Software built for local sovereignty.

Free, open-source tools by Ashish Ranjan. Hardened mobile cryptography and developer tooling with zero tracking, no accounts, and your data staying on your device.

2 shipped releases

•100% free•No monetization•Local-first

Inspect btw vault envboot Docs ↗GitHub ↗

Cryptographic Mobile Vault

v1.3.4 • FREE • ANDROID

btw vault

v1.3.4Zero Telemetry

Zero-knowledge, offline-first personal cryptographic vault.

View Architecture ➔

Built from the metal up for users who decline to trust remote third-party credential vaults. Credentials, payment cards, notes, and dynamic schemas are encrypted directly in an on-device SQLCipher database using native C++ JSI bindings. Master keys are derived in-memory via Argon2id and never persisted unencrypted.

Hardened Architecture Specifications

STORAGE CIPHER

SQLCipher AES-256-CBC

4096-byte page HMAC verification

KEY STRETCHING

Argon2id Memory-Hard

4MB RAM cost • 2 iterations • 256-bit salt

CLOUD CONTINUITY

Client-Side E2EE Drive Sync

Zero-locking SQLite WAL snapshots

TELEMETRY & AD TRACKERS

0 (Strictly Offline-First)

No analytical SDKs • No user tracking

Developer Tooling • Open Source

v0.1.7 • MIT LICENSE

envboot

v0.1.70 Runtime Deps

Zero-runtime-dependency environment contract and validation tool.

Documentation ➔GitHub ↗

Prevents applications from booting with missing, malformed, or drifted environment variables. Enforces typed contracts at startup across Node.js, Bun, Deno, and modern browsers with zero runtime overhead and automated CI/CD schema validation.

CLI INITIALIZER:npx envboot@latest init

Node.js • Bun • Deno • TypeScript • Browser