SitApp vs SitSense: Two Webcam Posture Trackers, Compared

The first question anyone asks about a posture app is whether it is uploading video of them. For both of these, the answer is no. SitApp states that the webcam feed never leaves your computer and that its model runs on-device. SitSense runs pose estimation in the browser tab through MediaPipe and sends nothing but numbers to a server.

That is worth stating plainly because it is the field these two are in, and it is not universal — plenty of posture tools do send frames somewhere. Between these two specifically, privacy is not a deciding factor, and an earlier version of this article said otherwise. That was wrong and has been corrected.

SitApp is a native application. You download it, it runs beside everything else, and it watches you regardless of what you are doing — writing in a desktop editor, in a video call, in a game. If your work is not in a browser, that is the whole argument, and it is a good one.

SitSense is a browser tab. Nothing to install, nothing to update, no admin rights needed, and it works the same on a locked-down work laptop as on your own. The cost is symmetrical: close the tab and it stops watching. If you spend your day in a browser, that is a fair trade. If you do not, SitApp covers ground SitSense cannot reach.

SitApp's free plan includes one hour of posture monitoring per day. That is a real product rather than a teaser, but a normal working day is longer than an hour, so the free tier covers part of it and the rest is unmonitored.

SitSense is free without a session limit. The companion, the reef, unlimited sessions and the morning summary are all in the free tier with no trial and no card. Paid opens every past session for review rather than only your most recent one.

SitApp also runs a 7-day Pro trial with no card required, which drops to the free plan rather than charging you.

Both tools can tell that your neck has gone forward. The question is what they do with that.

SitApp alerts you. It is a reminder system, and reminder systems work while you are still willing to be reminded. The failure mode is well documented and it is not technical: people mute them.

SitSense changed shape in August 2026 specifically because of that failure mode. Instead of alerting you, sitting well produces light for a companion you hatch, and she uses it to bring a bleached reef back to colour one object at a time. There is no score, no streak and no leaderboard — those were removed. Whether that is better is genuinely a matter of taste. If you want a tool that stays out of the way and pings you when you slouch, that is a reasonable thing to want, and it describes SitApp more than it describes SitSense now.

SitSense reads seven angles individually: neck angle, craniovertebral angle, trunk angle, shoulder slope, forward head position, head tilt and neck rotation. They are calibrated against your own baseline at the start of every session rather than against a fixed ideal, because a camera that moved between yesterday and today would otherwise read as a posture change.

SitApp does not publish a per-metric breakdown, so a like-for-like comparison here is not possible and this article will not invent one. If per-metric detail matters to you, check their current documentation rather than taking our word for it.