Yokoso is a Japanese-learning app built for people living real life in Japan. Questions, bugs, or ideas — email and you'll get a reply from the person who builds it.
Is it really free? Yes — every learning feature, forever. No ads, no streaks, no locked content. Optional supporter contributions exist because some people ask to help; they unlock nothing.
My devices show different progress. Open Settings → Sync on both devices and confirm they show the same fingerprint word. Then bring the app to the foreground on each — sync runs automatically. Still stuck? Email with both fingerprints.
How do I import WaniKani progress? Settings → WaniKani → paste a read-only API token from wanikani.com/settings/personal_access_tokens. Progress re-syncs daily.
How do I delete my data? Settings → "Reset all progress" erases the device. For synced data, email your sync fingerprint and it will be purged.
Privacy policy — short version: no analytics, no tracking, no third parties; your data lives on your device.