In the car

Trips

A trip is a CSV written on the phone at one sample a second. Uploading it is a separate action, and it never happens on its own.

Recording

On the dash, tap Record. The label becomes Stop plus a row count so you can see it is actually writing. The foreground service keeps polling with the screen off; leave RevDash as the navigation-style notification if Android asks.

Stop when you park. A dialog titled Trip recorded offers:

Save CSV: every column, every sample. Opens in a spreadsheet.
Save KML: the route as a line, with start and end placemarks. Only offered if location was recorded. Opens in Google Earth or Maps.
Done: keep the trip in app storage without exporting a file.

The old flow shoved the system file picker in your face the instant you stopped, one format, accept-now-or-lose-it. This one says what was recorded and lets you take either file, both, or neither.

GPS is optional

If you granted precise location, the log gains latitude, longitude, altitude, speed, bearing and accuracy next to the OBD columns. That is what draws the route on replay and what makes a KML possible.

If you declined, you still get every reading the ECU gave you, just no map. The export dialog says so, rather than offering an empty KML. Live location is never streamed anywhere; coordinates only go into the file on the phone, and into a trip you later choose to upload.

Fixes at 0,0 are dropped. Jumps that imply more than about 400 km/h are excluded from distance, so a tunnel glitch does not inflate the drive.

What a CSV contains

Timestamp, ISO time, then one column per parameter that was actually polled, in the units the profile was set to. GPS columns only if you granted location. The header is ordinary CSV, which is why the same file is what gets uploaded, compacted, and handed back as a download from the replay page.

KML

Plain KML 2.2: a LineString, start and end placemarks, a TimeSpan. Not Google’s gx:Track extension, a file that opens everywhere beats one that animates in one viewer. Derived from the CSV, so an old trip can still become a map.

Uploading is not recording

The trip stays on the phone until you sign in under Settings → Cloud and tap Upload now. There is no background sync and no “wait for Wi-Fi” pass. Hitting the free cloud cap does not stop recording; it only stops uploads for that month. See Cloud & replay.