I use an app called Medisafe to give me my medication reminders. It’s useful because it tracks my doses and also tracks how much I have left so I know when to order refills and so on. I’ve been using it for years.
Unfortunately it has a critical problem in that it only sends three easy-to-miss reminders spaced ten minutes apart with no way of configuring it. So often I’ll end up taking my medication a few hours later than the scheduled time, because I head to bed and notice the pending reminder that I meant to fulfill.