Please send questions and support requests to the address below.

Please include the app name, device model, OS version, the issue you are seeing, and steps to reproduce when possible.

We can help with the following topics.

How to use the app

Questions about recording, categories, notes, currency settings, closing day, and the dashboard are supported.

Bug reports

We accept reports about saving issues, layout problems, data display, import / export, ads, and premium purchase flow inside the app.

Purchases

We can answer questions about how premium is presented inside the app. For billing, refunds, and official purchase history handling, please use support for the store you used (App Store or Google Play).

Please review the privacy policy for user-related information. Current public availability is shown on the app page.

We aim to review messages within 3 business days. Some cases may require additional time for confirmation.

App: Ultra Simple Expense Log (超簡単家計簿)

Provider: Doui Lab

Supported languages: Japanese, English, Chinese, Korean, Spanish, Portuguese

For App Store Connect, the app page URL is https://www.doui-lab.com/apps/kakeibo/ and the support URL is https://www.doui-lab.com/apps/kakeibo/support/. The App Store URL is https://apps.apple.com/us/app/ultra-simple-expense-log/id6762006872, and the current release status is live.

This app is one of Doui Lab's products. See the top page for the broader brand direction and public information.

If you signed in to the Android app with an existing Doui Lab account, email support@doui-lab.com from its registered email address with the subject “Ultra Simple Expense Log account deletion”. Do not send your password. After verifying ownership, we can delete the authentication account and associated premium management information. Deletion may also affect sign-in to other Doui Lab apps using that same account.

You can also keep your account and request deletion of specific collected data associated with this app, such as premium management information. Use the same contact address and specify the data to delete. We will explain any impact on entitlement checks or purchase restoration before deletion.

This request covers account-associated information. Manage device-local expenses and exported files yourself. Deleting an account does not cancel a subscription; cancel it through your store. We will explain any information that must be retained for legal obligations or fraud prevention when handling your request.