1. Overview
DevCalc ("the App") is a free offline developer utilities application created by De Gifted Brain Tutors. The App provides eight developer tools and a private notepad for IT students, programmers, and tech enthusiasts.
This Privacy Policy applies to the DevCalc Android application available on the Google Play Store. By using the App, you agree to the terms described in this policy.
The short version: We did not built this app for data. We have no servers, no analytics, no ads, and no accounts. This privacy policy exists because Google Play requires one, not because we actually have anything to disclose.
2. Data Collection
DevCalc does not collect any of the following:
- ✕ Personal information (name, email, phone number, age)
- ✕ Device identifiers (IMEI, Android ID, advertising ID)
- ✕ Usage analytics or app interaction data
- ✕ Crash reports or diagnostic data
- ✕ Location data (precise or approximate)
- ✕ Contacts, photos, files, or media
- ✕ Clipboard content (the app writes to your clipboard only when you tap "copy", it never reads it)
- ✕ Keyboard input or search history
- ✕ Financial or payment information
- ✕ Health or fitness data of any kind
3. Notepad & Local Storage
The App includes a Notepad feature that allows you to create, edit, and delete notes. Notes are stored using Hive, a lightweight local database that runs entirely on your device.
- ✓ Notes are saved to your device's private app storage only
- ✓ Notes are never uploaded, synced, or transmitted anywhere
- ✓ Notes are only accessible to the DevCalc app
- ✓ Notes are permanently deleted when you remove them in-app
- ✓ All notes are erased permanently when you uninstall the app
Android Backup: The App has android:allowBackup="false" configured. This means your notes are never included in Android's automatic backup to Google servers. Your notes exist only on your physical device.
Technical storage location (Android app sandbox, inaccessible to other apps):
// Private sandbox, no other app can access this
/data/data/com.degiftedbraintutors.devtools/
// Manifest flags that protect your data
android:allowBackup="false"
android:fullBackupContent="false"
4. App Permissions
DevCalc declares zero permissions in its Android manifest. The following permissions are explicitly not declared or used:
When you install DevCalc, Android will not show you any permission request dialogs. The app simply opens and works.
5. Network & Internet Access
DevCalc has no internet access. The INTERNET permission is not declared, meaning Android physically prevents the app from making any network connections.
Additionally, the App includes a network security configuration that explicitly blocks all traffic as a second layer of protection:
<!-- network_security_config.xml - blocks ALL traffic -->
<network-security-config>
<base-config cleartextTrafficPermitted="false">
<trust-anchors/>
</base-config>
</network-security-config>
This means no data can ever leave your device through this app: not now, and not in any future update without explicit disclosure in a revised privacy policy.
6. Third-Party Services
DevCalc does not integrate any third-party services:
- ✕ Google Analytics or Firebase Analytics
- ✕ Google AdMob or any advertising network
- ✕ Firebase Crashlytics or any crash reporting service
- ✕ Facebook SDK or Meta Pixel
- ✕ Amplitude, Mixpanel, or any analytics platform
- ✕ Any third-party login or authentication service
- ✕ Any in-app purchase or billing SDK
7. Children's Privacy
DevCalc is a general-purpose tool rated Everyone (E) on the Google Play Store and is suitable for all ages.
Because the App does not collect any data from anyone, there is no special handling required for data from children. No personal information is gathered, stored, or transmitted regardless of the user's age.
8. Google Play Data Safety
The table below reflects the exact answers submitted in the Google Play Console Data Safety form:
| Question | Answer |
|---|---|
| Does your app collect or share any required user data types? | No |
| Is all user data collected encrypted in transit? | N/A — no data collected |
| Do you provide a way for users to request data deletion? | N/A — no data collected |
| Does the app require an account to use? | No |
| Does the app use the INTERNET permission? | No |
| App content rating | Everyone (E) |
| Does the app contain ads? | No |
| Does the app offer in-app purchases? | No |
9. Your Rights
Because DevCalc does not collect personal data, regulations such as GDPR, CCPA, and Nigeria's NDPR have minimal practical application. We acknowledge your rights in full:
- ✓Right to access: You can view all data the app holds. Is it your notes, visible in the Notepad screen at all times.
- ✓Right to deletion: Delete individual notes inside the app, or uninstall the app to permanently erase everything.
- ✓Right to portability: Your notes are on your device. You may copy them at any time.
- ✓Right to object: No processing of your data occurs on our end, so there is nothing to object to.
10. Changes to This Policy
We may update this Privacy Policy from time to time. Any changes will be posted on this page with a revised "Last Updated" date at the top.
Our commitment: We will never add data collection, advertising, or analytics to this app without explicitly informing users through a Play Store update note and a revised privacy policy published at this URL.
11. Contact Us
If you have any questions about this Privacy Policy or about DevCalc, please reach out to us:
De Gifted Brain Tutors
Nigeria's premier IT tutoring platform.