Timer Challenge vs ZeroIn
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Timer Challenge
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Are you ready to test your absolute split-second reflexes and precision? Welcome to PerfectStop, the ultimate high-speed reaction challenge! The concept is simple but incredibly challenging: a high-speed millisecond timer starts running, and your goal is to tap and stop it exactly on the target second (like 1.00s, 5.00s, or 10.00s) down to the exact millisecond! It is a game of pure focus, rhythm, and timing. Why you will love PerfectStop: • THRILLING CAMPAIGN STAGES Navigate through multiple solo levels designed to test your limits. Be prepared for dynamic speed shifts! In advanced levels, the digital timer disappears completely after a few seconds, forcing you to rely solely on your internal clock and rhythm to hit the perfect stop. • HEAD-TO-HEAD VERSUS MODE Compete against your friends on a single split-screen! Test your reflexes in real-time local multiplayer to see who possesses the sharpest focus and fastest reaction time. • STUNNING CYBER-NEON AESTHETICS Immerse yourself in a beautiful, futuristic cyberpunk visual theme. Enjoy pulsating neon lights, glowing target rings, dynamic animations, and satisfying haptic feedback that makes every perfect stop feel amazingly rewarding. • GO PREMIUM (ADS FREE) Instantly remove all banner and interstitial ads and unlock all single-player stages with a single, quick in-app purchase. Keep your focus uninterrupted! Put your timing and focus to the test. Can you hit a Perfect Stop? Download PerfectStop now and claim your crown as the timing master! --- • PRIVACY & TERMS Privacy Policy: https://shorturl.at/H93S1 Terms & Conditions: https://shorturl.at/wBTJM
ZeroIn
A reflex game where players stop a timer precisely on target, featuring various timing modes and challenges. Compete with others online or test your skills through hundreds of levels. Boosters and daily rewards help you progress.
- Stopwatch timing challenges
- Visible, vanishing, and blind timing modes
- Math and time estimation targets
- Online reflex duels with leaderboards
- Monthly seasons with rewards
- Boosters for assistance
- Daily rewards and streaks
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ZeroIn is a stopwatch reflex game: the clock runs and you stop it exactly on target. Sounds easy — until the timer disappears. 300+ LEVELS • Visible clock, vibration beats, fully blind timing and countdowns • Vanishing digits that show for two seconds, then fade away • Math targets: if it's 3 × 2, stop the clock at 6.00 • Time estimation: feel 7.35 seconds without seeing a single digit TEST YOUR REACTION TIME Every stop is measured in milliseconds. Earn up to three stars, chase gold (under 10 ms) and unlock new START buttons with your points. ONLINE REFLEX DUELS • Real-time tables with up to 12 players • Invite friends with a link and rematch in seconds • Climb the global ranking and the monthly season MONTHLY SEASONS The top three of every season win a champion frame and a full month of ZeroIn Pro. BOOSTERS Second Chance, Slow-Mo, Reveal Timer and Second Buzz help you through the toughest levels. DAILY REWARDS Come back every day for lives, boosters and bonus stars — and save your streak if you miss a day. ZeroIn Pro: no ads, unlimited lives, double star points and the Black Hole button.
Screenshots
Verdict
The clearest difference is update cadence: ZeroIn at every 3 weeks against Timer Challenge's every 2 months. 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. Timer Challenge sells 1 one-off in-app purchase and ZeroIn sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Timer Challenge ships an update every 2 months, ZeroIn every 3 weeks. The most recent releases landed on October 7, 2026 and October 21, 2026 respectively.
| Parameter | Timer Challenge | ZeroIn |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 16.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 15 MB | 54 MB |
| Age rating | 4+ | 4+ |
| Developer | MUNEER SABLAL | Emre ALTUN |
In-app purchases
Timer Challenge
- Remove Ads & Unlock All$0.99
ZeroIn
- Life Refill$1.99
- Remove Ads$3.99
- ZeroIn Pro$9.99









