Sensor Data Pro vs MainframeMonitor

Sensor Data Pro helps you capture high-quality sensor recordings from your iPhone or iPad for testing, field work, and analysis. Use it to record motion, location, microphone level, barometer, and magnetometer data in one session. Add event markers as you record, review sensor charts by type, inspect per-axis values, and export complete session files for downstream analysis. Built for reliable long sessions: - Live preview before recording - Configurable sensor selection and sample rate - Background-aware recording behavior with explicit gap annotations when iOS limits sensors - Session analytics dashboards with min/mean/max and timeline context - CSV and JSON export from persisted recordings Your recordings stay on-device by default.

Turn your iPhone into a mainframe from the golden age of computing. MAINFRAME MONITOR shows your device's live stats wrapped in a nostalgic CRT console – complete with phosphor glow, scanlines, a boot sequence and satisfying key clicks. Choose between classic GREEN or warm AMBER, each with its own matching app icon. ■ LIVE SYSTEM MONITOR • Battery, CPU, memory and free storage • Uptime, network status and device info • All in real time, right on the glowing screen ■ HOME SCREEN WIDGET • Keep your key system stats always in view • In the same retro CRT style ■ REAL MAINFRAME FEELING • Authentic boot sequence on launch • Scanlines, glow and CRT effects • Terminal-style PF function-key controls ■ HIDDEN CLASSIC GAMES • Snake, Hamurabi, Void Patrol and Bagels • Text-based retro games, just like on the old terminals ■ FAIR & PRIVATE • Completely free • No ads, no trackers, no accounts • All data stays on your device Whether as a stylish system monitor, a home screen widget or a hands-on piece of computing history – MAINFRAME MONITOR brings back the charm of the old data centers. Made with attention to detail. Be sure to check out my other apps right inside the app.