# Spine vs SagittalMeter Pro

The clearest difference is price: Spine at Free against SagittalMeter Pro's $9.99. Spine also leads on rating (4.9 vs 3.0) and review sentiment (75% vs 33%). SagittalMeter Pro's advantage is in-app purchases (none vs 1) and update cadence (every 11 months vs every 26 months). On ads, device support and iOS requirement there is nothing between them.

Spine is free to download; SagittalMeter Pro costs $9.99 up front. Spine sells 1 in-app purchase, starting at $1.99 per year. SagittalMeter Pro asks for nothing beyond the download.

Spine holds the better App Store score, 4.9 against 3.0. That said, the two scores are not equally well evidenced: Spine has 59 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 75% of Spine's written reviews are positive against 33% of SagittalMeter Pro's.

Spine ships an update every 26 months, SagittalMeter Pro every 11 months. The most recent releases landed on October 22, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | Spine | SagittalMeter Pro |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[4.9 (59 ratings)](https://appshunter.io/ios/app/spine-whats-the-data/id934859379/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/sagittalmeter-pro/id964135293/reviews) |
| Number of ratings | **59** | 2 |
| Positive reviews | **75.0% of reviews** | 33.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 26 months | **Every 11 months** |
| Monetization | Subscription | **Paid** |
| 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 Pro

[App page](https://appshunter.io/ios/app/sagittalmeter-pro/id964135293)

This app helps medical practitioners measure key parameters of sagittal balance directly from X-ray images using a phone. It aids in analyzing spine alignment for pre-operative planning and surgical outcomes. The tool provides measurements for pelvic incidence, pelvic tilt, sacral slope, and various lumbar and spinal angles.

**Highlights:** Measure sagittal balance parameters, Analyze spine alignment, Pre-operative planning tool, Calculate pelvic incidence, tilt, and sacral slope, Measure lumbar lordosis, Advanced mode for comprehensive 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 Pro free?

SagittalMeter Pro costs $9.99, with no in-app purchases.

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

Spine is rated higher. Spine averages 4.9 out of 5 from 59 ratings, while SagittalMeter Pro averages 3.0 from 2 ratings.

### Do Spine or SagittalMeter Pro have ads?

Neither Spine nor SagittalMeter Pro shows ads.

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

Spine ships an update every 26 months, and SagittalMeter Pro every 11 months. Most recently, Spine was updated on October 22, 2026 and SagittalMeter Pro on November 1, 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.*