Cairn

Some walks give you nothing but a good stretch of legs. Others hand you a small grey stone, warm from the path, that fits your palm like it was waiting there for you. Cairn is a quiet home for those roadside treasures — the speckled granite from a riverbank, the chalky white pebble from a cliff walk, the odd flat skimmer you never quite threw. Each stone you keep becomes a gentle marker of where your feet have been.

Open the app to a soft, sand-toned shelf where every pebble you have saved sits waiting. Add a new find with a photo, a name, the place you picked it up, and a note about the day; sort your shelf by texture, colour, or the walk it came from, and search back through old finds when a memory tugs. The heart of Cairn is the Stacking Ground, where you balance your saved stones one on top of another to raise a slow, wobbling tower — a personal cairn that grows taller with every walk you take. A weekly Wander prompt nudges you outside with a small theme to hunt for, so the collection keeps breathing.