Decibel Sound Meter - Messwerk

Messwerk turns your iPhone and iPad into a measuring instrument: sound level in dB(A), spirit level, compass, barometer, GPS speedometer, stopwatch and a measurement camera — seven tools in one app. No subscription, no ads, no account. Every measurement stays on your device. EVERYTHING AT A GLANCE The home screen shows live readings right on the tool tiles, such as the tilt from the spirit level and the heading from the compass. "Recent measurements" lists your latest sound level runs with a mini chart and your stopwatch times. Tools, camera and settings sit side by side: one swipe changes the page, and the big shutter in the middle of the bar opens the camera and takes the photo right there. Tools and saved measurements zoom out of their tile. SOUND LEVEL / NOISE METER Measure noise and loudness in decibels dB(A) with A-weighting, minimum, maximum and energy-equivalent average (Leq). The live chart shows the last 60 seconds; swipe for a third-octave spectrum from 31 Hz to 16 kHz. Pause runs, save them with a name and compare them in your history. Every saved run shows its level over time with average, maximum and the 85 dB line, plus how its time splits across loudness zones — including the time above 85 dB. While a measurement is running, the level appears in the Dynamic Island and on the Lock Screen, and Messwerk can keep measuring in the background. SPIRIT LEVEL A bubble level when the phone lies flat, a tube level when it stands on an edge — the view rotates so it stays readable in any position. Haptic feedback lets you feel when you're level (within about 1° flat and 0.3° on an edge). COMPASS A clean compass rose with magnetic heading in degrees. BAROMETER Air pressure in hPa, relative altitude change with a reset to your reference point, and absolute altitude above sea level. SPEEDOMETER GPS speed on a dial with a max marker, plus a chart of your whole trip with the average and your fastest moment, your course and GPS altitude. Max, average and distance at a glance, in km/h or mph — in the background too, if you like. STOPWATCH & TIMER A drift-free stopwatch with laps and your fastest and slowest lap. Saved times show the laps as a chart. Save times with a name and set countdowns of up to 24 hours. MEASUREMENT CAMERA Take photos and videos with live filters and overlay sound level, tilt, heading, air pressure and speed — the readings are baked right into the picture. Zoom presets 0.5×/1×/3× (depending on the device), flash and torch, an optional Messwerk watermark and a history of all your captures — swipe up to open it. MESSWERK PRO — SUPPORTER BUNDLE An optional one-time purchase — no subscription. Pro unlocks: • Home Screen widgets: "Recent measurements" (small, medium, large) and "Quick Launch" with every tool including the camera • Lock Screen widgets with your latest sound level • CSV export of single sound level runs and stopwatch times, or all your data at once It also supports the independent development of Messwerk. All measuring tools, saving, history, the measurement camera and the Live Activity stay free. FOR IPHONE, IPAD AND IPHONE DUO On iPad and on an unfolded iPhone Duo, Messwerk rotates with you — large instruments in portrait and landscape. HONEST AND PRIVATE Every tool tells you how accurate it is and where its limits are — an iPhone microphone is not a calibrated measurement microphone. Messwerk works completely offline: no account, no ads, no tracking, no data collection. Developed by WinByte