As far as language learning apps go I've gotten way more milage out of Clozemaster than I ever did out of Duolingo. At least for learning vocabulary Clozemaster

As far as language learning apps go I've gotten way more milage out of Clozemaster than I ever did out of Duolingo. At least for learning vocabulary Clozemaster's combination of spaced repetition and cloze-completions helps immensely (especially using it on free text input mode instead of multiple choice). That said Duolingo does help a lot more with the dead basics. For context I could already speak Mandarin because I grew up bilingual but always found that I've have to laboriously re-learn vocabulary for literacy. Clozemaster seems like the most sustainable way for me to maintain an expanded vocabulary (in both Traditional and Simplified characters) that I've found. I just do Clozemaster every time I sit on a toilet, pretty easy habit cue, if a bit gross.