Synapse: Device Check

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.