This Privacy Policy applies to all mobile applications published by NaOHStudio (“we”, “us”, “our”) on Google Play, including free and paid apps (the “Apps”). It explains what information is collected when you use the Apps, how it is used, and the choices you have.
NaOHStudio is the developer of the Apps and is responsible for the processing of data described in this policy. You can reach us at pdhoan96@gmail.com.
1. Summary
- We do not require you to create an account, and we do not store your personal data on our own servers.
- Paid Apps do not contain advertising.
- Our Apps use Google Firebase Analytics and Firebase Crashlytics to understand app usage and fix crashes.
- Free Apps may display ads through Google AdMob.
- We do not sell your personal data.
2. Information We Collect
2.1 Information you provide
We do not collect personal information such as your name, email address, or phone number through the Apps. If you contact us by email, we receive your email address and the content of your message, and use them only to respond to you.
2.2 Information collected automatically
Through the third-party services listed in Section 4, the following data may be collected automatically:
- App usage data: screens viewed, features used, session length, app version, and similar interaction events (Firebase Analytics).
- Device information: device model, operating system version, language, and approximate region derived from the IP address.
- Identifiers: app instance IDs / Firebase installation IDs; in free Apps with ads, the Android Advertising ID.
- Crash and diagnostic data: crash logs, stack traces, and device state at the time of a crash (Firebase Crashlytics).
This data is not used to identify you personally.
2.3 Purchases
Paid Apps and any in-app purchases are processed entirely by Google Play. We do not receive or store your payment card details or billing information. Google’s handling of payment data is described in the Google Privacy Policy.
2.4 Device permissions
Some Apps may request device permissions only when needed for a specific feature (for example, access to storage to save a file). Each permission is used solely for the feature it supports, and data accessed through permissions stays on your device unless stated otherwise in the App. You can revoke permissions at any time in your device settings.
3. How We Use Information
- To operate, maintain, and improve the Apps.
- To diagnose crashes and fix bugs.
- To understand how the Apps are used in aggregate.
- In free Apps only: to display advertising.
- To respond to your support requests.
4. Third-Party Services
The Apps use the following third-party services, which collect data under their own privacy policies:
- Google Firebase Analytics – usage analytics (all Apps)
- Google Firebase Crashlytics – crash reporting (all Apps)
- Google AdMob – advertising (free Apps only; not used in paid Apps)
- Google Play Billing – payment processing (paid Apps and in-app purchases)
5. Data Sharing
We do not sell, rent, or trade your personal data. Data is shared only with the service providers listed above for the purposes described, or when required by law.
6. Data Retention and Deletion
- Firebase Analytics data is retained for up to 2 months and then automatically deleted.
- Firebase Crashlytics crash data is retained for up to 90 days.
- Support emails are kept only as long as needed to resolve your request.
Because we do not store personal data on our servers, uninstalling an App stops all further data collection. You may also request deletion of any data associated with your app installation by emailing pdhoan96@gmail.com with the App name. We will process your request within 30 days.
7. Data Security
Data collected by the third-party services above is transmitted using encryption (HTTPS/TLS). We take reasonable measures to protect information from unauthorized access, loss, or misuse.
8. Your Rights and Choices
Depending on where you live (for example, under the GDPR in the EU/UK or the CCPA in California), you may have the right to access, correct, delete, or restrict the processing of your data, and to object to processing. To exercise these rights, contact us by email.
In free Apps, you can reset your Advertising ID or opt out of personalized ads in your Android settings (Settings › Google › Ads / Privacy › Ads).
9. Children’s Privacy
Our Apps are not directed to children under the age of 13, and we do not knowingly collect personal information from children. If you believe a child has provided us with personal information, please contact us and we will delete it.
10. Third-Party Content
Some Apps (for example, theme or wallpaper apps) may download content such as images or themes from the internet. Downloading this content does not require you to provide any personal information. Terms regarding the use and ownership of such content are described in our Terms of Use.
11. Changes to This Policy
We may update this Privacy Policy from time to time. Changes will be posted on this page with a new effective date.