Comparison

Spine Physics vs Primal's 3D Spine

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

Head to head
About

Spine Physics

This app visualizes how obesity affects the body, using a teeter-totter analogy for the spine to explain the importance of maintaining a healthy abdominal girth. It serves as an educational tool for patients, drawing on a surgeon's perspective.

Highlights
  • Obesity impact visualization
  • Spine teeter-totter analogy
  • Abdominal girth importance
  • Surgeon's educational tool
  • General health information
Features
Read full description

Spine Physics visualizes the effects of obesity on the body. The analogy of the spine to a teeter totter shows the importance of keeping the abdominal girth small and light. As a surgeon, I draw this all the time for my patients to educate them. ***Disclaimer*** No advice: This app (“App)” provides only information, is not medical or treatment advice and may not be treated as such by the user. As such, this App may not be relied upon for the purposes of medical diagnosis or as a recommendation for medical care or treatment. The information on this App is not a substitute for professional medical advice, diagnosis or treatment. All content, including text, graphics, images and information, contained on or available through this App is for general information purposes only Professional Medical Advice and Assistance: You are strongly encouraged to confirm any information obtained from or through this App with your physician or another professional healthcare provider and to review all information regarding any medical condition or treatment with your physician or other a professional healthcare provider. No Reliance: YOU MUST NEVER RELY ON ANY INFORMATION OBTAINED USING THIS APP FOR ANY DIAGNOSIS OR RECOMMENDATION FOR MEDICAL TREATMENT. YOU MUST NEVER RELY ON THE INFORMATION RECEIVED FROM THIS APP AS ALTERNATIVE TO MEDICAL ADVICE FROM YOUR PHYSICIAN OR OTHER PROFESSIONAL HEALTHCARE PROVIDER. YOU MUST NEVER DISREGARD PROFESSIONAL MEDICAL ADVICE OR DELAY SEEKING MEDICAL TREATMENT AS RESULT OF ANY INFORMATION YOU HAVE SEEN ON OR ACCESSED THROUGH THIS APP. IF YOU HAVE ANY SPECIFIC QUESTIONS ABOUT ANY MEDICAL MATTER YOU SHOULD CONSULT YOUR PHYSICIAN OR OTHER PROFESSIONAL HEALTHCARE PROVIDER. IF YOU THINK YOU MAY BE SUFFERING FROM ANY MEDICAL CONDITION YOU SHOULD SEEK IMMEDIATE MEDICAL ATTENTION. No Warranty: The information provided by this App is provided “as is” without any representations or warranties, express or implied. This App makes no representations or warranties in relation to the medical or other information in this App.

About

Primal's 3D Spine

Explore an interactive 3D model of the human spine with detailed anatomical information. This app is designed for medical professionals and students, offering precise visualizations and learning tools.

Highlights
  • Interactive 3D spine model
  • High-resolution cadaver-based reconstruction
  • Pre-set anatomical scenes
  • Layered structure exploration
  • Systemic content browsing
  • Save and share custom views
  • Linked text and 3D models
Features
Read full description

Primal's 3D Real-time Human Anatomy app for the Spine is the ultimate 3D interactive anatomy viewer for all medical educators, practitioners and students. Meticulously built over ten years from high-resolution cross-sectional photographs of real cadavers, the app provides an accurate and visually stunning reconstruction of the anatomy of the spine. The easy to use and intuitive interface lets you choose precisely the anatomy you want to see, from exactly the angle you want to see it. This flexibility is supported by a wealth of user-friendly tools to help you set up your ideal anatomical image, quickly and easily: • The Gallery contains 12 pre-set scenes, designed by an in-house team of anatomical experts, to clearly and comprehensibly present in-depth regional and systemic anatomy of the spine. Each scene is divided into five layers to provide greater control over the depth of anatomy shown; making tailoring the anatomy you want to see simple and quick. • The Contents folders arrange all 1,947 structures systemically, meaning you can browse by subcategory and switch all related structures on at once. It provides an excellent learning tool – for example turn on all branches of the vertebral artery, or the transversospinalis group of muscles. • The Contents layer controls split each system into five layers – from deep to superficial. This allows you to quickly build up different systems to the depth you want to see. **Save to Favourites** Save the views you create for later in the Favourites, save anything as an image, or share with another user as a URL link. Use the pins, labels and drawing tools to customize your images for enlivened presentations, engaging course materials and handouts – all from your iPad! **Informative** Read detailed and accurate text for each structure using the T icon, and in a feature unique to Primal Pictures, each anatomical term in the text is linked to the appropriate model in the 3D model. Selecting these links will highlight the relevant structures, bringing the text to life and make learning anatomy more visual and immediate. **Context** See each structure in context with the anatomy that surrounds it. Explore these relationships and easily navigate to related anatomical structures to expand your learning. Select a field name in the right-hand menu to show the anatomical category and sub-category of the structure for added understanding and simple navigation. **Technical Specifications** iPad 3 and above only. iPad Air and above for optimal viewing. iPhone 6 and above for best performance.

Screenshots

Spine Physics3 screens
Primal's 3D Spine4 screens

Verdict

The call

The clearest difference is rating: Spine Physics at 5.0 against Primal's 3D Spine's 1.0. Spine Physics also leads on in-app purchases (none vs 1) and update cadence (every 2 days vs every 6 weeks). On price, ratings volume, ads and monetization model 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. Primal's 3D Spine sells 1 one-off in-app purchase. Spine Physics asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Spine Physics holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

Spine Physics ships an update every 2 days, Primal's 3D Spine every 6 weeks. Both last shipped on November 3, 2026.

Scorecard3 real differences · 7 level
Spine Physics versus Primal's 3D Spine: the parameters behind the verdict, then further details
ParameterSpine PhysicsPrimal's 3D Spine
PriceFreeFree
Rating5.0 (1 ratings) — better1.0 (1 ratings)
Positive reviews—0.0% of reviews
Number of ratings11
Update frequencyEvery 2 days — betterEvery 6 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.015.0
Further details — not scored
Size10 MB158 MB
Age rating12+12+
DeveloperJonathan NakhlaPharma Intelligence UK Ltd

Customer experience

Spine Physics

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Primal's 3D Spine

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Spine Physics

No in-app purchases

1 purchases

Primal's 3D Spine

One-time1
  • Primal's 3D Spine$39.99

Questions

Is Spine Physics free?
Spine Physics is free to download, with no in-app purchases.
Is Primal's 3D Spine free?
Primal's 3D Spine is free to download, with in-app purchases available.
Which has better reviews, Spine Physics or Primal's 3D Spine?
Spine Physics is rated higher. Spine Physics averages 5.0 out of 5 from 1 ratings, while Primal's 3D Spine averages 1.0 from 1 ratings.
Do Spine Physics or Primal's 3D Spine have ads?
Neither Spine Physics nor Primal's 3D Spine shows ads.
Which is updated more often, Spine Physics or Primal's 3D Spine?
Spine Physics ships an update every 2 days, and Primal's 3D Spine every 6 weeks. Most recently, Spine Physics was updated on November 3, 2026 and Primal's 3D Spine on November 3, 2026.

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