five things you didn't know iPhone Safari could do
❤️
Pulse
Your heartbeat. Measured by the rear camera + flashlight. Live BPM.
PPG
📡
Sonar
Distance to the nearest wall — measured by ultrasonic chirp + echo.
ECHO
🛰
Beam
Send a message to another iPhone via inaudible sound. No internet.
SOUND
🪑
Room
Drop a 3D object into your real room via ARKit. One tap, no app.
AR
🌊
Aura
Live frequency spectrum of every sound around you — your phone visualizing what it hears.
FFT
❤ Pulse
—
BPM
Step 1: turn on flashlight (Core → Torch). Step 2: press fingertip flat over the rear camera. Step 3: hold still 15-20 seconds.
📡 Sonar
—m
Point the phone at a wall, 0.5–4 m away. Tap Ping. The phone emits a 19kHz chirp, listens for the echo, and computes distance from the time delay.
🛰 Beam
Type a message. Tap Beam. Phone emits inaudible (~17–19 kHz) tones encoding each character. Other phone in Receive mode picks them up.
…listening…
Hold near the sender phone. Tap Listen.
🪑 Room
iOS AR Quick Look. Tap any model. Safari hands off to ARKit, the model floats in your room through the camera. No app install. This is Apple's built-in AR engine, web-triggered.