... previously learned in other ways (for example, from a language school or online lessons), but not necessarily for learning at a conversational level. 1 Do you have experience/know of other tools or apps that are more effective alternatives? 2 What do you personally miss about these language learning apps, or what are your biggest struggles in learning languages? 3 What languages are attractive to you to learn? 4 The last but not least: Does it make sense to build another ... ... They cover multiple languages and are very very good. Comment from Edward Michaelson(@emikes919): ANKI is the only answer. It is simply the closest thing to uploading vocabulary to your brain like Neo in the matrix. I suggest downloading Fluent