Privacy Policy

Ascendio (iPhone and iPad app) Last updated: October 31, 2026

This policy explains how Ascendio (“the app”) handles your information. The app is developed independently by Takuro Koyanagi (“the developer”). If this English version differs from the Japanese version, the Japanese version prevails.

Your account

When you first open the app, it creates an account with no name (a random ID) using Google’s Firebase Authentication. You don’t need to register your name or email address.

Data you record

The following data is stored in Google’s Cloud Firestore (Firebase), tied to your account, so that you can move it to another device and don’t lose it.

This data is never used for advertising or sold to third parties.

Linking your Apple ID (optional)

If you link your Apple ID in the app’s Settings, you can move your data to another device. This uses an ID that Apple provides for each app. Starting with version 1.5.0, the app does not ask Apple for your email address or name.

Up to version 1.4.0, the app asked Apple for your email address and stored it in Firebase Authentication and in your account data (Cloud Firestore). If you chose Hide My Email, this is a forwarding address provided by Apple. It is removed from your account data when you open version 1.5.0 or later. It may remain in Firebase Authentication. It is removed when you delete your account.

Versions up to 1.3.2 also requested your name, so if you linked during that time and shared your name, it may be stored in Firebase Authentication. It is removed when you delete your account.

Where data is stored

When the app communicates, your IP address reaches Google as a normal part of how the internet works.

Information kept only on your device

Purchasing the Premium Plan

Purchases of the Premium Plan are processed by Apple’s App Store. The developer never receives your card number or other payment information. Whether you have purchased is checked on your device using Apple’s system and is not sent to the developer’s servers.

Third-party services

Ads and analytics

The app shows no ads. It includes no analytics, and it does not track you across other apps or websites.

Deleting your data

In the app, Settings → Delete Account deletes all records stored in Cloud Firestore and your account. If you linked your Apple ID, the link is revoked as well. If you can’t delete your data from the app, please contact the address below.

Emails you send us

What you write in an email to us is used only to reply and to look into problems. When you open an email from Settings → Contact Us in the app (version 1.3.3 and later), the app version, iOS version, device model, and app language are added below the message. You can delete them before sending.

Changes

If this policy changes, this page will be updated.

Contact

ascendio@takurokoyanagi.com

A reply to every inquiry is not guaranteed.