Comparison

Scoliometer vs 3D

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Scoliometer

This app provides a convenient and accurate digital tool for measuring spinal curvature at home or in a clinical setting. It offers an expanded measurement range compared to traditional devices and includes a step-by-step guide for easy use.

Highlights
  • Digital scoliometer for measuring spinal curvature
  • Measures trunk rotation angle
  • Expanded measurement range up to 50 degrees
  • Easy-to-follow four-step guide
  • Available in 17 languages
  • Suitable for medical professionals and home users
Features
Currently charting
Read full description

THE #1 SCOLIOSIS SCREENING APP — TRUSTED IN 75+ COUNTRIES Developed by Dr Kevin Lau, D.C. — NGO Representative to the United Nations Turn your iPhone into a clinical-grade scoliosis screening tool. Scoliometer measures the Angle of Trunk Rotation (ATR) in seconds — the fastest, most affordable way to check for spinal curvature at home or in the clinic. Trusted by doctors, physiotherapists, chiropractors, and parents in over 75 countries. WHY SCOLIOMETER? • Measures spinal curvature from 0° to 50° — beyond the range of most physical scoliometers • Accurate trunk rotation readings using your iPhone's built-in sensors • Screens for mild to severe scoliosis in seconds • Trusted by medical professionals as a reliable screening companion • No expensive equipment — clinical-grade results right in your pocket • Personalise the meter with beautifully designed skins HOW IT WORKS Have the patient bend forward into the Adam's Forward Bend position and place your iPhone across the spine. Scoliometer instantly reads the Angle of Trunk Rotation, helping identify curves that may need further evaluation. FOR PROFESSIONALS & FAMILIES Whether you're a clinician running routine screenings or a parent monitoring your child's spine at home, Scoliometer gives you a fast, non-invasive check — anytime, anywhere. No appointment needed. FROM A WORLD AUTHORITY ON SCOLIOSIS Dr Kevin Lau is an award-winning chiropractor, bestselling author, and NGO Representative to the United Nations. His bestselling books and clinical research have helped thousands of patients worldwide take control of their spinal health without surgery. Every feature of Scoliometer reflects his decades of expertise. DISCLAIMER Scoliometer is a screening tool and is not a substitute for professional medical diagnosis. Always consult a qualified healthcare provider for clinical evaluation and treatment decisions.

About

3D

Features
Read full description

Capture Precise 3D Scans. Faster. Easier. Built for O&P. 3D-Sidekick is the go-to scanning app for orthotists and prosthetists who need high-quality 3D models — without the complexity. Whether you're scanning a limb, foot, or any body-part, 3D-Sidekick delivers clean, accurate results in seconds. Built specifically for O&P workflows, it helps you: Save time with fast, intuitive scanning Capture clean, usable scans — every time Attach picture, forms or information to your scans before exporting Export in STL or OBJ formats ready for your design tools Compatible with TrueDepth and Structure Sensor, and powered by the proven Structure SDK, 3D-Sidekick combines medical-grade performance with ease of use. Forget clunky tools or generic scanners — this is scanning done right for O&P professionals. Privacy Policy: https://skhosting.blob.core.windows.net/policies/3d-sidekick-privacy-policy-EN.html Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Scoliometer4 screens
3D4 screens

Verdict

The call

The clearest difference is price: 3D at Free against Scoliometer's $9.99. Scoliometer's advantage is in-app purchases (none vs 3) and update cadence (every 3 weeks vs every 2 months). On ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

3D is free to download; Scoliometer costs $9.99 up front. 3D sells 3 in-app purchases, starting at $19.99 per 7 days. Scoliometer asks for nothing beyond the download.

UpkeepUpdate frequency

Scoliometer ships an update every 3 weeks, 3D every 2 months. The most recent releases landed on September 28, 2026 and September 23, 2026 respectively.

Scorecard5 real differences · 6 level
Scoliometer versus 3D: the parameters behind the verdict, then further details
ParameterScoliometer3D
Price$9.99Free — better
Rating4.1 (14 ratings) — better—
Positive reviews82.1% of reviews—
Number of ratings14 — better—
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
Best chart rank#96 — better—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.2
Further details — not scored
Size46 MB45 MB
Age rating12+17+
DeveloperKevin LauSidekick Interactive, Inc.

Bugs and requests

Scoliometer

Reported bugs

3 issues
  • App does not rotate with phone
  • Image does not rotate to the other side
  • Privacy policy website is blank

Requested features

4 requests
  • Ability to pause the meter
  • Option to rotate the app the other way
  • Adjust meter to help with more severe curvature
  • Ability to save measurements

3D

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Scoliometer

No in-app purchases

3 purchases

3D

Subscriptions3
  • Weekly Plan7 Days trial$19.997 Days
  • Monthly Plan7 Days trial$49.991 Month
  • Annual Plan7 Days trial$499.991 Year

Questions

Is Scoliometer free?
Scoliometer costs $9.99, with no in-app purchases.
Is 3D free?
3D is free to download, with in-app purchases available.
Do Scoliometer or 3D have ads?
Neither Scoliometer nor 3D shows ads.
Which is updated more often, Scoliometer or 3D?
Scoliometer ships an update every 3 weeks, and 3D every 2 months. Most recently, Scoliometer was updated on September 28, 2026 and 3D on September 23, 2026.

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