Is Strack actually cheaper than Upright GO 2?

Not really, at current prices. Strack lists for $64.99-99.99 across the retailers we checked (Brookstone, StackSocial), and Upright GO 2 currently sells for $79 direct — the two sit in the same range rather than different price tiers.

Does Strack track neck or head posture?

Its listings describe only upper-back/spine detection from a single sensor point, the same approach as Upright GO 2 — no neck or head tracking is described. SitSense’s web app measures neck angle and forward head position alongside shoulder slope and trunk angle; the free extension measures the same set except trunk angle.

Is Strack’s posture data private?

We couldn’t find a privacy policy or any statement about data handling from Strack or its "My Strack" companion app across the retailer listings we checked. SitSense states plainly that webcam video is processed in the browser and never leaves the device.

Does Strack require a subscription?

No — it’s a one-time hardware purchase ($64.99-99.99 depending on retailer) with no subscription found. You’ll eventually need to replace the adhesive strips, though one set is included. SitSense is also free with no purchase required to start; its optional Pro tier is $2.92-4.99 a month.

How long does Strack’s battery last?

Retailer listings cite roughly 3-5 days per charge over a USB cable, though the exact connector type isn’t specified anywhere we checked. SitSense runs off your laptop’s own power, so there’s no separate battery to manage.

Strack vs SitSense: A Wearable Sensor vs Browser-Based Posture Software

Side by Side

	SitSense	Strack
Where it runs	Browser tab, nothing to wear	Worn on your upper back via magnet or adhesive
Setup	Open a browser, allow the camera	Charge the device, install the "My Strack" app (iOS 9+/Android 6+), calibrate
Price	Free, unlimited sessions; Pro $2.92-4.99/mo	$64.99-99.99 depending on retailer, one-time
vs Upright GO 2 price	—	Roughly the same as Upright GO 2’s current $79 — not meaningfully cheaper
What it detects	Neck, head, shoulders, and trunk — seven angles in the web app, six in the free extension	Upper-back/spine angle only; sensor type not published
Feedback	A companion reviving a reef, or named-metric alerts	Vibration when you slouch
Battery	N/A — runs off your laptop	Rechargeable, roughly 3-5 days per charge; connector not published
Ongoing cost	Optional subscription only	Adhesive replacements over time; one set included
Data handling	Video never leaves your device	Not published in any listing we could find

The "Cheaper Than Upright GO" Pitch Doesn’t Hold Up Anymore

Strack gets pitched around the web as a budget Upright GO 2 alternative. At current prices, that’s not really true: Strack lists for $64.99-99.99 depending on retailer (Brookstone, StackSocial), and Upright GO 2 itself currently sells for $79 direct from Upright. They’re in the same range, not different tiers — if you’re choosing between the two wearables on price alone, there isn’t much to choose.

What It Doesn’t Publish Matters Too

Strack doesn’t appear to run its own product or support site — what’s available comes from retailer listings (Brookstone, StackSocial, Amazon) and a 2018 feature on its original launch. None of them specify the sensor type behind it, and none describe what happens to the posture data its "My Strack" companion app collects — no privacy policy turned up in anything we checked.

That isn’t proof of anything alarming, but it is genuinely less than Upright GO or SitSense publish about their own data handling, and it’s worth knowing before you commit to wearing something that syncs to an app.

One Sensor Point vs a Full Upper-Body Read

Like Upright GO 2, Strack has a single attachment point on your upper back, so it can tell you your spine has rounded but has no way to separately see your neck, your head, or whether your shoulders are level. That last one matters more than it sounds: in SitSense’s own posture data, uneven shoulders is the single most-flagged problem among desk workers overall — well ahead of forward head posture — and a single center-back sensor has no way to tell your shoulders apart. A webcam sees the whole picture at once, because it’s looking at all of you rather than sensing from one point.

Questions people ask

Is Strack actually cheaper than Upright GO 2?: Not really, at current prices. Strack lists for $64.99-99.99 across the retailers we checked (Brookstone, StackSocial), and Upright GO 2 currently sells for $79 direct — the two sit in the same range rather than different price tiers.
Does Strack track neck or head posture?: Its listings describe only upper-back/spine detection from a single sensor point, the same approach as Upright GO 2 — no neck or head tracking is described. SitSense’s web app measures neck angle and forward head position alongside shoulder slope and trunk angle; the free extension measures the same set except trunk angle.
Is Strack’s posture data private?: We couldn’t find a privacy policy or any statement about data handling from Strack or its "My Strack" companion app across the retailer listings we checked. SitSense states plainly that webcam video is processed in the browser and never leaves the device.
Does Strack require a subscription?: No — it’s a one-time hardware purchase ($64.99-99.99 depending on retailer) with no subscription found. You’ll eventually need to replace the adhesive strips, though one set is included. SitSense is also free with no purchase required to start; its optional Pro tier is $2.92-4.99 a month.
How long does Strack’s battery last?: Retailer listings cite roughly 3-5 days per charge over a USB cable, though the exact connector type isn’t specified anywhere we checked. SitSense runs off your laptop’s own power, so there’s no separate battery to manage.

The one without hardware

No shipping, no charger, nothing stuck to your back.

Every wearable above measures one axis of lean. A webcam already pointed at you measures seven angles.

Fix My Posture

Free to start. Nothing to buy or send back.