: Official accounts sync progress across devices. Modified versions often struggle with server-side features, meaning your "full" experience might be limited to a single device and lack cloud backups.
: Because these versions are modified, they cannot be updated through official channels. As FluentU releases new content or fixes bugs, the "subscribed" APK remains frozen in time, eventually becoming incompatible with newer Android versions. : Official accounts sync progress across devices
In the end, the most "fluent" version of any language comes from consistent practice—ideally through a secure and supported platform that keeps your data safe and your lessons up to date. : Official accounts sync progress across devices