Potential to be one of the best
The biggest thing holding it back however is the set list unfortunately. It does not have the full N1 and N2 list which is understandable since they are a small team and there is A LOT of N1 words and kanji. Maybe there’s a possibility of releasing it in batches instead of all at once, that would make N1 a little less daunting.
One thing I wish it would have though is the option to not repeat kanjis/words if they’ve already been shown once. It does make reviewing big kanji set lists repetitive if trying to test ourselves but other than that this app is great for intermediate level learners and until they can achieve the full set list it has the potential to be a must pick app for Japanese kanji learning.