Does Fenzly record my trips?

Yes, by default. A new account starts in Detailed mode: Fenzly detects that you start moving and records the trip without intervention, which is what lets your timeline build itself. The Recording mode can be changed at any time in Settings:

• Detailed: your movements are recorded automatically, on foot, running, by bike or by car, and the transport mode is recognised from the trip. You can also start a trip by hand from the map with “Start trip”.
• Simple: Fenzly only notes your arrivals and departures at your favorite places. No trip, very little battery.

A recorded trip keeps its route, duration, distance, speeds and elevation. You find it in your timeline and in the History tab, Trips view. It lives only on your phone, and you can correct it, for instance to say it was a bus or a train, or delete it.

Your people only see a trip if you share “Everything” with their circle. They then see a line in their feed, “Trip 22 min · 9.4 km”, with no detail. If you turn on Detailed trips for that circle, they can also open the trip: route, speeds, elevation. Everything leaves end-to-end encrypted; the server knows nothing of it. The guide Recording and sharing my trips details the settings.