Do what you think is best I mean I'm sure they both have good tips and advice so do what will help you stay motivate and fits your schedule and personality best to make you happy and live fit or say fuck it and do them both

If you have experience doing exercise in the gym or you dont know what to do, keep with his progamm. Where i go the trainer has his upper body just fine, but his lower body look like chicken legs. I have a little ( i was more into swimming ) so i keep asking professional people that i know. Just keep the work and tell him that you want to combine his workout with the app or something like that ( sorry my english is not the best ahaha ) Have a good day in the gym sir

You could always choose to do both

Thanks everyone for the input I guess I will follow his advice for a month and if it shows results I'll stick to or if not then I'll stick it to him lol and yeah I will try to have a good day :D