# Spine vs SagittalMeter Lite

The clearest difference is in-app purchases: SagittalMeter Lite at none against Spine's 1. SagittalMeter Lite also leads on review sentiment (100% vs 75%) and update cadence (every 11 months vs every 26 months). Spine's advantage is ratings volume (59 vs 1). On price, rating, ads and device support there is nothing between them.

Both are free to download. Spine sells 1 in-app purchase, starting at $1.99 per year. SagittalMeter Lite asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.9 for Spine against 5.0 for SagittalMeter Lite. That said, the two scores are not equally well evidenced: Spine has 59 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 75% of Spine's written reviews are positive against 100% of SagittalMeter Lite's.

Spine ships an update every 26 months, SagittalMeter Lite every 11 months. Both last shipped on November 6, 2026.

## The numbers

| Metric | Spine | SagittalMeter Lite |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (59 ratings)](https://appshunter.io/ios/app/spine-whats-the-data/id934859379/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sagittalmeter-lite/id963720300/reviews)** |
| Number of ratings | **59** | 1 |
| Positive reviews | 75.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 26 months | **Every 11 months** |
| Monetization | Subscription | **Free** |
| Size | 20 MB | 32 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 12+ | 12+ |
| Developer | [Limbix LLC](https://appshunter.io/developer/490505327) | [Jean-Charles LE HUEC](https://appshunter.io/developer/1880028964) |

## What reviewers say

### Spine

[App page](https://appshunter.io/ios/app/spine-whats-the-data/id934859379)

Access essential medical literature and randomized trials in an easy-to-read format. This subscription-based service provides immediate access to updated content, helping medical professionals and students quickly review key studies and enhance their knowledge.

**Highlights:** Review seminal studies quickly, Server-based platform for immediate updates, Annual subscription service, Covers surgical and non-surgical management, Citation information for further study, Updated every 1-3 months

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Annual Subscription | $1.99 | per year |


### SagittalMeter Lite

[App page](https://appshunter.io/ios/app/sagittalmeter-lite/id963720300)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Spine free?

Spine is free to download, with in-app purchases available.

### Is SagittalMeter Lite free?

SagittalMeter Lite is free to download, with no in-app purchases.

### Which has better reviews, Spine or SagittalMeter Lite?

SagittalMeter Lite is rated higher. Spine averages 4.9 out of 5 from 59 ratings, while SagittalMeter Lite averages 5.0 from 1 ratings.

### Do Spine or SagittalMeter Lite have ads?

Neither Spine nor SagittalMeter Lite shows ads.

### Which is updated more often, Spine or SagittalMeter Lite?

Spine ships an update every 26 months, and SagittalMeter Lite every 11 months. Most recently, Spine was updated on November 6, 2026 and SagittalMeter Lite on November 6, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*