Easy Audio Spectrogram vs Vgent PdM

Easy Audio Spectrogram is a simple real-time audio visualizer for microphone input. It shows live spectrogram and frequency spectrum views, helping you explore voices, instruments, music, room noise, and everyday sounds. The app is built around readability. Instead of adjusting gain values in the blind or fight a fixed color range, Easy Audio Spectrogram lets you adjust the graph’s dynamic range in real time. Use the live spectrum display as a guide, drag the color scale to the range you care about, and instantly get a clearer spectrogram. For music and voice, the app includes a note-based frequency scale and real-time pitch detection, making it easier to see sung notes, instrument pitch, harmonics, and resonance as they happen. The interface is minimal and comfortable to use in any orientation, even upside down. Text and icons rotate, but controls stay where they are, so the app remains easy to use whether the phone is in your hand, on a table, or pointed toward a sound source. You do not have to understand what's an FFT to use this app, the default setting works well and engineering settings have been translated to understandable concepts. You can save clean spectrogram screenshots directly from the app, without the buttons covering the image and without pressing hardware button combinations. This app is free to use, free of pop-ups or advertisement banners, use it to explore music or the science of acoustics. Additional Features: -Noise profile removal, hold the button to record a profile, release to activate. -Analyze harmonics in real time with multi-touch. -Psychoacoustic filter to make the graph reflect perceived sound signature rather than flat physical reality. -Optimized performance for many hours of use without heating up your device or draining the battery.

Vgent helps maintenance teams inspect industrial equipment using vibration measurements and operating sound. Keep measurement points, reports and repair follow-up together for motors, pumps, fans, gearboxes and other equipment. CAPTURE VIBRATION OR SOUND Use the built-in microphone for acoustic inspections and unusual-noise checks. Vibration measurement requires a compatible, calibrated USB vibration sensor connected and bound to Vgent using its supplied pairing QR code. Acoustic recordings reflect changes in sound; they do not replace calibrated vibration measurements. BUILD REPEATABLE INSPECTIONS Create equipment records with photos, measurement locations, directions and operating conditions. Follow multi-point capture rounds, review progress and resume unfinished work. Generate equipment QR labels and scan them to find equipment already saved on your device. REVIEW THE EVIDENCE View overall and point-level reports, waveforms, spectra and capture quality. Add manual review labels to the relevant points while retaining the original diagnostic findings. Filter report history and export PDF reports for maintenance discussions. FOLLOW CHANGES AND REPAIRS Compare compatible measurements over time. Record repair actions, dates, outcomes and photos, then review suitable follow-up measurements. Preview the normal and abnormal samples used when rebuilding a device trend model. KEEP RECORDS ORGANIZED Export and restore complete backup folders through the system Files picker. Backup status helps identify changes since the last export. Optional data contribution is off by default and is separate from access to diagnosis features. OPTIONAL ON-DEVICE INTERPRETATION On supported devices, interpretation organizes saved diagnostic evidence for review without changing the original diagnosis severity. This feature requires iOS 26 or later, Apple Intelligence enabled, a ready on-device model and a supported app language. Reports and trend conclusions remain available when interpretation is unavailable. For useful comparisons, keep measurement location, sensor mounting or microphone position, and equipment operating conditions consistent. Vgent supports inspection and maintenance review; results depend on capture quality and the available evidence. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/