ZeroPing Almanac

ZeroPing Almanac is a privacy-first reference and calculator suite for developers, sysadmins, and network engineers. All 16 tools run entirely on-device. No internet connection. No account. No ads. No analytics. This is not a marketing claim. The app holds no INTERNET permission in its manifest at all - not restricted, simply absent. It has no way to phone home. NETWORK Subnet Calculator - IPv4, IPv6, VLSM, and containment checks computed locally Port Lookup - curated TCP/UDP service reference MAC Vendor Lookup - full offline IEEE OUI database bundled in the app Router Credentials - default factory login reference for common devices SECURITY Security Vault - MD5/SHA hashing, password generator with entropy meter, Diceware passphrases, and TOTP with hardware-backed at-rest encryption and password-encrypted backup JWT Decoder - inspect headers and payloads without sending tokens to a third-party service Random Bytes - crypto-grade random output in hex, base64, or decimal ENCODING & CODES QR Generator - Wi-Fi, vCard, URL, and plain text payloads, generated on-device Encoders - Base64, URL/percent, and HTML entity encoding and decoding UUID Generator - v4 random and v7 time-ordered Regex Tester - live pattern matching with match highlighting Colour Converter - HEX, RGB, HSL, and OKLCH TIME & DATA Unix Timestamp - epoch-to-human and human-to-epoch, both directions Cron Explainer - 5-field and 6-field expressions, named months and weekdays, ranges, lists, and steps REFERENCE & UTILITIES IT Data Converter - storage, bandwidth, time, and number base conversion Cheat Sheets - 12 offline quick-reference cards: Bash, Docker, Git, JavaScript, Linux, Markdown, Python, Regex, SSH, SQL, tmux, Vim MORE FEATURES - Searchable history across 15 tools (TOTP and raw hashes excluded for security) - Customisable home screen - pin and reorder your most-used tools - Home screen widgets for Subnet Calculator and TOTP - Quick Settings tile for instant access from any screen - Encrypted backup and restore (PBKDF2 + AES-GCM) - Automation support via ContentProvider (Tasker, ADB, scripts) - Material 3 design, supports dark and light theme No data leaves your device. Ever. Built by Barricaded Labs.