SmarterNoise Pro vs Altimeter AR

SmarterNoise Pro is the most advanced edition of the SmarterNoise recording sound level meters. SmarterNoise Pro edition is developed especially with more advanced measurements in mind, and includes many requested features such as a frequency spectrum display, export of measurement data, A-, C- or no weighting for sound level measurement, and full screen audio mode. SmarterNoise Pro edition does not contain any advertising, and performs accurately and fast. Features: • Sound level measurement in video mode • Sound level measurement in audio mode • Sound meter snapshot camera • Record video and audio files (paid function) • Recording timer • Sound level activated audio recording • Frequency spectrum display (paid function) • Peak frequency detection • A-, C- or no frequency weighting • Export of measurement data in CSV format • Full HD (paid function), HD and VGA video resolution • Three video quality settings • Archive for saved files • Sharing of saved files • Calibration • Save location of measurement (optional) • Time and date • Continuous Leq, LAeq, LCeq value • 10 second sound level average (Leq, LAeq, LCeq) • 60 second sound level average (Leq, LAeq, LCeq) • Maximum and minimum decibel level About decibels and sound level measurement The unit for measuring sound is called a decibel. Because the decibel scale is logarithmic, a sound with an intensity that is twice that of a reference sound corresponds to an increase of about 3 decibels. The reference point of 0 decibel is set at the intensity of the least perceptible sound, the threshold of hearing. On such a scale a 10-decibel sound is 10 times the intensity of the reference sound. Highlighting this is important as already a few decibels higher or lower makes a noticeable difference in how noise is perceived. The preferred method to describe sound levels that vary over time, resulting in a single decibel value measuring the total sound energy over the period, is called Leq. It is however common practice to measure sound levels using A-weighting, which attenuates lower and higher frequencies that the average person cannot hear. In this case the value is called LAeq. A- and C-weighting The A-weighting is a standard, commonly used filter that attempts to alter the measured sound pressure levels to more closely match the perception of the human ear. A-weighting makes the sound level meter less sensitive to very high (over 8000 Hz) and low frequencies (below 1000 Hz). C-weighting also attenuates low and high frequencies, but the attenuation of low frequencies is much less severe compared to A-weighting. Calibrate: Calibrate the application using the calibration tool found in the settings menu. Phones and their components vary in quality and setup so you need to calibrate the app in order for the results to be relatively comparable. One suggestion is that you close the window and door to your bedroom or bathroom, turn off appliances, and once its very quiet calibrate the app so the reading is about 30 decibel.

Altimeter AR is a smarter altimeter for iPhone and Apple Watch. It combines GPS altitude, barometer data, pressure trends, route tracking, terrain elevation, and AR-style labels into one clean altitude dashboard. Instead of showing only one number, Altimeter AR helps you understand how reliable your altitude reading is with an Accuracy Engine, sensor details, and clear status explanations. Key features: - Live altitude in meters or feet - Accuracy score based on GPS, barometer, terrain data, and signal stability - Barometer and pressure trend tracking - Route recording with elevation gain, descent, highest and lowest points - Terrain Map with route, altitude markers, and elevation context - Elevation Timeline with interactive altitude and pressure charts - Floor Altimeter for approximate floor climbing and vertical movement - Elevation Lens with AR camera-based terrain labels and heading-aware overlays - Saved sessions with elevation stories, route summaries, charts, maps, and photos - Live Activity for active recording sessions - Apple Watch companion app with altitude, ascent, pressure, route stats, and quick controls - Local history stored on device - Offline-friendly GPS and barometer altitude tracking Altimeter AR is designed for hiking, mountain walks, city climbs, travel, skiing, cycling, and anyone who wants more context than a basic altimeter can provide. Use it to see your current altitude, understand pressure changes, follow your route elevation, compare GPS with terrain data, and review every climb after your session. Pressure trend information is based on sensor changes and should be treated as guidance only. Altimeter AR does not provide an official weather forecast or safety-critical navigation data.