StudentLite vs Sound Meter

Scientific Calculator for iPad, iPhone and iTouch all in the same App. The BEST Scientific Calculator — Just try it for free! Easy to access the scientific functions by swiping between exponents, logs and sinus functions so all buttons are large and uncluttereds, this allows you to work faster and more reliable (no rotation or "2nd" function keys needed). All the functions are visible on the iPad, but more are revealed by rotating to landscape. Balloon help for easy functionality. Features: - Correct with a backspace key if you enter a wrong digit without having to redo. - Parantheses and correct calculation priority. - Copy and Paste numbers to other Apps, by tapping on the display. - Change number display to Fixed, Scientific, etc., by tapping on the display. - Customize you background and fixed digits. - An audible sound confirms if you have pressed a button, which can be easily disabled by touching the speaker. - Previous calculation is repeated when the equal sign is pressed. - Memory is saved between uses. - Degrees and Radians can be switched by pressing the symbol on the screen or a button. - A visible and audible error when trying to divide by zero or take the square root of a negative number. - Numbers are shown in local format, depending on your Region Formats, i.e. comma used in Europe. - Calculations are done in extended accuracy so that the square root of 2 repeated a few times, followed by a square will result in 2, not 1.999999999999983 (try this on other calculators!). NOTE: - This FREE App may display ads on the iPad, but has full functionality.

Turn your iPhone into a smart sound measurement tool: measure noise, find frequencies, compare changes and create reports. Most sound meters just show a number. Sound Meter tells you what it means and what to do next. MEASURE • Live dB with A, C and Z weighting and Fast, Slow or Impulse response • Average (Leq), minimum, maximum and peak, with a 60-second graph • Plain answers: "43 dBA · Quiet, like a library" • Guided modes for Noise, Machine, Speaker and Room set everything up for you FIND • Spectrum analyzer with the dominant frequency and likely sources ("126 Hz · Low hum — check fans, compressors, fridges") • Tap to pick any frequency, pinch to zoom, freeze and peak hold • Find mode: lock a frequency, walk around and follow "Getting louder" to the source COMPARE • Save sessions and measure Before / After from the same spot • See exactly what changed: "Noise reduced −8.5 dBA average, largest change at 125 Hz" • Great for HVAC work, soundproofing, speakers, fans and machines REPORT • PDF measurement report with levels, graph, spectrum, events, device, microphone and calibration • CSV data and PNG image export MONITOR • Set a threshold and get notified when noise stays above it • Event log with times and maximum levels, even while the phone is locked NUMBERS YOU CAN TRUST • Calibration wizard: match a reference meter or acoustic calibrator in a minute • Measurement Quality shows why a reading is Good, Fair or Poor — clipping, noise floor, microphone route, calibration • USB measurement microphones and wired headsets supported ALSO • RTA in 1/1 and 1/3 octave bands • Tone generator: sine, pink noise, white noise and sweeps PRIVATE BY DESIGN Audio is analyzed live on your iPhone. It is never recorded, stored or sent anywhere. No ads, no account, no tracking. PRO — ONE-TIME PURCHASE Find mode, Before / After, noise monitor, PDF and CSV export, 1/3-octave RTA, unlimited sessions, calibration for every microphone and the full generator. Pay once, no subscription. Sound Meter is a measurement reference, not a certified sound level meter (IEC 61672). For legal or occupational compliance, use a certified instrument. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://bmit-mob.web.app/sound-meter/privacy-policy.html