I use gaiagps. Its very good for hiking and biking. Should also work for mtb. Had a garmin watch ( fenix 5s) once and that thing sucked hard compared to my phon

I use gaiagps. Its very good for hiking and biking. Should also work for mtb. Had a garmin watch ( fenix 5s) once and that thing sucked hard compared to my phone. Its like a bad phone that can measure your puls.