Calendar Sync Insights
Which calendar app keeps you most up to date?
Timetastic serves over a million calendar feeds every month. Every time Google, Apple or Microsoft re-checks one, we see it, so we can show how fast they really refresh the calendars you subscribe to.
Apple Calendar refreshes about 3.4× faster than Microsoft Exchange
Across the calendars we see, Apple Calendar typically refreshes every 1.8 hrs, while Microsoft Exchange takes around 6.2 hrs.
Live, last 14 days
How the big three are refreshing right now
Average time between fetches, per hour. The dashed line is each app's typical pace.
The league table
Sync speed, ranked
How often each calendar client actually re-fetches a subscribed feed. Shorter is fresher.
The long tail
It's not just the big three
Plenty of other apps quietly subscribe to these feeds, from calendar power-tools to job schedulers and even a family calendar screen on the kitchen wall. Here's a few we spotted.
Most of the long tail keeps pace with the big names, re-checking roughly every hour. The most relaxed we see is Workamajig, which catches up about every 12.6 hrs.
What people share
The calendars teams subscribe to
Of the feeds we serve, whole-organisation calendars are the most popular.
How we know this
Timetastic lets people subscribe to their team's time-off as a calendar feed. Calendar apps (Google, Apple, Microsoft and others) re-fetch those feeds on their own schedule, and we record the moment each fetch happens.
The gap between two fetches is how long your calendar could be out of date. We take the median gap per app over the last 30 days, so a few stragglers don't skew the picture. We see a large slice of real-world traffic, but not all of it, so treat this as a very good guide, not gospel.
Anonymised & aggregated
We only count when calendar apps fetch feeds. We never look at who you are, who's in your calendar, or what any event says. No personal data or calendar content is read, stored, or shown here. Everything on this page is an aggregate.
Made by the team behind Timetastic
Timetastic is the simple way for teams to book and track time off, and it's what powers the calendar feeds behind this dashboard. Give your team a calendar that's always up to date.
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