Check out the RUNSTR app. A fitness app built on Nostr also tracks your steps.

RUNSTR is a cardio workout companion. Track your runs, walks, cycles, and hikes — or let them flow in passively from any device or app on Apple Health or Health Connect. Share your workouts, join captain-created events, and earn rewards for every workout you complete.

https://www.runstr.club/

in darkwisp 1.2.1, after you connect/configure a lightning wallet, you get a settings ⚙ option in the wallet screen, and there you can find the payment targets.