MeterWorks Teslameter vs VibraLens

Your iPhone has a real magnetic field sensor — this app turns it into an honest instrument. No ghost detector, no ads covering the reading, no subscription: MeterWorks Teslameter measures, records, and documents magnetic fields. MEASURE • Live field strength |B| with a big readout and a smooth real-time graph • All three axes plus magnitude, 100 Hz sampling, µT or mG • Zero baseline: blank out the ambient field and hunt magnets and metal in delta mode • Compass calibration state shown honestly RECORD & ANALYZE • Recordings with key metrics: RMS, peak, peak-to-peak, crest factor • Zoom, pan, and cursor in the recording graph — stats for the visible range • Pro: FFT spectrum with peak list and AC field indicator (50 Hz mains hum, beta) YOUR DATA IS YOURS • Free: PNG export of all four channels • Pro: clean CSV export of the full raw series — spreadsheet-ready • Pro: multi-page PDF report with statistics matrix, time series, spectra, and measurement documentation FREE VS. PRO — NO SURPRISES Free is a real instrument: unlimited live measurement, three recordings of 10 seconds each, full metrics, PNG export. Pro is a single one-time purchase: unlimited recordings, FFT analysis, CSV and PDF export — all future Pro features included. No subscription, ever. WHAT THIS APP CANNOT DO — HONESTLY The magnetometer measures static and low-frequency magnetic fields up to 50 Hz (the Nyquist limit of 100 Hz sampling). Radio frequency — cellular, Wi-Fi, Bluetooth — is beyond ANY smartphone magnetometer; apps promising "radiation readings" are bluffing. This is not a wire detector either: always use a proper scanner before drilling. The in-app page "Limits of this measurement" explains exactly what works. TYPICAL USES Locate magnets and magnetic metal · compare speaker and magnet field strength · check low-frequency EMF indicatively · show Earth's field (physics class) NO SUBSCRIPTION. NO ADS. NO TRACKERS. All measurement data stays on your device. EMF put honestly in context: facts, not fear. MeterWorks is a family of honest measurement apps: Vibrometer for vibration, Sound Meter for your noise log — just as honest, just as subscription-free.

Point your iPhone at a running machine and see its vibration: a live color overlay shows WHERE it shakes, and a readout shows how fast, in Hz. No sensors to mount, no contact, no cables. VibraLens measures through the camera, from a distance. WHAT YOU SEE VibraLens processes high-frame-rate video (up to 240 fps) in real time and paints a frequency-colored overlay directly on the camera image. Anything moving periodically lights up in the color of its frequency, so you can see at a glance which part of a machine, mount, panel, or pipe is vibrating — and at what rate. A live readout tracks the dominant frequency in Hz, and the RPM equivalent is one mental step away: 60 Hz = 3,600 RPM. WHO USES IT • HVAC techs — spot a wobbling blower wheel or an out-of-balance condenser fan before pulling a panel, then confirm the fix afterward. • Maintenance techs and engineers — find WHERE the vibration lives on a motor, pump, or gearbox: the frame, the coupling side, a mounting foot, a loose guard. • Home and property inspectors — document a shaking furnace blower or a buzzing duct with an evidence video, legend and frequency readout burned in. • Machine shops — sanity-check a spindle or a belt-driven speed by its frequency signature. • Serious DIY — figure out why the washing machine walks across the floor, which ceiling fan blade wobbles, whether the pool pump runs rough, or what speed the bench grinder really turns. FEATURES • Live frequency-colored overlay: see where periodic motion is happening • Dominant-frequency readout in Hz — reliable band roughly 8–115 Hz (about 480–6,900 RPM equivalent) • Records evidence video with the color legend and readout burned in, ready to share with a client or a work order • LO/HI band filters and a sensitivity threshold to isolate the motion you care about • Mains flicker rejection for 50/60 Hz lighting • Built-in torch control for dim mechanical rooms • Works at a distance — you never touch or attach anything to running machinery HONEST LIMITS — READ BEFORE BUYING VibraLens measures frequency, not amplitude. It will not give you mm/s, mils, severity grades, or go/no-go verdicts. Its reliable band is roughly 8–115 Hz; faster vibration is beyond what a phone camera can resolve. It needs light — it cannot see in darkness. It is a screening and troubleshooting aid, not a replacement for a calibrated contact instrument or a certified inspection. And never attach your phone to machinery — the entire point of VibraLens is that you don't have to. PRIVACY 100% on-device processing. No account, no sign-up, no analytics, no tracking, no ads. Your video never leaves your iPhone unless you choose to share it. PRICE One-time purchase. No subscription, no in-app purchases, no upsells. Buy it and use it for years. Requires an iPhone with iOS 16.6 or later. Best results with the target reasonably lit and the phone held steady or braced. Questions or ideas? support@vibralens.example — or see vibralens.example for demo videos, including a live sweep from 8 to 99 Hz on an oscillating tool.