I’m not really familiar with memrise even though I’ve used it for Portuguese for a little bit, but ultimately found its srs lacking a bit xD But I’ve been using Kitsun.io for over a year now and it’s great. I wrote about it here - My journey from N5 to N2 in one year (Level 60 post 🎉) and you can see more in this thread^^ MaruMori.io & Kitsun.io - [UPDATE: BLACK FRIDAY FLASH SALE] - Grammar SRS, Grammar Lessons, Reading Exercises, Vocabulary, Kanji and more!
There’s a specific Genki vocab deck there too, which is why I’m recommending it, and a clear timeline too 
This is how the cards look /o/
It includes a bunch of QoL improvements imo, like hibernating words (basically marking as “known”), pushing them to the lesson queue if you want to learn something out of default order and many many more. It’s a paid platform but you can try it for 14 days and decide for yourself:)