App or resource to keep track of JLPT words studied (like a checklist)

I would like to have a way to track the JLPT words I already studied. I’m looking for some sort of checklist with percentages. I know it would be imprecise since there are no official word lists for JLPT but it would help me stay motivated.

I’m currently using the Japanese iOS dictionary app with color labels but unfortunately the app can’t easily compute percentages.