Sound Scope Analyzer vs PhoneCheck

Sound Scope Analyzer visualizes sound from your microphone in real time — an oscilloscope and spectrum analyzer in your pocket. ● Real-Time Mode • Watch waveforms like on an oscilloscope (a trigger keeps periodic waves steady on screen) • CRT-style afterglow effect you can toggle on and off • Frequency spectrum up to 24 kHz with automatic noise-floor removal, so real sounds stand out clearly • Fixed or auto scaling for each axis; pinch to zoom and drag to pan ● Timbre Mode • Automatically detects a sustained long tone (like singing “ahh”) and analyzes it with high frequency resolution • Shows the fundamental note name and frequency, with offset in cents • Marks each harmonic peak with its note name and measured frequency • Save the analysis result to Photos as an image • Sound source presets: voice, whistle, piano, guitar, bowed strings, and winds ● Great for • Long-tone practice and tone checks for winds, strings, and vocals • Comparing the harmonic structure of different instruments • Learning the physics of sound: frequency, waveforms, and harmonics • Exploring the sounds around you ● Privacy All audio is processed entirely on your device. Nothing is ever recorded, stored, or transmitted. Available in English and Japanese.

PhoneCheck helps you inspect a used phone before you buy it. Buying a second-hand device from a marketplace, reseller, or another person? Run a guided hardware inspection and check the most important functions before handing over your money. PhoneCheck walks you through practical tests and creates a clear inspection result based on the checks you actually perform. COMPLETE DEVICE INSPECTION Test important parts of the device through a simple guided process. Screen Tests • Touchscreen grid test • Multi-touch test • Dead pixel check • OLED and image retention check • Display brightness check Audio Tests • Main speaker • Earpiece • Microphone recording and playback Camera Tests • Rear camera • Front camera • Focus test • Flash and torch test Sensor Tests • Accelerometer • Gyroscope • Compass • Proximity sensor • Haptics and vibration Connectivity Tests • Wi-Fi and network connectivity • Bluetooth • GPS and location • Cellular connectivity PHYSICAL INSPECTION PhoneCheck also guides you through important checks that require visual or manual inspection, including: • Side and volume buttons • Charging port • Face ID or Touch ID • Screen condition • Back glass condition • Front and rear cameras • Speaker and microphone condition DEVICE INFORMATION View useful information available from the device, including: • Device model • Operating system version • Storage capacity • Available storage • Battery percentage • Charging status • Display information • Sensor and camera capabilities PhoneCheck uses public system APIs and does not claim access to restricted information that third-party applications cannot reliably obtain. CLEAR INSPECTION RESULTS After completing the inspection, PhoneCheck summarizes the results using easy-to-understand statuses: . Passed . Needs Attention . Failed . Skipped or Unavailable You can quickly see which areas performed correctly and which ones deserve a closer look before purchasing the device. RETEST PROBLEMS Found something suspicious? Run failed or questionable tests again without repeating the entire inspection. SAVE YOUR INSPECTIONS Keep previous inspection results on your device so you can review and compare devices later. BUILT FOR SECOND-HAND BUYERS PhoneCheck is useful when checking a device from: • Facebook Marketplace • eBay • Local marketplaces • Used-device stores • Refurbished-device sellers • Private sellers PhoneCheck reports only the results of tests performed using the app and user-confirmed inspection items. It does not guarantee a device's authenticity, ownership status, repair history, future performance, or overall condition.