Stop being late.
Leave at the right time.

Can't be Late is an iPhone app built specifically for this. It reads your next calendar event, checks live traffic and your current distance to the destination, adds the buffer you configured, and sends a push notification at the exact moment you need to leave. It is free to download and runs on iOS 16 or later.

Can't be Late estimates travel time from your current location to your destination using live traffic data, adds any buffer you've set, and pushes a notification when it's time to head out. You don't have to open the app or check a map yourself.

The reliable fix is to stop estimating departure time in your head. Work backwards from the arrival time instead of forwards from now, build in a fixed buffer, and hand the calculation to something that watches traffic for you. Can't be Late automates all three: it computes the leave time from live conditions and alerts you, so being on time no longer depends on you remembering to check.

Chronic lateness is usually a planning-and-estimation problem, not a motivation problem. Most people plan for the best-case trip, forget the small tasks either side of the journey (parking, walking, finding the room), and don't recheck traffic before leaving. An app that calculates the leave time from live data and alerts you removes the estimation step entirely.

Can't be Late is designed for exactly that. Because it pushes an external alert at the right moment, you don't have to track elapsed time internally or remember to check the clock. Set it up once and the reminders arrive on their own.

Yes. It automatically pulls upcoming events from your iPhone calendar, so you don't have to re-enter destinations. If an event has a location, Can't be Late can time your departure for it.

No. Can't be Late balances accuracy with efficiency and minimises background activity while you're stationary, keeping battery impact minimal.

Yes. Your location is used only to trigger notifications. Can't be Late does not sell, share, or store personal location data.

No. Open it once to configure your events and buffer. After that, reminders fire automatically and you never need to touch the app again.

Any iPhone running iOS 16 or later. There is currently no Android or iPad version.

Can't be Late is free to download from the App Store.

Maps apps can remind you about a trip you've already planned in them. Can't be Late works from your real calendar automatically, applies a personal buffer you set once, keeps rechecking traffic as conditions change, and adds streaks and rewards for actually arriving on time — so it addresses the habit, not just a single trip.