How can we help?

Furlong reads your running history from Apple Health. If you've just installed it, allow Health access when asked. It will import your past runs and take a moment to work out where you are. If you've never recorded a run on this phone, there's nothing yet to read; the app will start learning from your first one.

That's the app doing its job. Most running injuries are not caused by a single bad session. They build up over a good week stacked on another good week, before the tissue has adapted. Furlong watches how quickly your load is changing, rather than the weekly total alone, so it can ease off before you feel it. Tap “Where did this come from?” on any recommendation to see the reasoning.

Yes. It is a suggestion, not a fixed schedule. Log the run and the plan adjusts around what you did.

Settings → Your long run day. The plan rebuilds around your choice.

Tap “Set a goal race” on the Today screen. Add the distance and date, and the plan works backwards from it, including the taper.

Record it on the run in History. Furlong will hold the plan while it settles, and will say plainly when something needs assessment by a physiotherapist rather than a shorter route. It will not attempt to treat you, and no app should.

No. A watch gives it more to work with (resting heart rate, HRV, sleep), but the app works from your run history alone and treats missing signals as neutral.

Completely. Furlong has no account, no server and no analytics. It contains no networking code at all. Everything stays on your phone. See our Privacy Policy.

Settings → Delete all data. Deleting the app also removes everything.

Settings → Demo data. It loads 18 months of synthetic history so you can explore every screen, and you can switch it off again at any time.

Email us at the address above with your device model and iOS version and we'll help.