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Free download

You're one click away
from better posture.

Setup takes about 5 minutes. The Droid uses on-device AI to watch your posture and gives you a gentle nudge when you slouch.

100% private
Ready in about 5 minutes
Mac · Windows · Linux
System requirement: SitApp uses a prebuilt AI engine that needs glibc 2.38 or newer. That means Ubuntu 24.04+, Debian 13 (Trixie)+, Fedora 39+, Arch, or any modern rolling-release distro. Older systems (Ubuntu 22.04, Debian 12) will fail to start the posture detector. Check yours with ldd --version.

Desktop App Only

SitApp is currently available for macOS, Windows, and Linux computers.

On your phone? Send yourself the link and grab it on your computer.

Sent - check your inbox on your computer.

Explore Features
The SitApp Droid waiting for you
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Open the SitApp.dmg file and drag SitApp to your Applications folder.

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Run the SitApp-Setup.exe installer from your Downloads folder. If Windows shows “Windows protected your PC”, click More info, check the publisher is Aston Smith Ltd, then click Run anyway.

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Make the SitApp.AppImage executable and run it:

chmod +x SitApp-*.AppImage && ./SitApp-*.AppImage

Downloaded .deb instead? Install with: sudo dpkg -i SitApp-*.deb

Having trouble? Download again

AppImage runs on any Linux distro - no installation needed!

Safe & Verified

Signed and verified, so your computer can tell who made it

Apple Notarized

Our macOS app is notarized by Apple, meaning it has passed their automated security checks. The first time you open it, macOS asks if you're sure - click Open.

Signed Installer

If Windows shows “Windows protected your PC”, click More info, check the publisher is Aston Smith Ltd, then click Run anyway.

Open Source Friendly

Distributed as AppImage and .deb packages — no snap, no flatpak, no store account required. Just download and run.

Private by Design

All posture analysis happens locally on your device. Your camera feed is never recorded, stored, or sent to any server.

What Happens Next

Here's what to expect after you install

Sign In

Sign in with Google in a few seconds, or with email (you'll confirm your address first). New accounts get a 7-day Pro trial, no card.

Show the Droid Your Posture

Show SitApp your good posture and your typical slouch. That's all it needs to learn your patterns.

Sit Back & Relax

SitApp runs quietly in the background and gives you a friendly nudge whenever you start slouching.