The short answer
Choose a Mac-only app or cross-platform support.
Both apps process posture locally and use gentle feedback. Plumb focuses on sustained drift, recovery, and three personal poses. SitApp offers a friendly Droid, a free plan, and Mac, Windows, and Linux support.
Show Plumb how you sit, receive a quiet alert after you remain slouched, and keep your posture history on your Mac.
Its Droid, streaks, and named slump patterns add more visual feedback than a quiet Mac utility.
Your free trial starts with the first monitoring session, not the download.
At a glance
Plumb vs SitApp at a glance
Compare what each product asks you to install, wear, permit, notice, and pay for.
| What changes for you | Plumb | SitApp |
|---|---|---|
| How it notices posture | On-device Mac camera model, calibrated to three personal positions | Webcam posture detection using on-device AI |
| How it responds | A quiet reminder after posture drift persists | A Droid with silent, voice, or visual nudges when slouching begins |
| Personal setup | Learns upright, natural slump, and looking-down positions | Good and slouch posture calibration, with quick recalibration for different setups |
| What progress looks like | Local posture time, recoveries, and longer-term trends | Daily streaks, weekly trends, posture time, and named slump patterns |
| Where it works | macOS | macOS, Windows, and Linux |
| What you need | A Mac and a useful camera angle | No wearable; a built-in or external webcam is required |
| Before you pay | Complete 3-day trial with no card or account | Free-forever plan with one hour of daily monitoring; Pro has a seven-day trial |
| Price checked 23 July 2026 | $3.99 monthly, $34.99 annually, or $45 founding lifetime | Free plan; Pro is $34.99 yearly or $89.99 lifetime |
The daily routine
Plumb is Mac-only; SitApp also supports Windows and Linux.
Plumb waits before showing a quiet reminder and records recoveries on Mac. SitApp adds a Droid, streaks, a free daily hour, and support for Mac, Windows, and Linux.
SitApp requires no wearable; a built-in or external webcam is required. It supports macOS, Windows, and Linux. Check whether that hardware and platform setup works at the desk where you need reminders.
Show it upright, your natural slump, and the position you use when looking down.
Plumb processes the camera view on your Mac and ignores brief reaches and shifts.
A quiet cue appears after you remain slouched and clears when you return to the upright position you recorded.
The first week
How each product sends posture feedback
Plumb begins by asking for three examples from your real desk setup: upright, your natural slump, and the position you use when looking down. That gives the app a personal reference before it starts coaching. You then begin a monitoring session and continue working while classification stays on the Mac.
Plumb ignores brief movements. A quiet reminder appears after your posture stays outside the calibrated range. The reminder clears after you return, and Plumb records the recovery.
SitApp uses good and slouch posture calibration, with quick recalibration for different setups. During use, it relies on webcam posture detection using on-device AI and responds with a Droid with silent, voice, or visual nudges when slouching begins.
Plumb records posture time, recoveries, and longer-term patterns on your Mac. SitApp offers daily streaks, weekly trends, posture time, and named slump patterns. Compare the reports and decide which measurements you would use.
Plumb waits, reminds you, and records recovery
A quiet cue appears after sustained slouching and clears after you return to your calibrated range.
Cross-platform access and a useful free tier
Main drawback: Its Droid, streaks, and named slump patterns add more visual feedback than a quiet Mac utility.
The coaching experience
Compare reminder styles, calibration, and progress tracking.
Plumb waits to see whether a posture change lasts, then shows one quiet cue. The delay prevents brief reaches, reading positions, and normal movement from triggering alerts.
SitApp responds with a Droid with silent, voice, or visual nudges when slouching begins. Its main advantage is cross-platform access and a useful free tier. Its main drawback is its Droid, streaks, and named slump patterns add more visual feedback than a quiet Mac utility.
After a Plumb reminder, returning to your calibrated range clears the cue. Plumb stores posture time, recoveries, and longer-term patterns on the Mac.
Record three positions, start monitoring, and receive a cue after you remain slouched for the delay you selected.
Pick your trade-off
Compare the daily setup and maintenance
- Want the app to wait before alerting you about a brief posture change.
- Want upright, natural slump, and looking-down examples in calibration.
- Prefer a quiet Mac app without a character or streaks.
- Care about recovery as well as time spent in each posture.
- Need Windows or Linux support.
- Want to begin on a permanent free plan.
- Respond well to a playful visual companion.
- Want streaks and named slump patterns in the dashboard.
Plumb only works on Mac and needs a clear camera angle. SitApp has this drawback: its Droid, streaks, and named slump patterns add more visual feedback than a quiet Mac utility.
Privacy and setup
Compare camera, device, and account privacy
Plumb uses the Mac camera to compare your current head and shoulder position with the three positions you recorded. It processes frames on the device, discards them during use, and keeps posture history on the Mac. Camera images and posture history are excluded from diagnostics. No account is required for the three-day trial.
That model still has a clear requirement: you must be comfortable granting camera access and have an angle that can see your working position. If your camera is closed, obstructed, or pointed away while using an external display, Plumb cannot coach the session properly.
SitApp has this setup requirement: No wearable; a built-in or external webcam is required. Its documented privacy position is on-device processing; SitApp says footage is not uploaded or saved and detection works offline. For some buyers, that removes the permission they care about most. For others, it adds hardware, account, sync, or platform requirements that make everyday use less convenient.
Read the privacy policy, check the required hardware or account, and test whether you can pause the product during calls and other unsuitable tasks.
Try before you commit
Compare trial terms and prices before paying
You can use Plumb’s complete coaching loop for three days without a card or account. The trial begins when monitoring starts, so downloading it early does not waste any of the trial.
For SitApp, the documented trial is: Free-forever plan with one hour of daily monitoring; Pro has a seven-day trial. The price when checked was: Free plan; Pro is $34.99 yearly or $89.99 lifetime. Pricing can move, so confirm the current offer before buying.
No card. No account. No cloud posture history.
Common questions
Plumb vs SitApp FAQ
Is Plumb better than SitApp?
Plumb is the stronger fit for Mac users who want three-pose personal calibration, reminders after sustained drift, and local recovery trends. SitApp is the stronger fit for people who prioritise cross-platform access and a useful free tier.
What is the biggest difference between Plumb and SitApp?
Plumb uses a quiet reminder after sustained posture drift. SitApp provides a Droid with silent, voice, or visual nudges when slouching begins.
What equipment does SitApp require?
No wearable; a built-in or external webcam is required
How does SitApp handle privacy?
On-device processing; SitApp says footage is not uploaded or saved and detection works offline
How much does SitApp cost?
Free plan; Pro is $34.99 yearly or $89.99 lifetime. Pricing was checked on 23 July 2026; verify the current official offer before purchasing.