In iOS 17 and iOS 18 on iPhone models equipped with TrueDepth and advanced Bionic/A-series neural engines, Apple introduced 3D augmented reality (AR) Reactions in FaceTime and supported third-party video calling apps. Instead of tapping on-screen emojis, users can perform natural physical hand gestures in front of the camera to trigger immersive 3D visual effects that wrap around their video feed. While these reactions enhance casual conversations with friends and family, understanding how to trigger—or disable—them is essential to avoid awkward visual bursts during professional video calls.
Supported Physical Hand Gestures and 3D Visual Effects
FaceTime tracks your hands in three-dimensional space to recognize eight specific gesture combinations, rendering cinematic particle animations across the screen:
- Heart Gesture (Two Hands): Form a heart shape with both hands held in front of your chest to release floating 3D red hearts.
- Single Thumb Up: Hold one thumb upright toward the camera to display an animated blue thumbs-up dialogue bubble.
- Two Thumbs Up: Raise both thumbs simultaneously to trigger a dramatic multi-coloured fireworks display that darkens the background.
- Single Thumb Down: Point one thumb downwards to display a grey thumbs-down bubble.
- Two Thumbs Down: Point both thumbs downwards with both hands to trigger a gloomy rain shower animation with storm clouds.
- Single Peace Sign (V-sign): Hold up index and middle fingers on one hand to release a cluster of floating celebration balloons.
- Two Peace Signs: Flash two peace signs simultaneously with both hands to unleash a vibrant confetti canon burst.
- Two-Handed “Rock On” Horns: Raise index and little fingers on both hands to initiate an energetic colourful laser light show.
Triggering Hand Gesture Reactions in FaceTime
To successfully activate augmented reality effects during a video call:
- Open the FaceTime app on your iPhone (requires iPhone 12 or newer running iOS 17 or iOS 18).
- Start or join a video call.
- Position yourself so your hands are clearly visible within the camera’s field of view, maintaining reasonable distance from your face and chest.
- Perform the chosen hand gesture cleanly and hold your hands steady for approximately one to two seconds.
- The iPhone’s Neural Engine recognizes the skeletal hand posture and projects the 3D augmented reality animation across your video frame. Both you and the call participants will see and hear the sound effect in real time.
Enabling or Disabling Reactions via Control Centre
Because gestures can accidentally fire during natural body language or professional business meetings, Apple allows users to toggle the feature on or off quickly:
- While actively on a FaceTime call (or third-party video app such as Zoom or Microsoft Teams), swipe down from the top-right corner of your iPhone screen to open Control Centre.
- Tap the green Video Effects button located in the top-left section of Control Centre.
- Tap the Reactions icon to switch the feature between On and Off.
- When turned Off, making hand gestures will not trigger fireworks, balloons, or laser animations.
- Swipe upwards to dismiss Control Centre and return to your video call.
Troubleshooting Gesture Detection and Lighting Requirements
If hand gesture reactions fail to trigger reliably:
- Improve Environmental Lighting: The camera and neural engine rely on contrast to detect finger positions. Dimly lit rooms or heavy backlighting from windows behind you can hinder hand tracking.
- Hold Position Steady: Fast, fleeting gestures are ignored to prevent false positives. Hold the gesture firmly for at least one full second until the animation begins.
- Check Third-Party App Compatibility: While FaceTime natively enables Reactions by default, third-party apps like Google Meet or Zoom must utilize Apple’s standard iOS Camera API. Always check the Control Centre Video Effects panel to confirm whether Reactions is active in the currently running app.