Mindful Mood Check-in, Box Breathing & Reflection Journal
A private sanctuary for mental tranquility. Practice guided box breathing with visual pacers, log daily moods, and reflect in a 100% confidential journal.
Capabilities
Designed for Reliability & Autonomy
Every feature runs locally on your Android device without requiring internet access or account credentials.
5-Tier Mood Check-in
Quickly register emotional state (Radiant, Calm, Neutral, Fatigued, Anxious) paired with expressive contextual tags.
Guided Box Breathing Pacer
Soothe your autonomic nervous system with a fluid 4-4-4-4 visual breathing pacer (Inhale, Hold, Exhale, Hold).
Confidential Reflection Journal
Write unfiltered reflections in a private journal stored strictly on your device. Never mined for AI models or cloud analytics.
Zen Insights & Wisdom Prompts
Explore daily mindfulness prompts, reflection questions, and streak counters to sustain your calm habit.
Zero Permissions.
Zero Compromises.
Most modern mobile apps request intrusive permissions: Internet access, fine location, contacts, and camera access. Zentrail requests zero permissions.
No <uses-permission> Tags
The Android Manifest declares no permissions. The OS cannot grant network or device access even if an exploit were attempted.
Device Sandbox Isolation
All databases and configurations are held strictly inside Android's protected app sandbox directory.
Permanent Purge on Uninstall
Uninstalling the app instantly wipes 100% of data. No remnants remain on any remote cloud server.
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="me.mindfulness.zentrail">
<!-- ZERO <uses-permission> TAGS DECLARED -->
<!-- ZERO NETWORK ACCESS -->
<!-- ZERO CAMERA OR STORAGE ACCESS -->
<application
android:label="Zentrail"
android:icon="@mipmap/ic_launcher">
<activity
android:name=".MainActivity"
android:exported="true">
</activity>
</application>
</manifest>Knowledge Base
Frequently Asked Questions
Does Zentrail require an internet connection?▼
No. Zentrail operates 100% offline. It has no internet permission declared in its manifest, meaning it physically cannot make network requests or reach external servers.
Where is my data stored?▼
All your data, logs, and configurations are saved strictly in your device's private application sandbox. It never touches external cloud storage or telemetry servers.
Are there any subscriptions or hidden paywalls?▼
No. There are zero subscription fees, zero advertising SDKs, and zero locked screens. All features are immediately available upon launching the application.
How can I back up or transfer my data?▼
Because the application has zero network access, backups can be exported locally through the app's built-in export features or managed via standard Android OS device backups.
What happens when I uninstall the app?▼
When you uninstall Zentrail, the Android operating system completely purges the application's sandbox directory, destroying all local records immediately.
Ready to Experience Private, Barrier-Free Software?
Install Zentrail directly onto your Android device. Instant setup, zero logins, and complete peace of mind.