added privacy policy

PRIVACY_POLICY.md

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+## Privacy Policy
+
+The developer built the Key Mapper app as a free and Open Source app. This SERVICE is provided by the developer at no cost and is intended for use as is.
+
+This page is used to inform visitors regarding my policies with the collection, use, and disclosure of Personal Information if anyone decided to use my Service.
+
+If you choose to use my Service, then you agree to the collection and use of information in relation to this policy. The Personal Information that I collect is used for providing and improving the Service. I will not use or share your information with anyone except as described in this Privacy Policy. You can enable or disable all data collection from within the app settings.
+
+**Information Collection and Use**
+
+While using our Service, Key Mapper will temporarily record the buttons you are pressing. This information is erased once you have stopped pressing the buttons in question. This information will be temporarily stored on your device and is not collected by me in any way.
+
+The app does use third party services that may collect information used to identify you.
+l
+The type of information collected through the Google Analytics for Firebase default implementation includes:
+
+- Number of users and sessions
+- Session duration
+- Operating systems
+- Device models
+- Geography
+- First launches
+- App opens
+- App updates
+
+Link to privacy policy and information of third party service providers used by the app
+
+*   [Privacy Policy](https://firebase.google.com/policies/analytics), [Information](https://firebase.google.com/support/privacy/)
+
+**Log Data**
+
+I want to inform you that whenever you use my Service, in a case of an error in the app I collect data and information (through third party products) on your phone called Log Data. This Log Data may include information such as your device Internet Protocol (“IP”) address, device name, operating system version, the configuration of the app when utilizing my Service, the time and date of your use of the Service, and other statistics.
+
+**Security**
+
+I value your trust in providing us your Personal Information, thus we are striving to use commercially acceptable means of protecting it. But remember that no method of transmission over the internet, or method of electronic storage is 100% secure and reliable, and I cannot guarantee its absolute security.
+
+**Links to Other Sites**
+
+This Service may contain links to other sites. If you click on a third-party link, you will be directed to that site. Note that these external sites are not operated by me. Therefore, I strongly advise you to review the Privacy Policy of these websites. I have no control over and assume no responsibility for the content, privacy policies, or practices of any third-party sites or services.
+
+**Changes to This Privacy Policy**
+
+I may update our Privacy Policy from time to time. Thus, you are advised to review this page periodically for any changes. I will notify you of any changes by posting the new Privacy Policy on this page. These changes are effective immediately after they are posted on this page.
+
+**Contact Us**
+
+If you have any questions or suggestions about my Privacy Policy, do not hesitate to contact me.