Everyone knows their head leans forward when they look at their phone. Almost no one notices it happening.

Nod is an iPhone app that turns “almost no one notices” into a short cue at the ear.

Why we built it

There are already plenty of posture reminders. Most of them open the camera at your face, fire vibration on a hunch from your Watch, or ask you to wear another device on your neck.

None of them stuck. People got tired of being filmed, switched off the false positives, or stopped clipping on the extra hardware.

We wanted to give the noticing job to something you already wear every day. The answer turned out to be inside your AirPods.

How it works

AirPods that support head tracking — AirPods 3, AirPods 4, AirPods Pro, and AirPods Max — already report your head orientation.

Nod reads that orientation once a second and plays a single short tone at the ear only when forward tilt has been sustained for long enough. No camera. Nothing leaves the device — every decision is made on your iPhone.

The cue is a soft 600 Hz triple-tone, about 0.6 seconds long. It layers on top of your music or call without ducking either of them. After a cue, Nod stays quiet for the cooldown you choose (none / 15 / 30 / 60 minutes).

What you can try first

The download will be free.

When you open the app, you can confirm your AirPods can deliver head angle. Tip your head forward and the live angle moves. After about 3 seconds, you’ll hear the demo cue. We put this up front so you can test the experience the way you’d test a demo unit at an electronics store, before buying.

After that, you get 14 days to try the real thing in your day. Does it stay out of your way? Does it actually help your posture? You decide after living with it.

Pricing

  • Monthly: $3.99
  • Annual: $29.99 (≈ 2 months free vs monthly)

You’ll be able to cancel from your Apple ID subscription settings at any time.

What comes next

Nod ships as a quiet MVP. From there, we plan to add posture pattern analysis, Apple Watch support, and continued localization — in the order users tell us they need.

The contact form will open at launch. Every message gets read.

— Gigaptera