oki have a question about these, will they work in my pocket or backpack while on my bike?

i want to get one to take on road trips in the car and on my bike/rollerblades to track my distance/speed so a small one is better but im not sure about what one

i like the freedom key chain for obvious reasons and the Mainnav MG-950D because i can attach it to my bike

any help would be greatly appreciated