What would I need besides the usual cycling related apps if I

An old smartphone

>>1085511
Data connection Strava doesn't work off wifi

>>1085521
Sure it does. All you need is the GPS to work. When I forget my bike GPS and use my phone I usually put it in airplane mode to conserve the battery when I use Strava. It just won't upload your ride till it has some kind of data connection which can be wifi.

A decent battery in the phone is one thing you need.

Heart rate monitor?

Cadence sensor?

I guess it depends on what data you wanna see on the display.

Oruxmaps with google maps sources enabled so one can download offline chunks of your region.

100% offline

>>1085511
>usual cycling related apps
? ? ?

Battery pack if you want to have the screen on your phone during the ride to see stuff from it. If you only care about tracking and not seeing stats while riding all you need is whatever sensors you want.

>>1085535
Gay porn

>>1085588
Don't be an idiot. If you're on your bike you'd want grindr since then you can turn up to boypussy lane on your single speed