Rainfly
Should the rainfly go on tonight?
Rainfly reads the night's forecast for your campsite and answers with a reason — “Dew likely by 4 AM”, “Rain 35% after 2 AM” — then in the morning tells you when the tent will be dry enough to pack. Deliberately narrow: no radar, no maps, no week ahead, only what tonight means for your gear.
A verdict, with the reason
Independent checks for storms, rain, dew, frost and cold; any one puts the rainfly on, and the app names the one that matters most and when it fires.
A dry-by time
From sunrise it estimates when the tent will be dry enough to pack up and move on.
Works where the signal doesn't
Download a trip's nights before you leave and the verdict holds in the backcountry. It rides on the watch face and the iPhone Lock Screen too.
A dew diary
The dew forecast other apps don't make, checked against your own mornings, so the app learns the dew-point gap that fits your tent.