Stock Average Calculator Privacy Policy
Effective date: 11 October 2026 · Publisher: Owlmakers · 한국어
Owlmakers ("the developer") operates Stock Average Calculator (평단 계산기) ("the app"). The app calculates stock, ETF, and crypto average prices, staged split buys, and target share quantities. It is an on-device calculator app with no accounts and no cloud upload.
Summary
· Your entered quantities, buy prices, target prices, currency settings, and stock memos never leave your device — all calculations and history storage run locally on your phone.
· There are no accounts or sign-ups; the developer holds no personal information about you.
· Local JSON file backup and restore only run when you explicitly export or import a file via your device's file picker or share sheet.
· Ads (Google AdMob) use your Advertising ID, and anonymous usage analytics (Firebase Analytics) never include your calculation numbers or memos.
1. Calculation Inputs and Saved History — they never leave your device
The app requires no sensitive device permissions and performs all exact rational arithmetic locally on your device.
- Your entered quantities, buy prices, target prices, currency settings, and ticker memos are never sent to the developer's servers or to any third party.
- All average price calculations, split-buy comparisons, target share reverse calculations, and history logs run 100% on your device (on-device).
- JSON file backup and restore operate only when you explicitly initiate an export or import through your device's system file dialog.
2. Data stored on your device
The following stays on your device only and is never transmitted externally.
| Item | Contents |
|---|
| Draft inputs & saved history | Entered quantities, prices, currency selection, auto/manual saved records, and ticker memos |
| App settings | Theme (System / Light / Dark), display language, and onboarding completion state |
Clearing app storage or uninstalling the app deletes this data.
3. Advertising — Google AdMob
The app displays Google AdMob ads to remain free.
- AdMob may collect an advertising ID (AAID) and device information to serve ads.
- This is governed by Google's policies; the developer does not separately collect or retain it.
- The developer never shares your calculation inputs or memos for advertising purposes.
- Google advertising data: https://policies.google.com/technologies/ads
- Ad personalisation can be changed in device Settings → Google → Ads.
- Users in the EEA and the UK are shown a consent (UMP) dialog on first launch.
4. Usage analytics (Google Analytics for Firebase)
This app uses Google Analytics for Firebase to collect anonymous usage statistics so the app can be improved.
- What is collected — anonymous screen/usage events and a randomly assigned app instance ID per installation.
- What is not collected — no personally identifying information (name, email, phone number) and none of your entered prices, quantities, or memos.
- Who processes it — Google performs the collection and processing; the developer only views aggregated statistics in which individuals are not identifiable. Google's privacy policy: https://policies.google.com/privacy
5. Children under 14
The app is not directed at children under 14 and does not knowingly collect their personal data.
6. Your rights
The app has no accounts and no sign-in, so the developer holds no personal data about you. You can delete on-device data at any time using "Clear all history" inside the app, clearing app storage, or uninstalling the app.
7. Contact & Changes
- Email: support@owlmakers.com
- Developer: Owlmakers
- Any change to this policy will be published on this page.