Tick vs Atto
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Tick
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Tick โ knowing exactly when "now" is, down to the millisecond. Your phone's clock can drift by several seconds. When a sale, a drop, or a livestream opens, "you thought it was time but the platform hadn't opened yet" costs you. Tick calibrates your time, then gives you a clear millisecond countdown. CALIBRATE FIRST, THEN COUNT DOWN ยท NTP standard time: align to atomic-grade time in one tap, and see how many milliseconds your phone is off ยท Website sync: read the time returned by a website you choose, to align to "that platform's clock" ยท Once calibrated, every countdown uses the corrected reference time A MILLISECOND COUNTDOWN YOU CAN READ ยท Set a target moment; a big countdown ticks to 0.001s in the final minute ยท Live on the Dynamic Island / Lock Screen โ no need to stare at the app ยท Strong haptics + a notification right before zero ยท Floating millisecond window (advanced): stays on top even after you switch apps TIME ONLY โ NEVER PURCHASING ยท Tick only provides accurate time and countdown reminders ยท It does not participate in, act on behalf of, or automate any purchase or checkout ยท No account, no ads, no social TICK PRO (one-time purchase, yours forever) ยท Unlimited countdowns: save as many target moments as you like ยท All color themes: light up the Island and Lock Screen ยท Support an indie developer: no subscription, no ads Catching the moment starts with getting the time right.
Atto
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A ticket drop is decided in milliseconds, not seconds. The queue opens on the booking server's clock, not your phone's. The two are usually tens to hundreds of milliseconds apart, and that gap decides your place in line. Atto reads the server's clock directly, and shows you how well it read it. Measuring server time An HTTP Date header only resolves to the second, so one read tells you ยฑ500ms and no more. Atto probes at 137ms intervals so each request lands on a different phase inside the second. Once the offset narrows, it predicts when the server's second will roll over and aims at that edge. Twenty overlapping measurements fold the error down to the round trip. The error bar stays visible Instead of a label like "high accuracy" you get the measured figure: ยฑ23ms. Sample count, rejected samples, best round trip, and how far this server runs from national standard time are all on screen. Cached responses get dropped When a CDN answers instead of the origin, the clock inside that response is frozen at the moment it was stored. Atto checks the Age and cache headers and keeps those responses out of the average. Device drift correction Your phone's oscillator runs seconds off per day. Atto measures the slope between syncs, extrapolates it to now, and re-syncs every two minutes while you wait. Picture in Picture Press Start and a Picture in Picture window floats above your other apps. Show a decreasing countdown or a corrected wall clock that advances toward your configured target, with three-digit milliseconds. Keep the timing in sight while using a booking app or webpage. Haptics and sound Taps begin at the lead time you set and end with one hard hit at zero. The whole pattern goes to Core Haptics up front rather than a timer, so zero does not move even if the screen stutters. Sound is optional and plays through the silent switch. Practice mode A recommended lead time is somebody else's number. Measure the gap between the buzz and your tap actually registering, then apply your own median. Time sources Over 300 sources across 14 regions, including Ticketmaster, AXS, StubHub, Interpark, e+, tixCraft and Damai, plus course registration sites and sneaker drops. Standard-time servers like NIST, NPL, PTB, NICT and KRISS are there too, and you can type any address yourself. Free and paid Everything that decides whether you get the ticket is free: full sync accuracy, drift correction, the on-screen countdown, haptics, every time source, practice mode. One rewarded ad floats a single countdown in a PiP window. A one-time purchase removes ads and keeps PiP unlocked. It is not a subscription. Reading a clock takes one HEAD request. Atto never asks for an account and takes no part in the booking itself. English, ํ๊ตญ์ด, ๆฅๆฌ่ช
Screenshots
Verdict
The clearest difference is ads: Tick at none against Atto's shown. Atto's advantage is update cadence (every 3 days vs every 2 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Tick sells 1 one-off in-app purchase and Atto sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Tick ships an update every 2 months, Atto every 3 days. The most recent releases landed on September 28, 2026 and October 10, 2026 respectively.
| Parameter | Tick | Atto |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 3 days โ better |
| Ads | No โ better | Yes |
| In-app purchases | Yes | Yes |
| Devices | iPhone | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details โ not scored | ||
| Size | 2 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | ็ธ่ถ ้ฑ | Beomjin In |
In-app purchases
Tick
- Tick Pro$2.99
Atto
- Atto Pro$2.99







