Stimulant with longer halflife

Hello folks

I started taking Rilatin long acting 5 mg 3 times a day but I would rather have something that works longer (preferably) the entire day. It's annoying when my symptoms slowly come back after 2-3 hours and I need to take a follow-up dose everytime. What methylphenidate stimulant works longer so I have to only take it 1-2 times and it spans the entire day. Thanks in advance.