Atto
Contains ads
Everyone
info
10+
Downloads
About this app
Ticket drops are decided in milliseconds, not seconds.
The queue opens on the booking server's clock, not your phone's. The two usually differ by tens to hundreds of milliseconds, and that gap decides your place in line.
Atto reads that server's clock directly, and shows exactly how precisely it read it.
Server time, measured
The HTTP Date header only has one-second resolution, so a single read is only good to ±500 ms. Atto probes many points inside the second, 137 ms apart. Once the offset narrows, it aims at the instant the server's second ticks over, and the error shrinks to the level of the round trip.
No hidden error
Instead of a vague "high accuracy" badge you see the real figure, like ±23 ms, along with the sample count and the fastest round trip.
Cached responses are thrown out
When a CDN answers instead of the origin, the time inside is frozen at the moment it was stored. Those responses never enter the average.
Device clock drift, corrected
Phone clocks drift by seconds a day. Atto measures the slope between syncs and corrects for it up to now.
A timer over other apps (PiP)
Press Start and a small window floats over other apps with the time left to a tenth of a second. Watch the booking app or browser without missing the moment. Drag the window wherever you like.
Haptics and sound
A buzz every second from the lead you choose, and a strong hit at zero. Pick Crescendo, Metronome or Zero only, and turn on sound if you want it.
Network check
Compare Wi‑Fi and cellular side by side: download speed, response time to the booking site, and response time and jitter under load.
Reminders and a home-screen widget
Get a notification or alarm before the sale, and see the target time and time left on your home screen.
Practice mode
Rehearse on a mock booking page with a queue, security code and seat map, just like the real thing. You can also measure how long you take to tap after the buzz.
Time sources
More than 300 sites across 14 regions: Ticketmaster, AXS, Live Nation, SeatGeek, Interpark, e+ and more, plus course registration and limited drops. Standard-time servers are included, and you can enter any address yourself.
Free and paid
Everything you need to get the ticket is free: sync, drift correction, the on-screen countdown, haptics, every time source and practice mode.
Watch one rewarded ad to open one countdown in the PiP window, or make a one-time purchase to use PiP any time without ads. Not a subscription.
Atto only sends HEAD requests to read the time. No account is required, and it never touches your booking.
English, 한국어, 日本語
The queue opens on the booking server's clock, not your phone's. The two usually differ by tens to hundreds of milliseconds, and that gap decides your place in line.
Atto reads that server's clock directly, and shows exactly how precisely it read it.
Server time, measured
The HTTP Date header only has one-second resolution, so a single read is only good to ±500 ms. Atto probes many points inside the second, 137 ms apart. Once the offset narrows, it aims at the instant the server's second ticks over, and the error shrinks to the level of the round trip.
No hidden error
Instead of a vague "high accuracy" badge you see the real figure, like ±23 ms, along with the sample count and the fastest round trip.
Cached responses are thrown out
When a CDN answers instead of the origin, the time inside is frozen at the moment it was stored. Those responses never enter the average.
Device clock drift, corrected
Phone clocks drift by seconds a day. Atto measures the slope between syncs and corrects for it up to now.
A timer over other apps (PiP)
Press Start and a small window floats over other apps with the time left to a tenth of a second. Watch the booking app or browser without missing the moment. Drag the window wherever you like.
Haptics and sound
A buzz every second from the lead you choose, and a strong hit at zero. Pick Crescendo, Metronome or Zero only, and turn on sound if you want it.
Network check
Compare Wi‑Fi and cellular side by side: download speed, response time to the booking site, and response time and jitter under load.
Reminders and a home-screen widget
Get a notification or alarm before the sale, and see the target time and time left on your home screen.
Practice mode
Rehearse on a mock booking page with a queue, security code and seat map, just like the real thing. You can also measure how long you take to tap after the buzz.
Time sources
More than 300 sites across 14 regions: Ticketmaster, AXS, Live Nation, SeatGeek, Interpark, e+ and more, plus course registration and limited drops. Standard-time servers are included, and you can enter any address yourself.
Free and paid
Everything you need to get the ticket is free: sync, drift correction, the on-screen countdown, haptics, every time source and practice mode.
Watch one rewarded ad to open one countdown in the PiP window, or make a one-time purchase to use PiP any time without ads. Not a subscription.
Atto only sends HEAD requests to read the time. No account is required, and it never touches your booking.
English, 한국어, 日本語
Booking-server time to the millisecond, with a timer floating over other apps.
Updated on
Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
- No data shared with third partiesLearn more about how developers declare sharing
- This app may collect these data typesLocation, App activity and 2 others
- Data is encrypted in transit
What’s new
Atto is now on Android.
• A countdown set to the booking server's clock, to the millisecond
• A PiP timer that floats over other apps, with haptics to zero
• Reminders and a home-screen widget
• Practice mode on a mock booking page
• A countdown set to the booking server's clock, to the millisecond
• A PiP timer that floats over other apps, with haptics to zero
• Reminders and a home-screen widget
• Practice mode on a mock booking page
App support
About the developer
인범진
bumjin1013@gmail.com
국회대로 56길 4
A동 901호
영등포구, 서울특별시 07247
South Korea