How to track positional sleep changes with on-device video

The Limits of Audio-Only Sleep Audits

Audio logs tell you that you snored. They do not tell you why. If you want to know whether side sleeping, cutting late-night alcohol, or setting up a CPAP machine actually reduces your airway noise, sound alone falls short. You need visual confirmation of your sleeping position when the noise spikes.

Most visual tracking systems push bedroom video streams to external cloud servers. That is an unnecessary privacy trade-off. You do not need to send private footage off your phone to catch midnight physical triggers. An on-device audit captures triggered events, captions them locally, and keeps all video encrypted under your iPhone passcode.

Setting Up Nightstand Hardware and Framing

Physical placement determines whether your morning audit yields clear facts or useless frames. Set up your iPhone before turning off the lights using a simple physical protocol.

Camera Aim and Elevation

Prop your iPhone on a stable nightstand adjacent to your mattress. Aim the rear camera directly at the bed, keeping your head and torso clearly in the frame. The lens needs an unobstructed line of sight so the system can evaluate motion and posture changes.

Power Management

Plug the phone directly into a wall charger. Continuous local sensing using the microphone and vision model consumes roughly 30 to 40 percent of an iPhone battery over a full night. Running on battery power alone creates an unnecessary risk of the phone shutting down before morning.

Running the Local Capture Protocol

Setting up the software side takes seconds before bed. Open SnoreCam on your iPhone.

Health Data Permissions

If you want to track sleep duration, allow the app to connect to Apple Health during setup or from your settings menu. The app writes only your bedtime and wake time to Apple Health. It never reads your existing Health data, nor does it write audio files, video clips, captions, or Snore Scores to Apple Health.

Starting Nightly Capture

Tap Start and set the phone down. The app listens and monitors through the night without creating massive, unmanageable video files. Live camera frames pass through the local processor, trigger checks run entirely on-device, and clean frames get discarded instantly. Video is saved only when a trigger fires—specifically snoring, sleep-talking, coughing, or significant movement.

Reviewing the Morning Highlight Reel

In the morning, tap Stop to end the session. Instead of scrubbing through eight hours of dark footage, you receive a highlight reel containing three to five short clips of key night events.

Reading Captions and Audio Playback

Each clip runs up to 30 seconds. An on-device vision-language model generates plain-English captions for each saved moment, describing actions like sitting up or mumbling. You can review clips with full video or select audio-only playback if you prefer to listen to the sound profile without watching the clip.

Retention and Storage Control

Star clips that show important positional triggers or severe snoring events. Starred items stay saved locally on your iPhone. Unstarred clips auto-delete after 14 days, preventing video files from filling your storage. Because there are no external servers or cloud pipelines, your data remains encrypted with your phone passcode. It only leaves the phone if you choose to export a file using the iOS Share menu.

Tracking Results Across Seven Nights

Single-night tests are vulnerable to random variables like extreme fatigue. To verify whether a positional habit change works, track metrics over a full week.

Interpreting the Snore Score

The app outputs a nightly Snore Score from 0 to 100 based on snoring duration and volume detected by the microphone stream. Light snorers generally register near 20, moderate snorers score near 50, and heavy snoring pushes the index to 80 or above. Because the math runs locally from raw audio, the calculation remains consistent across nights.

Correlating Position and Trends

Tap any dot on the nightly intensity timeline to play the exact moment your score peaked. Look at your posture in the video frame. If your highest scores consistently match moments when you rolled onto your back, test side sleeping on subsequent nights. Use the 7-night trend line to confirm whether positional shifts, avoiding alcohol, or a CPAP appointment actually move the score down.

Subscription Requirements

First-time users get three free nights of monitoring without entering credit card details. Completing a full seven-night tracking baseline requires a subscription, priced at $9.99 per month or $59.99 per year.