For iPhone

The route is built into the app and your phone finds its position from satellites, not phone masts. You can see exactly where you are on the West Highland Way even with no signal at all.

Tell the app where you are walking to each day — Drymen on day one, Rowardennan on day two — and it guides you there. You always know how far is left today, how the stage is going, and how far remains of the whole walk.

See the climbs and descents for the full walk and for each day — distance, ascent, descent and the high point — so you know which days will be the toughest before you set off. On iPhone, climbs are named and given a difficulty.

Took a wrong turn, or staying somewhere off the trail? The app shows you the way back to the route line, so you can rejoin it where you left off or head straight to it in the morning.

Collect animated stamps as you progress along the West Highland Way. Missed a checkpoint — a late start, a bus into the trail, a day the phone stayed in the pack — and you can still recover it.

A ready-made packing list you can edit to suit your walk. Tick items off as they go into the rucksack so nothing gets left behind.

Write up each day and add your own photographs as you go. When you are home, export the whole journal as a PDF to print or share.

Heading north from Milngavie to Fort William, or south from Fort William to Milngavie? Switch direction and the guidance, distances and daily goals all follow the way you are actually walking.

Show distances in miles or kilometres, and heights in metres or feet. Pick whichever you are used to.

Switch between a light and a dark view for early starts, late finishes and bright days on the hill.