I’ve been using SuperMemo for Windows every day for 17 years but I’ve started using Anki so I can do some foreign language flashcards on the go (I add them to SuperMemo after the interval gets to more than 1 month). Anki is easy and convenient, SuperMemo is extremely powerful and versatile when it comes to easily adding media like pictures to your cards. I say go with whatever you are most likely to not quit doing. Either choice would be fine, although I’m obviously Team SuperMemo all the way