Intelligence · On-device
The thinking happens on your phone.
Every other hiking app sends your walk to a data centre to make sense of it. Ours doesn't — the model runs on your handset, so it still works in Knoydart with no bars, and your hiking history never leaves the device.
Works where you actually are
Cloud AI in a hiking app switches off exactly when hiking gets serious. Ours doesn't — there is no round trip to fail, so it works the same in a valley with no bars as it does at home.
Your history stays yours
A GPS history is your home address, your routine and your movements. Nothing about your walks is sent anywhere to be analysed — not 'we don't sell it', it doesn't leave.
No data centre does the thinking
Inference runs on a device you already own and already charge, rather than in a building drawing grid power and water.
How it works
A workflow built for UK hills.
Download the guide once
An optional download over Wi-Fi puts the model on your phone. It's a deliberate choice, not something bundled into the app — see the size before you start.
Leave the signal behind
Everything that follows runs locally. No account lookup, no upload, no waiting on a connection you don't have.
Ask about your own walking
Your logged hikes, your pace, your gear — read on the device, by a model on the device.
Nothing goes back
No prompt, photo or route is uploaded, and none of it is used to train anything.
Built for hikers
Everything you need on and off the hill.
Private
Photos stay on the phone
Photos you take to report a trail condition are read on the device and never uploaded. The report goes; the photograph doesn't.
Offline
No round trip to fail
There is no server call to time out, so there is no degraded mode. It behaves identically with and without a connection.
Yours
Nothing trains on you
Nothing you type, say or photograph is used to train a model — ours or anyone else's.
Battery
Honest about the cost
Running a model on your phone uses battery, so it runs in short bursts when you ask — never in the background, and never while it would compete with recording your walk.
Open
Built on open weights
The model is Google's Gemma, used under its open licence — listed in the app's open-source licences alongside everything else Trailwise is built on.
Optional
Entirely opt-in
The model is a download you choose. Skip it and Trailwise works exactly as it does today.
Start your fell archive
The hills are waiting. Start tracking today.
Free to start — no card required. Build the trail history that grows with every season.