android phone for nav

I recently got a new phone making my old one redundant, I always used my old phone for cycle navigation with cycle.travel in conjunction with maps.me which works really well but does not give turn by turn instructions, i had planned to use my new phone in the same way. However rather than leave my old phone to retirement in a drawer somewhere I could use it as a stand alone cycle computer, and leave my new phone in my pocket, its waterproof to Ip68, the battery lasts all day for nav, so apart from maps.me is there any other software i should be installing on my old phone to use as cycle computer? also is there any software i could put on to get turn by turn instructions with cycle.travel?