Effective: October 27, 2026 (originally September 3, 2026)
WhoPays (Korean name 누가얼마, "the app") handles only the information needed to log trip expenses and calculate who owes whom. It does not send that information to the developer's servers or collect it. A third-party ad SDK does process some device information to show ads (section 4), and feedback emails you choose to send include the information described in section 6.
The app itself collects no personal data. It has no sign-up, no login, and no server storage. Trip names, the names of the people you traveled with, and expenses are stored only on your device (the app's or browser's local storage), and the developer cannot access them. The ad SDK bundled with the app (see section 4) may separately process device information such as an advertising identifier in order to show ads. If you open the web version (https://whopays-app.web.app), the hosting service (Google Firebase Hosting) may keep ordinary access logs such as IP addresses.
"Share trip as a link" compresses the trip name, participant names, and expenses into the link itself. That data lives in the hash part of the link (after #), so it is never sent to or logged by the app's web server. Anyone you send the link to can view its contents. If you send the link through another service (a messenger, SMS, or email), that service may transmit or store the full address including the hash, so choose how you share carefully. A link is only created when you choose to share.
Trips, members, expenses, and whether you purchased "Remove ads" are stored in your device's local storage. Deleting a trip in the app removes its data. Clearing site data or uninstalling the app removes everything. Backup files you create with "Save backup" are saved only where you choose and are not sent to the developer. If you have your operating system's device backup turned on (Android auto backup, iCloud backup on iOS, etc.), app data may be included in the backup the operating system provides; that is a feature of the OS provider, not the developer.
The app uses Google AdMob to show a banner ad at the bottom of the screen. AdMob may process an advertising identifier (IDFA on iOS, advertising ID on Android), device information, approximate location, and app usage information to serve and measure ads. This information is processed by Google under its own privacy policy, not by this app — see Google's policy on how data is used in partner apps and sites for details. On iOS 14.5+, the app may request tracking authorization for personalized ads; you can decline this and still use the app normally (you may see non-personalized ads instead). In the European Economic Area, the UK, and Switzerland, Google's consent tool (UMP) asks for your ad-related consent first, and you can change it later from "Ad privacy settings" on the Home screen. The app uses no analytics tools or tracking scripts other than AdMob.
"Remove ads" is a one-time in-app purchase processed by the Apple App Store or Google Play. The app and the developer do not receive your payment details; the app only stores on your device whether the purchase was made.
"Send feedback" on the Home screen opens your mail app with the platform (iOS/Android) and app version filled in automatically. An email is sent only when you send it yourself, and the developer then receives your email address and what you wrote. We use this only to respond to your message.
The app is not directed at children and does not check or distinguish users' ages. Information processed by the ad SDK is subject to Google's policies as described in section 4.
Questions about this policy:
Email: contact@shortappstudio.com
If this policy changes, the update and its new effective date will be posted on this page.