Zero In: Shared Group Timer

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Everyone
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Everyone
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About this app

Zero In is a shared timer for your family, team or crew. Start a countdown on your phone, and everyone in your team sees it tick down on theirs. When time's up, everyone gets the alarm, wherever they are.

It started with a batch of bread dough. The timer was set at home, the baker was out, and nobody at home knew the dough was ready. Zero In fixes that. It's a group timer for anything where more than one person needs to know when time's up: rising dough, drying paint, a workout, the laundry, a parking meter, a shift change.

HOW IT WORKS
• Make a team and invite people with a link. They open it, and they're in.
• Save timers such as "Dough" or "Second coat", private or shared with a team.
• Start a run for just you, the whole team, or some of it. Everyone in the run sees the same countdown.
• Watch the countdown on your lock screen while it runs.
• When the run ends, everyone in it gets a "Time's up" alarm.
• Need something quick? Start a one-off timer right from Home.
• See every finished run in History, filtered by team, timer or sequence.

MADE FOR GROUPS
• Anyone in a run can pause, resume or cancel it, and the others get a notification saying who did it.
• Run several timers at once, and choose who is in each run.
• Sequences chain timed steps with tasks in between. Someone taps "On It", then Done, and the next step starts.
• Hand a team to someone else with Make owner.

THE ALARM
• Zero In shows a full-screen alarm, even on the lock screen, until you tap Stop.
• Pick one of Zero In's alarm sounds, or choose a phone alarm sound.
• Quiet alarms: switch off ringing for an hour or until morning, and still get the notification.
• Mute a timer whenever you don't need its alerts.

PRIVATE BY DESIGN
• No sign-up: no email, no phone number, no password. Just pick a name.
• Optionally save your account with Google to keep it on a new phone.
• Only people you invite can join your team. Owners approve returning members and can remove anyone.
• Hide timer names on your lock screen.
• Block or report anyone, right in the app.
• No ads and no tracking.

PLEASE NOTE
Alerts travel over the internet and can arrive late or not at all, for example when a phone is offline or in battery saver. Don't use Zero In for emergencies, medical timing or anything where a missed alert could cause harm.

Questions or ideas? Email apps@grebenniki.farm or visit apps.grebenniki.farm/zero-in.
Shared countdown timer for family and teams. Everyone gets the alarm at zero.
Updated on
Nov 5, 2026

Data safety

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 parties
    Learn more about how developers declare sharing
  • This app may collect these data types
    Personal info, App activity, and Device or other IDs
  • Data is encrypted in transit
  • You can request that data be deleted

What’s new

• Live countdown on your lock screen while a run is going.
• Run history: see finished runs and sequences on Home, or open History and filter by team, timer or sequence.
• Quiet alarms: turn alarm ringing off for an hour, until morning or until you turn it back on. Notifications still arrive.
• Make owner: hand a team to someone else, or pick the next owner when you leave.
• Fixes: alarm Open works on a locked phone; sound previews stop.
Content rating
Everyone
Users Interact
Learn more

App support

About the developer
GREBENNIKI FARM LLC
dev@grebenniki.farm
1645 Anderson Creek Rd Talent, OR 97540-7721 United States
+1 541-708-1858