Mobile data, battery and what runs offline

How much mobile data tracking uses, what works with no signal, and how to keep both data and battery in check.

Updated 28 August 2026

A common worry before a big day out: will tracking burn through my data or battery? Here's the honest answer for a ride or a run.

Data: tracking is light

  • The biggest one-off download is an event's route and map, which happens when you register or first open the event. Do that on Wi-Fi beforehand and it's cached for the day. A Just Ride has no such download.
  • While you're out, the app sends your position as small updates — light on data.
  • With no signal, tracking uses no data at all. Your points are saved on the phone and uploaded later when you reconnect. See What happens when I lose signal?.

So beyond that first route download, a typical activity uses very little data.

Watching uses more than being tracked

If you're watching other people live — rather than being tracked yourself — that streams a live map and updates continuously, so it uses more data, much like any live-map app. On the move, prefer Wi-Fi for long watching sessions.

Battery: honest about the cost

Tracking uses your phone's GPS for the whole activity, and GPS is a real drain — there's no way around that on a phone. What you can control is the recording rate: pick a battery mode to match how long you'll be out, and let the app drop to a more economical mode as your battery falls. For a rough forecast of how long each mode lasts, and tips to stretch it further, see aster-track.com/battery-use and Tips for a reliable track.

What works with no signal

Almost everything you need on the day:

  • Starting and finishing an activity
  • Recording your full route
  • Pausing and resuming
  • Your cached offline map and route
  • Crash detection and raising an Alert

Only signing up, your first event download, and live updates reaching watchers need a connection. Everything inside your activity is kept on the phone and syncs when you're back in range.

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