If you’re narrowing down your posture app choice to SitApp and PostureNet, you’re comparing two webcam-based AI tools that detect slouching in real time. But they differ in important ways — especially platform support and pricing.
Full disclosure: I built SitApp. I’ll be fair about what PostureNet does well.
Quick Comparison
| Feature | SitApp | PostureNet |
|---|---|---|
| Platforms | Mac, Windows, Linux | Mac only |
| Free tier | Yes (core features) | 24-hour trial only |
| Paid price | $3.99/mo or $34.99/yr | $4.99/mo or $49.99/yr |
| AI posture detection | Yes (on-device) | Yes (on-device) |
| Custom calibration | Per-location profiles | Standard model |
| Linux support | Yes | No |
| Windows support | Yes | No |
Platform Support
This is the biggest difference. PostureNet is Mac-only. If you use Windows, Linux, or switch between operating systems, PostureNet isn’t an option.
SitApp runs on Mac (Intel + Apple Silicon), Windows, and Linux. If you work across multiple machines or might switch platforms in the future, SitApp has you covered.
Winner: SitApp — three platforms vs one.
Pricing
PostureNet costs $4.99/month or $49.99/year, with only a 24-hour free trial. Once the trial ends, you need to subscribe.
SitApp costs $3.99/month or $34.99/year, and has a permanent free tier with core posture monitoring. You can use the free version indefinitely and upgrade only when you want advanced features.
Winner: SitApp — lower price and a real free tier.
Posture Detection
Both apps use computer vision via your webcam to detect posture in real time, processing everything on your device.
PostureNet uses Apple’s Vision framework on macOS, which integrates tightly with Apple’s hardware. It’s a polished Mac-native experience.
SitApp uses TensorFlow.js, which runs on any platform. The key advantage is location-aware calibration — you can create separate posture profiles for your office chair, standing desk, couch, or anywhere else. PostureNet uses a more standardised detection model.
Winner: Tie — PostureNet has tight Mac integration; SitApp has more flexible calibration.
Who Should Pick What
Choose SitApp if:
- You use Windows or Linux (PostureNet won’t work)
- You want a free tier that doesn’t expire
- You work from multiple setups and want per-location calibration
- You prefer the lower price point
Choose PostureNet if:
- You’re exclusively on Mac and want tight macOS integration
- You prefer Apple-native technology (Vision framework)
- You don’t mind the higher price for a Mac-optimised experience
Bottom Line
For Mac-only users, PostureNet is a solid option with native macOS integration. But SitApp costs less, has a free tier, supports three platforms, and offers location-aware calibration. Unless you specifically want Apple Vision framework integration, SitApp gives you more for less.
Ready to try SitApp? Download it free for Mac, Windows, or Linux.
For a broader comparison, see our 7 best posture apps roundup or our SitApp vs BLiiNK and SitApp vs Zen comparisons.
FAQ
Does PostureNet work on Windows?
No. PostureNet is Mac-only. If you need a posture app for Windows, SitApp supports Windows 10 and 11.
Is PostureNet free?
PostureNet offers a 24-hour free trial only. After that, it costs $4.99/month or $49.99/year. SitApp has a permanently free tier.
Which has better posture detection?
Both use on-device AI via your webcam. PostureNet leverages Apple’s Vision framework; SitApp uses TensorFlow.js with customisable per-location calibration. Both are effective — the choice depends on whether you value Mac-native integration or cross-platform flexibility.