Support
Need help with Sumigo, vocabulary cards, review progress, dictionary content, grammar, or kanji tools?
Contact
Email lion.knoche@gmail.com with a short description of the issue, your device model, and your iOS version.
Data and Accounts
Sumigo works without an account. Learning data is stored locally on your device. Deleting the app removes its local app data from the device.
Open Data
Dictionary, kanji, grammar, sentence, and stroke-order content comes from open datasets credited in the app under Data Sources & Licenses.