LeaveBy: Traffic-Aware Alarm

Stop setting alarms for the wrong time.

LeaveBy is a traffic-aware alarm for people who actually need to go somewhere. Instead of guessing when to leave, you tell LeaveBy when you need to arrive — and it watches live traffic, transit delays, and your prep time to ring you at exactly the right moment.

No more "I'll leave at 8:15" only to hit unexpected traffic and arrive 20 minutes late. LeaveBy recalculates in the background and rings earlier when the roads get worse.

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HOW IT WORKS
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1. Pick a destination (Google Places search, or save Home / Work).
2. Set your arrival time.
3. Tell us your prep time — 15 min to shower, 30 to get the kids ready, whatever you need.
4. Choose your mode: driving, transit, walking, or cycling.
5. LeaveBy monitors traffic and rings when it's time to leave.

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FEATURES
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• Traffic-aware alarm — the alarm time adjusts itself as traffic changes
• Live traffic from Google Maps, updated continuously as departure approaches
• Arrival-time-first — set when you need to be there, we compute when to leave
• Four travel modes: driving, transit, walking, cycling
• Full-screen alerts that actually wake you, even through Do Not Disturb
• Prep-time buffer so "leave time" already includes your shower, coffee, commute to the car
• Repeat on any days — weekdays, weekends, one-off
• Calendar view of everything you have coming up
• Saved places — Home, Work, anywhere you go often
• Offline-first — your alarms fire even with no signal
• Clean Material 3 design, dark mode, dynamic type
• Sign in with Google or email; your alarms sync across devices

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WHO IT'S FOR
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• Commuters who get burned by rush-hour variance
• Parents juggling school drop-offs and appointments
• Anyone who's been late to an interview because "the map said 22 minutes"
• People with ADHD or time-blindness who need the alarm to think for them
• Transit riders dealing with unpredictable schedules

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PRIVACY
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Your location is used only to calculate travel time. We never sell your data. You can delete your account at any time from inside the app or from our website.

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QUESTIONS?
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We'd love to hear from you: songyue.support@gmail.com

Stop setting alarms for wake-up time. Set them for the only time that matters — when you need to walk out the door.