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I've used all of the apps you mention in your post! Otherwise, I personally love Anki—it might take a bit more work to get it set up right for you, and it's not particularly pretty (unless you put some effort into that as well with addons and whatnot), but it really is an extremely powerful tool. I recommend creating your own deck, which is a lot of effort also, but that's all part of the learning process. Otherwise, you can find a lot of decks for French on Ankiweb, as well.
Anki add-on to help you keep track of your review activity
A possible downside, besides the aforementioned setup, is that it's a bit more of a "serious" app I guess, and it's not particularly gamified beyond just the basic SRS. But with certain addons, that too can be improved. I recommend Review Heatmap to keep you going, Leaderboard if you get motivated by competition, and Auto Ease Factor to avoid ending up in what users call "ease hell".
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