Soundra dB Meter vs Synapse

Soundra helps creators, podcasters, and video makers quickly check their recording environment before capture. It shows real-time sound level, room tone, voice peak, average, max, duration, peak hold, calibration, and A/C/Z weighting controls in a hardware-inspired meter interface. Soundra is not just a visual skin. The METER, CHECK, and LOG keys switch between live metering, sound check, and measurement logs. The CALIBRATION knob adjusts the calibration offset, while the A/C/Z WEIGHTING switch changes the weighting mode. Each control updates the readings, status lights, and tactile interface feedback for a hardware-like sound meter experience. Soundra is designed for recording preparation and everyday reference checks. It is not a certified legal, medical, occupational, or laboratory sound level meter.

Buying or selling a used iPhone? Know what works before money changes hands. Synapse helps you test key iPhone hardware — including cameras, speakers, microphones, sensors, buttons, connectivity, and biometrics — then creates a clear pass/fail device report you can share with a buyer, seller, repair shop, or resale listing. QUICK CHECK — FREE Run a basic test in minutes. No purchase required. Tests include: • Display • Touchscreen • Rear camera • Wi-Fi • Bluetooth FULL DIAGNOSTIC Unlock the complete hardware test suite and generate a shareable device report. Full Diagnostic includes: • Front camera and flashlight • Video recording • Microphones and speakers • Proximity sensor • Motion sensors • Screen rotation • Face ID or Touch ID sensor check • Vibration motor • Volume, lock, and mute buttons • GPS / location accuracy • System integrity indicators • Shareable pass/fail report with device details DEVICE CHECKS Purchase Device Checks in the app and save them to your account. Available options: • Single Device Check • 3 Device Checks • 10 Device Checks Sign in with Apple or email to save your purchased Device Checks, view your remaining checks, and use them on this device or another signed-in device. KEY FEATURES • Free Quick Check • Full Diagnostic hardware testing • Shareable pass/fail device report • Device Checks saved to your account • View remaining Device Checks in your Profile • Useful for buying, selling, repairing, or verifying a used iPhone PRIVACY Synapse runs hardware tests on your device. Your account is used to save purchased Device Checks and help you access them across signed-in devices. Permissions may be requested for camera, microphone, location during GPS testing, motion sensors, Bluetooth, Face ID / Touch ID checks, and local network features when needed. Apple, iPhone, Face ID, and Touch ID are trademarks of Apple Inc.