MeterWorks Vibrometer vs VibraScope

Your iPhone is a surprisingly capable vibration meter — when the app is honest about it. MeterWorks Vibrometer measures, records, and hands you your raw data: no subscription, no ads, no account, no tracking. MEASURE • Live readout with a big RMS value and a smooth real-time graph • All three axes plus magnitude, 100 Hz sampling, m/s² or g • Zero adjustment to cancel sensor offset before you measure • Selectable time window (10/30/60 s) and coupling tips for clean measurements RECORD & ANALYZE • Recordings with key metrics: RMS, peak, peak-to-peak, crest factor • Zoom, pan, and cursor in the recording graph — stats recalculated for the visible range • Pro: FFT spectrum with a peak list (dominant frequencies, rpm hint) YOUR DATA IS YOURS • Free: PNG export of any graph • Pro: clean CSV export of the full raw time series — spreadsheet-ready (comma or semicolon style), shared in seconds via Mail, Files, or AirDrop • Pro: multi-page PDF report with a statistics matrix across all axes, every graph, and the spectra — plus device info and a methodology footer FREE VS. PRO — NO SURPRISES The free version is a real instrument, not a teaser: live measurement, three recordings of 10 seconds each, full metrics, PNG export. The Pro unlock is a single one-time purchase — no subscription, ever. It removes the limits: unlimited recordings of any length, CSV raw-data export, FFT analysis, and the full PDF report. Buy it once, keep it forever, including future Pro features. WHAT THIS APP CANNOT DO — HONESTLY iPhone sensors measure reliably from roughly 0.1 to 50 Hz. That covers building and traffic vibration, washing machines, pumps, fans, and 3D printers. Bearing or gearbox diagnostics and certified measurements are beyond any smartphone — apps promising that are bluffing. The in-app page "Limits of this measurement" explains exactly what works, what doesn't, and why. TYPICAL USES Document construction vibration at your home · balance a washing machine · compare pumps and fans before and after maintenance · find 3D printer resonances · monitor sensitive cargo in transit NO SUBSCRIPTION. NO ADS. NO TRACKERS. All measurement data stays on your device. Nothing is uploaded, and nothing is locked into a proprietary format — the CSV you export is yours to keep, graph, and archive. Not a physics toolbox, not a sensor grab bag: one instrument, one job, done right. MeterWorks is a family of honest measurement apps: Sound Meter for your noise log, Teslameter for magnetic fields — just as honest, just as subscription-free.

VibraScope turns your phone into a vibration meter and seismograph — measure shaking, engines, appliances and floors with the motion sensor already in your pocket. It looks and feels like a classic paper chart recorder: a live analog needle gauge, three seismograph-style ink traces (X/Y/Z), and readouts stamped like an instrument plate. Warm paper theme by day, amber night-instrument theme in the dark. MEASURE WITHOUT INTERRUPTIONS • No full-screen ads on the measuring screen — your reading never gets wiped mid-measurement • Remove ads with a single one-time purchase, forever WHAT YOU GET • Live analog needle gauge with color-coded intensity zones • 3-axis seismograph traces or a single magnitude trace — your choice • RMS, peak and session-max acceleration in m/s² or g • Estimated shaking intensity (MMI scale, I–XII) • Dominant vibration frequency in Hz • Zero calibration and hold • Save measurements with title and notes, review them anytime • Export charts as images (high-resolution available) or data as CSV • Works on both phones and tablets • 8 languages Everything is measured and stored on your device — no account, no sign-up, and the motion sensor needs no permission at all. Great for checking washing machines and engines, monitoring workshop tools, testing floors and shelves, classroom physics, or simply seeing every little tremor around you drawn in ink. Note: readings are estimates from consumer phone sensors and do not replace calibrated instruments or official seismic monitoring.