Comparison

SagittalMeter Lite 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

SagittalMeter Lite

This application assists medical practitioners in measuring crucial sagittal balance parameters directly from sagittal X-rays. It helps analyze spine problems and pre-operative planning by calculating pelvic incidence, pelvic tilt, and sacral slope.

Highlights
  • Measure sagittal balance parameters
  • Directly use phone on X-rays
  • Calculate Pelvic Incidence (PI)
  • Calculate Pelvic Tilt (PT)
  • Calculate Sacral Slope (SS)
  • Aid in spine problem analysis
Features
Read full description

SagittalMeter is an educative app to easily measure sagittal balance parameters, by directly placing your phone on the sagittal X-Rays. The sagittal balance is an imperative factor to take into consideration for all practitioners treating spine problems and particularly for surgeons during the pre-operative phase. The compensatory mechanisms of a sagittal unbalanced spine may prevent a successful surgery outcome. A fundamental understanding of a correct sagittal alignment is strongly recommended in determining the correct use of fusion or non fusion devices. SagittalMeter enables you to measure 3 fundamental angles which are essential to analyze sagittal alignment: • Pelvic incidence (PI) • Pelvic tilt (PT) • Sacral slope (SS)

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

SagittalMeter Lite4 screens
Primal's 3D Spine4 screens

Verdict

The call

The clearest difference is review sentiment: SagittalMeter Lite at 100% against Primal's 3D Spine's 0%. SagittalMeter Lite also leads on rating (5.0 vs 1.0) and in-app purchases (none vs 1). Primal's 3D Spine's advantage is update cadence (every 6 weeks vs every 11 months). 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. SagittalMeter Lite asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

SagittalMeter Lite holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews point the same way: 100% of SagittalMeter Lite's written reviews are positive against 0% of Primal's 3D Spine's.

UpkeepUpdate frequency

SagittalMeter Lite ships an update every 11 months, Primal's 3D Spine every 6 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard4 real differences · 6 level
SagittalMeter Lite versus Primal's 3D Spine: the parameters behind the verdict, then further details
ParameterSagittalMeter LitePrimal's 3D Spine
PriceFreeFree
Rating5.0 (1 ratings) — better1.0 (1 ratings)
Positive reviews100.0% of reviews — better0.0% of reviews
Number of ratings11
Update frequencyEvery 11 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.015.0
Further details — not scored
Size32 MB158 MB
Age rating12+12+
DeveloperJean-Charles LE HUECPharma Intelligence UK Ltd

Customer experience

SagittalMeter Lite

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
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

SagittalMeter Lite

No in-app purchases

1 purchases

Primal's 3D Spine

One-time1
  • Primal's 3D Spine$39.99

Questions

Is SagittalMeter Lite free?
SagittalMeter Lite 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, SagittalMeter Lite or Primal's 3D Spine?
SagittalMeter Lite is rated higher. SagittalMeter Lite averages 5.0 out of 5 from 1 ratings, while Primal's 3D Spine averages 1.0 from 1 ratings.
Do SagittalMeter Lite or Primal's 3D Spine have ads?
Neither SagittalMeter Lite nor Primal's 3D Spine shows ads.
Which is updated more often, SagittalMeter Lite or Primal's 3D Spine?
SagittalMeter Lite ships an update every 11 months, and Primal's 3D Spine every 6 weeks. Most recently, SagittalMeter Lite was updated on October 24, 2026 and Primal's 3D Spine on October 25, 2026.

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