Reclaim complete ownership of your personal data. Crystal Digital Labs engineers zero-permission Android tools running strictly on silicon-level local execution.
Every app in our studio is designed around single-purpose minimalist utility, high efficiency, and complete network isolation.
v2.4 • System Utility
Industrial Minimalist Launcher engineered to strip away digital friction, eliminate algorithmic loops, and reclaim human attention.
White Noise & Audio Architecture
Clinical-grade sleep platform featuring mathematically calibrated brown noise, procedural soundscapes, and snore recording capabilities.
Encrypted Journal
Secure silicon-level journal protected by biometric enclave hardware encryption. Internet is used strictly for cryptographic time beacon verification to prevent phone clock tampering on locked Time Capsules—all core journaling and storage features remain 100% offline.
Chat DNA & Analytics Engine
Zero-permission analytics engine that parses exported message logs strictly on-device without reading real-time network packets.
File Encryption: Secure Vault
Industrial-strength military file encryption tool utilizing ChaCha20-Poly1305 protocols for absolute payload defense.
Docs to Json Engine
Developer's offline data intelligence tool converting raw unorganized text, CSVs, and PDFs into clean schema JSON.
{ "privacy": "absolute", "local_parser": true }
Routine & Habit Planner
Offline daily habit tracker and routine system designed to build long-term discipline without cloud telemetry or data leaks.
Financial Sovereignty & Tax Hub
Financial sovereignty and tax hub providing offline double-entry ledger bookkeeping, receipt storage, and zero bank syncing risks.
AI Calorie Tracker & Smart Nutrition Coach
Private nutrition intelligence engine with instant neural vision meal scanning and 24/7 AI diet coaching. Internet is used strictly for food scanning and coach guidance—zero metabolic data mining or ad profiling.
Direct telemetry-free channel to our engineering lab. Tell us what we should build or improve next.
Thank you for supporting silicon-level user sovereignty. You can also contact us directly at crystal.dev@zohomail.in.
We believe modern mobile software has become a trojan horse for data harvesting. Our engineering core is bound by 3 non-negotiable architectural mandates.
7 suite apps have a hard kernel-level internet block (android.permission.INTERNET omitted entirely). ZenVault and Crystal operate with strict purpose-bound network isolation: ZenVault verifies drand cryptographic time beacons, while Crystal uses network compute exclusively for food computer vision and AI Diet Coach guidance with zero health-data profiling or monetization.
All algorithmic computations, SQLite queries, index generation, and media processing occur entirely within your local system CPU and GPU memory space. Zero remote telemetry.
No vendor lock-in. You retain 100% ownership of your databases. Export full unencrypted backups anytime in standard human-readable JSON, CSV, or raw SQLite formats.
Inspect decompiled permission manifests and network scope for all production builds.