StopSlouching vs SitApp.
Two webcam posture apps that both run their AI on your own machine — no video ever uploaded. We make StopSlouching; SitApp is a well-built cross-platform competitor. They overlap a lot, so the honest answer comes down to a few real trade-offs.
Short version: SitApp gives you more free time per day; StopSlouching needs no install (it runs in your browser), actively coaches you with a targeted stretch when you slump, and — during a limited-time sale — is currently the cheaper of the two.
- Pick StopSlouching if you want to try it in ten seconds with nothing to install, want a guided stretch (not just an alert) when you slouch, or want it living in your Windows system tray. Backed by a 14-day money-back guarantee.
- Pick SitAppif you want the most free monitoring time each day or a native Linux app. (It's normally the cheaper option too — though our current sale undercuts it.)
How they work
Both detect your posture from your webcam using an on-device ML model — StopSlouching uses Google's MediaPipe pose model, SitApp uses TensorFlow.js. In both cases the camera feed never leaves your computer. The mechanism is the same proven idea: real-time biofeedback beats time-based reminders, because the cue arrives exactly when your posture actually slips.
The difference is the shape of the product. StopSlouching runs in the browser— open a tab, grant the camera, and you're being coached in about ten seconds, with an optional native Windows app for always-on tray monitoring. SitApp is a desktop download for macOS, Windows and Linux.
Side by side
| StopSlouching | SitApp | |
|---|---|---|
| Try it without installing | ||
| Runs on | Browser (Chrome/Edge) + Windows app | Mac, Windows, Linux apps |
| On-device, nothing uploaded | ||
| Real-time score + alerts | ||
| Guided stretch when you slouch | — | |
| Head / shoulder / upright sub-scores | — | |
| Free tier | 60 min, lifetime | 1 hour every day |
| Price — monthly | $2.99 (sale) | $3.99 |
| Price — yearly | $24.99 (sale) | $34.99 |
| Money-back guarantee | 14 days | — |
Competitor details verified against sitapp.app (May 2026). “—” means not advertised, not necessarily absent. Prices in USD.
What StopSlouching does better
- Nothing to install. The whole app is a web page — the fastest possible way to find out whether webcam coaching works for your setup, before you commit to anything.
- It coaches, not just alerts. When you slouch, you don't only get a buzz — you get a specific 30-second chair stretch chosen for whichever sub-score (head, shoulders, or uprightness) is weakest right now.
- A 14-day money-back guarantee on every paid plan. If it doesn't change how you sit, you get your money back.
What SitApp does better
- Usually cheaper. At $3.99/mo and $34.99/yr, SitApp normally undercuts our regular $6.99/$49.99 — though during our current limited-time sale ($2.99/mo, $24.99/yr) StopSlouching is the lower price. Outside the sale, if price is the only thing that matters, SitApp wins.
- A more generous free tier. One hour every day, forever versus our one hour total. If you only need light daily monitoring and never want to pay, SitApp's free plan may be all you need.
- A native Linux app. We run on Linux only through the browser; SitApp ships a real desktop app.
Try StopSlouching in your browser — no install.
A full hour free, no signup, nothing to download. You'll know within one work session whether webcam coaching works for you — and you can always grab SitApp instead if price is your priority.
Try the posture coachStill comparing? See the full roundup of posture apps, the wearable angle in StopSlouching vs Upright Go, or our complete guide to fixing your posture.