Delete your Sumi account and data
How to delete your Sumi account and the data attached to it — with or without signing in
2026/09/15
Last updated: September 15, 2026
This page explains how to delete a Sumi account and the data attached to it. You do not need to be signed in to read it, and you do not need an account to make a request. It applies to the Sumi apps for Android and iPhone / iPad, the Chrome, Firefox and Safari extensions, and the mangasumi.com website.
For what we collect in the first place, see the Privacy Policy.
1. If you can sign in: delete the account yourself
- Sign in at mangasumi.com.
- Open Settings → Security.
- Choose Delete account, then confirm.
The deletion runs immediately and cannot be undone. Cancel any active subscription first if you want it stopped — deleting the account does not cancel a subscription that Apple or Google bills (see What we cannot delete for you).
2. If you cannot sign in, or never made an account
Email privacy@mangasumi.com with the subject Delete my data, and tell us which of these applies:
- You had an account — write from the address the account uses, or name that address. We may ask you to confirm from it before we delete anything; that check exists so nobody can delete someone else's account.
- You only bought something — give us the Google Play order number (Play Store → Payments and subscriptions → Budget and order history) or the Apple order ID from your App Store receipt. That is what lets us find the purchase record.
- You never signed in and never bought anything — then the only thing we hold is a random per-install identifier and the page counters attached to it. Nothing in it names you, and we have no way to look it up from an email address. Uninstalling the app ends the collection, and the install's records fall out of use. Write to us anyway if you would like them removed and can tell us roughly when and where the install was used.
The general support inbox is hello@mangasumi.com if you would rather use that.
3. What deleting the account removes
Deleting a mangasumi.com account deletes, at once and permanently:
| Deleted | What it is |
|---|---|
| Your account record | Email address, display name, avatar |
| Every sign-in session | You are signed out everywhere, including the browser extensions |
| Connected sign-in methods | For example the Google sign-in linked to the account |
| API keys | Any key issued to the account |
| Web page credits | The balance and the full transaction log behind it |
| Web subscription records | Our copy of the subscription and its state |
| Our copy of your payment records | Our rows — not the payment provider's own records, see below |
| Files you uploaded to the account | Deleted with the account |
What it does not touch: the page balance that belongs to a phone install is keyed to that install's random identifier, not to you, so deleting the web account does not by itself erase it. Uninstall the app to end it, or ask us by email.
4. What we cannot delete for you
- Store records. Apple, Google and Stripe each keep their own record of a transaction under their own privacy policies and their own legal retention duties. We cannot delete those. Use Apple's data and privacy tools, Google's My Activity, or write to the provider directly.
- Live subscriptions. A subscription billed by Apple or Google keeps billing until you cancel it in that store. Deleting the Sumi account does not cancel it. Cancel in Play Store → Payments and subscriptions → Subscriptions, or in iOS Settings → your name → Subscriptions.
5. What we keep after a deletion, and why
Three narrow things survive a deletion, none of which carries your name, your email address, your manga, or anything you read:
- Charge and grant records — amount, timestamp and the idempotency key that proves a purchase was granted exactly once. They are what a refund or a chargeback is reconciled against. They hold no image, no title, and no reading history.
- An audit line for account link and unlink operations, kept to investigate fraud against the page ledger.
- Anonymous counters — per-install request counts that exist to stop a runaway bill. They carry no identity and no request content.
We never keep the manga pages themselves. A page sent for translation is discarded as soon as the translation is returned; only a short-lived per-page idempotency key remains, so re-translating the same page does not charge you twice.
6. On the device
- Android — uninstalling the app removes everything it stored: imported chapters, bookmarks, recent sites, preferences and the install identifier. To clear a single series without uninstalling, use Remove from library.
- iPhone / iPad — uninstalling does the same. To clear the library in place, use Settings → Delete all chapters.
- Chrome / Firefox extension — Sign out in the extension, or uninstall it, to clear its local data.
7. How long it takes
Self-service deletion in Settings → Security is immediate. An emailed request is answered by a person, usually within one business day, and acted on within 30 days of us confirming that the request is yours. We will tell you when it is done.