Originally Posted by
jadocs
Sounds like a Quad Lock is what you are looking for.
If you're asking for opinions of why a computer over a phone: 1. Battery limitations, 2. Ensuring phone is available for emergencies and not dead because it's been tracking a ride.
Definitely not looking for a mount for the phone, for the very reason you mentioned. Looking for a connected head unit to use the phone's tracking features without having to keep the phone "live" for the entire ride.