no ads, unlimited lives, an exclusive frame and every button unlocked.
Screenshots
Verdict
The clearest difference is update cadence: On Time at every 2 days against ZeroIn's every 5 days. 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. On Time sells 3 one-off in-app purchases and ZeroIn sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
On Time ships an update every 2 days, ZeroIn every 5 days. The most recent releases landed on September 18, 2026 and September 17, 2026 respectively.
| Parameter | On Time | ZeroIn |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (24 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 24 — better | — |
| Update frequency | Every 2 days — better | Every 5 days |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 71 MB | 53 MB |
| Age rating | 4+ | 4+ |
| Developer | Byung Hun Lee | Emre ALTUN |
In-app purchases
On Time
- 10 Stars$0.99
- Remove Ads$2.99
- 60 Stars$4.99
ZeroIn
- Life Refill$1.99
- Remove Ads$3.99
- ZeroIn Pro$9.99









