Support

Updated September 30, 2026

Questions about Sumi, a reading, or a purchase? Write to us with the details that will help us reproduce the issue.

Report a problem

Include your device, iOS or iPadOS version, app version, study level and the kanji, kana or word. Screenshots are useful. Please leave out passwords, payment details and private notes.

Restore a purchase

Open Settings → Sumi Plus → Restore Purchases in the app, using the Apple Account that made the purchase.

Manage or cancel

Open the Settings app → your Apple Account → Subscriptions → Sumi. Removing the app or resetting progress does not cancel a subscription.

Your learning data

Export your progress from Sumi Settings. Reset Learning Progress clears reviews, mastery and streaks; bookmarks, notes and preferences remain. Remove saved kanji and notes individually. Manage Sumi’s iCloud storage in the Settings app.

Voice and language

Use Sumi’s voice settings to choose an available Japanese system voice. Additional voices can be downloaded in the Settings app. Siri voices are not always available to apps. To change Sumi’s language, tap App language in Sumi’s Settings, or open the Settings app → Apps → Sumi → Language (on iOS 17: Settings → Sumi → Language).