FixYourDeck vs Phone Diagnostics

FixYourDeck turns your iPhone and a class-compliant USB audio interface into a complete measurement bench for cassette decks — the instruments a service workshop used to need a rack for. MEASURE • Frequency response 20 Hz – 20 kHz, both channels, with -3 dB bandwidth and chain-baseline subtraction • Wow & flutter to IEC 386 / DIN 45507 (weighted peak, weighted and unweighted RMS, wow/flutter split) with a flutter spectrum that names the worn rotating part • Speed error and long-term speed drift • Noise and signal-to-noise (flat, A-weighted, CCIR-468), MOL and SOL, dynamic range • Azimuth with live level, phase and inter-channel timing meters — set the azimuth of discrete heads with ease, using the special azimuth test tape or any well-recorded prerecorded tape • Diagnostics: modulation noise, crosstalk, erase efficiency, dropout counter ALIGN Guided assistants for bias (over-bias from the 10 kHz peak), record level / Dolby level, azimuth and playback alignment with a calibration tape — live meters you can turn a screwdriver against. TEST ANY DECK, EVEN A WALKMAN Record the self-describing Measurement Test Tape once on a good deck; each segment announces itself with a digital marker. Play it on any two-head deck or portable and the app grades frequency response, wow & flutter, speed drift and azimuth from playback alone — no monitoring head needed. DOCUMENT Every deck is a profile with its own calibration and saved sessions. Compare before and after service, and export one PDF — the Deck Measurement Protocol — with every value tabulated. TOOLS Oscilloscope (Y-T and Lissajous), tone generator, real-time 1/3-octave analyzer, level meters. WHAT YOU NEED A class-compliant USB audio interface with a stereo line input and output (e.g. a 2-in/2-out interface), cables to the deck's line in/out, and a blank tape. The speed check works with the built-in microphone alone. FREE AND PRO Speed and frequency measurement are free. FixYourDeck Pro — a one-time purchase, no subscription — unlocks all other measurements, the alignment assistants, diagnostics and protocol export. Made by cassette-deck restorers, in 16 languages. No account, no analytics, no data collection: everything stays on your device.

Professional Phone Diagnostics & Hardware Testing Check your phone, test its hardware, monitor device status, and create a detailed inspection report—all in one app. Whether you're checking your own device, troubleshooting a problem, or inspecting a used phone before purchase, this app gives you a convenient way to test and review your device. Comprehensive Hardware Tests Test essential phone components one by one: • Display and touchscreen • Front and rear cameras • Microphone and speakers • Vibration • Flashlight • Face ID / Touch ID • Compass • Network • Storage • CPU and performance • Sensors • Battery status Each manual test can be marked as: Pass / Abnormal / Skipped You can pause and resume an inspection at any time. Used Phone Inspection Buying a used phone? Run through the inspection checklist to check important hardware and device functions before completing a purchase. Review each test individually and create a complete inspection report when you're finished. One-Tap Device Check Quickly review key device information and status, including: • CPU • Memory • Storage • Network • Temperature • Battery status • Hardware • Sensors • System information Get a clear overview of your device without navigating through multiple system screens. Real-Time Monitoring Monitor important device information in real time, including CPU activity, memory, storage, network status, battery state and temperature-related information. Network Tools Built-in network utilities include: • Internet speed test • Ping test • DNS check • Network diagnostics • Port check • Network security tools • Test history Sensors & Utility Tools Check and use your device's compass, level, gyroscope, accelerometer, magnetometer, barometer and proximity sensor. Additional tools include QR code generation and scanning, password generation, flashlight and decibel measurement. Inspection Reports Generate a detailed device inspection report after testing. Save and share your report as an image or PDF, and keep previous reports for future reference. Widgets & Live Activities Use Home Screen and Lock Screen widgets to view important device information at a glance. Supported features also include Live Activities and Dynamic Island for selected device and network information. Important Information Some temperature, CPU, charging and battery-related information is based on publicly available iOS APIs, device state and software analysis. It may be estimated and should not be considered laboratory measurements or official Apple system data. Inspection results are based on user-confirmed test results and are not official certificates or professional device appraisal reports.