I use Pillo. You can track a lot of stuff in the app and you can set up titrating dosages. You add a medication, make it to whatever method of application (injection, pill, etc), put your dosage required (can be injection, mcgs, mgs, units, whatever makes it easy), you can also set up titrating doses like first 4 weeks of reta at 2mg, then 3mg for 4 weeks, then 4mg indefinitely,etc.. Then you pick the frequency, everyday, certain days, certain dates (great for cycles), then pick your times for adminstering the meds. You will get a reminder for every medication.
There are other things like monitoring shot locations and stuff to aid in not pining the same location all of the time. Hope that helps, check it out.