Comparison

Tick vs Atto

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

Tick

Features
Read full description

Tick β€” 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 Β· NTP standard time: align to atomic-grade time in one tap, and see how many milliseconds your phone is off Β· Website sync: read the time returned by a website you choose, to align to "that platform's clock" Β· Once calibrated, every countdown uses the corrected reference time A MILLISECOND COUNTDOWN YOU CAN READ Β· Set a target moment; a big countdown ticks to 0.001s in the final minute Β· Live on the Dynamic Island / Lock Screen β€” no need to stare at the app Β· Strong haptics + a notification right before zero Β· Floating millisecond window (advanced): stays on top even after you switch apps TIME ONLY β€” NEVER PURCHASING Β· Tick only provides accurate time and countdown reminders Β· It does not participate in, act on behalf of, or automate any purchase or checkout Β· No account, no ads, no social TICK PRO (one-time purchase, yours forever) Β· Unlimited countdowns: save as many target moments as you like Β· All color themes: light up the Island and Lock Screen Β· Support an indie developer: no subscription, no ads Catching the moment starts with getting the time right.

About

Atto

This utility app precisely measures and displays server clock times for time-sensitive events like ticket drops. It offers advanced features to correct for device drift and ensure accurate countdowns, even while using other applications.

Highlights
  • Server clock synchronization
  • Millisecond precision countdown
  • Device drift correction
  • Picture-in-Picture mode
  • Haptic and sound alerts
  • Practice mode for timing
  • Supports over 300 time sources
Features
Read full description

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 Β±500ms 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: Β±23ms. 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, ν•œκ΅­μ–΄, ζ—₯本θͺž

Screenshots

Tick4 screens
Atto4 screens

Verdict

The call

The clearest difference is ads: Tick at none against Atto's shown. Atto's advantage is update cadence (every 4 days vs every 2 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

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.

UpkeepUpdate frequency

Tick ships an update every 2 months, Atto every 4 days. The most recent releases landed on October 28, 2026 and November 4, 2026 respectively.

Scorecard2 real differences Β· 6 level
Tick versus Atto: the parameters behind the verdict, then further details
ParameterTickAtto
PriceFreeFree
Positive reviewsβ€”100.0% of reviews
Update frequencyEvery 2 monthsEvery 4 days β€” better
AdsNo β€” betterYes
In-app purchasesYesYes
Monetizationβ€”Free with in-app purchases
DevicesiPhoneiPhone
Requires iOS17.017.0
Further details β€” not scored
Size2 MB11 MB
Age rating4+4+
Developerη›ΈθΆ… ι‚±Beomjin In

In-app purchases

1 purchases

Tick

One-time1
  • Tick Pro$2.99
1 purchases

Atto

One-time1
  • Atto Pro$1.99

Questions

Is Tick free?
Tick is free to download, with in-app purchases available.
Is Atto free?
Atto is free to download, with in-app purchases available.
Do Tick or Atto have ads?
Atto shows ads; Tick does not.
Which is updated more often, Tick or Atto?
Tick ships an update every 2 months, and Atto every 4 days. Most recently, Tick was updated on October 28, 2026 and Atto on November 4, 2026.

Other comparisons