Published by Pelion — we make one of the options below. This is not an independent review. Competitor facts come from their own pages, linked at the bottom, last checked 2026-07-27.
Free posture monitoring for Mac—without a daily limit.
Published by Pelion· Last updated
Most “free” posture apps for Mac cap how long they watch. Pelion monitors all day with no daily limit and no account, but runs only on macOS. SitApp’s free plan covers 1 hour of monitoring per day and also runs on Windows and Linux. A plain repeating reminder costs nothing at all, but it cannot see you.
What “free” should mean here
“Free” covers several different deals, so it is worth being specific about which one you are getting. These are the five things that decide it.
- 01
How long you can monitor
The one that actually decides whether a free tier is usable. A cap measured in minutes per day means the tool is off for most of your working day.
- 02
What the free tier locks
Some products give you the whole feature set for a limited time; others give you a permanent but reduced set. Both are legitimate — they just suit different people.
- 03
Whether an account is required
Needing to sign up to use a local tool is a real cost, and it changes what leaves your machine.
- 04
Where the camera is processed
On-device processing means frames never leave your machine. This is worth checking rather than assuming, because it is the difference between a webcam tool and a webcam service.
- 05
Which platforms it runs on
A tool that does not run on your OS is not free, cheap or anything else — it is unavailable.
The three approaches
| Criterion | Pelion Posture | SitApp (free plan) | A repeating reminder |
|---|---|---|---|
| Free monitoring time | All day — no daily limit | 1 hour of monitoring per day | Unlimited — but it is not monitoring |
| Does it actually see your posture? | Yes — webcam, analysed on-device | Yes — webcam, analysed on-device | No. It fires on a clock whether you are slouching or sitting perfectly |
| What you get for free | Live neck load, today's summary, fatigue & budget, and MCP reading | Monitoring within the daily cap, with alerts | A notification at an interval you choose |
| Account required | No | Not stated on the pages we checked | No |
| Where analysis runs | On-device | On-device | Nothing to analyse |
| Platforms | macOS 14.0+ only | Mac, Windows and Linux | Anything with a clock |
| Cost | $0 for monitoring. Pro is not open and has no price. | Not stated on SitApp's pricing page | Free with tools you already have |
The third column is a category rather than a product — Reminders, Shortcuts, a Pomodoro timer, anything that fires on a schedule. Cells reading “Not stated” mean the vendor does not publish that fact on the pages we checked.
Which one to pick
Best for continuous feedback
Pelion, if you are on a Mac. It is the option here that watches for your whole working day without a cap, and it tells you what your neck is carrying rather than only that time has passed.
Best for cross-platform
SitApp. It runs on Mac, Windows and Linux, and Pelion does not run on Windows or Linux at all. Its free plan is capped at 1 hour of monitoring per day.
Best without a camera
A repeating reminder. If you would rather not have a webcam involved, a scheduled nudge from tools you already own costs nothing. It cannot tell whether you need it — but it also cannot get that wrong in an alarming direction.
Where Pelion’s free tier ends
Being specific, since this page is published by us. Free covers 6things: all-day real-time monitoring, the live neck-load estimate, today’s summary, fatigue & budget, and MCP resources and read tools for local AI agents, plus tuning requests you approve yourself.
Pelion Pro would add advanced history, multi-desk calibration, system notifications, and the agent behaviour tools — a Guard and Recovery layer on top. It does not unlock more monitoring time, it is not open, and it has no price. See the full breakdown →
Privacy, and what none of these can do
Both apps here state that webcam analysis happens on your own machine. That is the claim worth checking for anything you install, because a posture tool that uploads frames is a fundamentally different product from one that does not. How Pelion handles your camera →
None of these is a medical device and none can diagnose anything. A neck load figure is an estimate relative to your own baseline — useful as feedback, not as a measurement of your health. Persistent pain, numbness, weakness or headaches are reasons to talk to a clinician, and no app on this page changes that.
How we compared
Competitor facts were read from that vendor’s own published pages on 2026-07-27 — not from reviews or roundups. Where a vendor does not state something, this page says so instead of inferring it. We have not tested SitApp ourselves, and there are no scores or ratings here. We re-check these pages at least every 30 days — the next re-check is due 2026-08-26, enforced by our pre-deploy checks rather than detected by this page. Pelion’s own figures come from the shipped build.
Sources
Facts about SitApp come from SitApp's own pages. The reminder column describes a category of scheduling tools rather than a named product, so it has no vendor source.
- SitApp — home — SitApp. Checked
- SitApp — Pricing — SitApp. Checked
- SitApp — Local API & Automation — SitApp. Checked
Common questions
Want the two apps head to head instead? Pelion vs SitApp →
Published by Pelion. SitApp is a product of its respective owner and is not affiliated with Pelion.