Comparison

BackSCNR vs Gnathic

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

Head to head
About

BackSCNR

This radiation-free tool uses surface topography to screen and monitor scoliosis in adolescents. It captures 3D torso scans, analyzes asymmetries, and estimates curve angles to support clinical decision-making.

Highlights
  • Radiation-free scoliosis screening
  • 3D torso capture with TrueDepth or Structure Sensor
  • Asymmetry analysis and curve angle estimation
  • Supports clinical decision-making
  • Rapid analysis via secure web platform
Features
Read full description

BackSCNR (Back Scanner) is a scoliosis screening and monitoring support tool designed to aid in the management of Adolescent Idiopathic Scoliosis (AIS). Using advanced Surface Topography (ST), the app provides a radiation-free and non-invasive way to assess the 3D shape of the human torso, offering a safe alternative for frequent monitoring without exposure to harmful X-rays. Developed through years of leading academic research, BackSCNR is registered with Health Canada as a Class I Software as a Medical Device (SaMD). It is intended for use in individuals aged 10–18 years to assist clinicians in quantifying torso asymmetries and estimating curve angles associated with AIS. Key Features: - Flexible 3D Torso Capture: Capture high-accuracy 3D scans using either the Structure Sensor accessory or your iPhone’s built-in TrueDepth camera. - Asymmetry Analysis: Aids in identifying and tracking torso asymmetries over time. - Clinical Support: Provides detailed metrics, including estimated Cobb angles and deviation color maps, to support clinical decision-making. - Rapid Results: Upload and process models to receive analysis within minutes on our secure web platform. How it Works: 1. Select Your Hardware: The app automatically detects if a Structure Sensor is connected and will default to it for scanning. If no sensor is detected, the app defaults to the iPhone’s TrueDepth camera. 2. Capture the Scan: Follow the in-app guidance to take a 3D scan of the patient's torso. 3. Analyze & Report: Upload the data to the secure BackSCNR website for automated analysis and reporting. Compatibility: - TrueDepth:** Compatible with TrueDepth-enabled iPhones (iPhone X and newer). - OS: Supported on modern iOS devices (iPhone X and later) and compatible iPads. - Sensors: Optimized for Structure Sensor 3; also supports Mark II and Pro models. For more details, visit https://backscnr.com Disclaimer: BackSCNR is intended to aid in the screening and management of postural conditions and is not a substitute for professional medical diagnosis or treatment planning. Always seek the advice of a physician or other qualified healthcare provider with any questions regarding a medical condition. Use of the device for diagnosis should only be done in consultation with a qualified healthcare professional.

About

Gnathic

Features
Read full description

A first-generation smartphone app to evaluate and follow retrognathia (micrognathia) and facial growth in infants. The co-existence of micrognathia and mandibular retrusion with other conditions has received little attention in non-syndromic patients. These include feeding difficulty, oro-myofunctional problems, orthodontic development and airway concerns (references). Clinical diagnosis is often reduced to “clinical impression” in an attempt to avoid invasive diagnostic procedures such as radiographs, CAT scans and other 3D imaging. Screening indices dependent on invasive diagnostics help to define the maxillo-mandibular relationship and other indices have been suspect of inaccuracies. The gnathic-click app algorithm incorporates 5 indices commonly used to define the retrognathic mandible and is useful as a screening tool to predict the retrognathic grower from the time of birth. Its use will build a database to help clinicians identify non-syndromic patients that will benefit from early diagnosis and interceptive treatment. Note: The app is an educational tool for dental professionals involved in early diagnosis and intervention planning of oral facial growth problems in babies/toddlers. Medical Disclaimer: The Gnathic-Click app is designed for educational and informational purposes only and is not intended to replace professional medical advice, diagnosis, or treatment. While the app provides useful insights into retrognathia (micrognathia) and facial growth in infants, it should not be used as a sole tool for medical diagnosis or treatment planning. Always consult with a qualified healthcare professional for personalized medical advice. The use of this app should complement, not replace, the expert judgment of healthcare professionals. Any reliance on the information provided by the Gnathic-Click app is solely at your own risk.

Screenshots

BackSCNR4 screens
Gnathic4 screens

Verdict

The call

The clearest difference is update cadence: BackSCNR at every 2 months against Gnathic's every 6 months. Gnathic's advantage is iOS requirement (12.0 vs 15.4). On price, ads, in-app purchases 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

BackSCNR ships an update every 2 months, Gnathic every 6 months. The most recent releases landed on September 23, 2026 and September 14, 2026 respectively.

Scorecard2 real differences · 8 level
BackSCNR versus Gnathic: the parameters behind the verdict, then further details
ParameterBackSCNRGnathic
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 2 months — betterEvery 6 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.412.0 — better
Further details — not scored
Size42 MB43 MB
Age rating17+17+
DeveloperBackSCNR Inc.David A. Tesini DMD and ASSOC, LLC

In-app purchases

None

BackSCNR

No in-app purchases

None

Gnathic

No in-app purchases

Questions

Is BackSCNR free?
BackSCNR is free to download, with no in-app purchases.
Is Gnathic free?
Gnathic is free to download, with no in-app purchases.
Do BackSCNR or Gnathic have ads?
Neither BackSCNR nor Gnathic shows ads.
Which is updated more often, BackSCNR or Gnathic?
BackSCNR ships an update every 2 months, and Gnathic every 6 months. Most recently, BackSCNR was updated on September 23, 2026 and Gnathic on September 14, 2026.

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