Quick answer: Google Calendar does not calculate leave-by from live traffic. “Time to leave” alerts usually come from the Google app / At a Glance or Waze calendar sync, and they skip events with no address. BoardSpy Calendar Alarms read the same Google Calendar (read-only) and fire a leave-by for places plus a meeting alarm for video calls.
Disclosure: BoardSpy is our product. Google Calendar, the Google app, At a Glance, and Waze are described from public help docs and product UI; verify current behavior on Google’s and Waze’s sites.
People searching for Google Calendar time to leave or add travel time to Google Calendar are usually trying to solve one job: get a reliable heads-up before a meeting with a place — and often before a Zoom call too. Google’s stack splits that job across Calendar, Maps, the Google app, and optionally Waze. BoardSpy keeps the calendar as the calendar and owns the leave-by / meeting-alarm layer.
Side-by-side
| Capability | Google Calendar / Google TTL stack | BoardSpy Calendar Alarms |
|---|---|---|
| Primary job | Calendar + optional Time to Leave from Google app / Waze | Leave-by and meeting alarms from calendar events |
| Calculates leave time from traffic | Not inside Calendar’s Add travel time (manual duration). TTL via Google app / Waze when an address exists | Yes — from saved commute origin + live Maps traffic for place events |
| Needs a street address | Yes for travel-based Time to Leave | Place events need an address for leave-by; no-place events still get a meeting alarm |
| Video / Zoom / Meet (no place) | No travel-based leave-by | Meeting alarm at start minus lead time |
| Edits your calendar | You manage events in Calendar | Never — read-only Google Calendar |
| Recurring weekday commute | Not Calendar’s core job | Separate schedule-aware commute alerts; Calendar Alarms cover dated events |
| iOS / Android | Calendar everywhere; TTL behavior varies by device and Google / Waze setup | Yes — BoardSpy app on iOS and Android |
| Turn-by-turn | Open Maps or Waze | Opens Maps/Waze — not a GPS |
What Google Calendar actually does
Add travel time in Google Calendar is a manual block you pick (for example 15–60 minutes). It does not look up the event address and compute a live drive. That distinction is covered in detail in add travel time to Google Calendar.
Time to Leave notifications on Android often depend on the Google app having Calendar permission (Google app permissions help) or on Waze calendar sync with Time to leave reminders. Those paths need a navigable address, always-on location, and still fail intermittently for many people — see Google Calendar Time to Leave not working.
When to use Google’s / Waze Time to Leave
Use Google’s stack when the event already has a full street address, you are fine depending on Google app or Waze background behavior, and you only need a leave-by for in-person appointments. Keep Calendar for scheduling; keep Maps/Waze for the drive.
When to use BoardSpy Calendar Alarms
Use BoardSpy when you want one place in the app for leave-by on place events and meeting alarms on video calls, with per-meeting on/off, without editing the calendar. Connect Google Calendar read-only, keep your saved commute origin for travel math, and still open Maps or Waze when you leave. Start at apps or see the demo on the homepage Calendar Alarms section.
Related reading
Add travel time to Google Calendar · Google Calendar Time to Leave not working · Apple Calendar Time to Leave not working · BoardSpy apps · Homepage Calendar Alarms
How to read this comparison
Google’s products change. We describe Calendar travel time as a manual duration control and Time to Leave as a Google app / Waze-adjacent notification path based on current public help pages — not as a claim that Calendar itself is a traffic engine. BoardSpy is leave-by and meeting alarms, not a Google Calendar replacement and not turn-by-turn navigation.
Frequently asked questions
Does Google Calendar automatically add travel time from Maps?
No. Google Calendar's Add travel time control is a manual duration block (for example 15, 30, 45, or 60 minutes). It does not auto-route from the event address using live traffic. See add travel time to Google Calendar.
Where do Google Time to Leave notifications actually come from?
On many Android phones they come from the Google app / At a Glance, or from Waze after you sync your calendar — not from a first-class Google Calendar setting like Apple Calendar's Time to Leave. Official references: Google app permissions and Waze Time to Leave help.
Do Google or Waze Time to Leave alerts work for Zoom meetings?
No. Travel-based Time to Leave needs a navigable street address. Video meetings without a place do not get a leave-by. BoardSpy Calendar Alarms send a meeting alarm before those events start.
Does BoardSpy edit my Google Calendar?
No. BoardSpy only reads calendar events you choose to use. It never creates, edits, or deletes events. Disconnect anytime from the same screen.
Should I replace Google Calendar with BoardSpy?
No. Keep Google Calendar as your calendar. Use BoardSpy for leave-by and meeting alarms, then open Maps or Waze when you drive.
References
- Manage your Google app permissions — Google help on Calendar permission and Time to leave via the Google app.
- Waze: Get a reminder when it's time to leave — official Time to leave reminder settings.
- Waze: Sync your calendar — calendar sync for event leave reminders.
- Add travel time to Google Calendar — manual travel blocks vs automatic leave-by.
- Google Calendar Time to Leave not working — intermittent TTL causes and workarounds.
- BoardSpy for iOS and Android — product download page including Calendar Alarms.
Get BoardSpy on your phone
Leave-time commute alerts plus Calendar Alarms — free to start on iOS and Android.