# SagittalMeter Lite vs NeckShaftAngle App

The clearest difference is price: SagittalMeter Lite at Free against NeckShaftAngle App's $3.99. SagittalMeter Lite also leads on iOS requirement (12.2 vs 17.0). NeckShaftAngle App's advantage is update cadence (every 11 months vs every 31 months). On ads, in-app purchases and device support there is nothing between them.

SagittalMeter Lite is free to download; NeckShaftAngle App costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SagittalMeter Lite ships an update every 31 months, NeckShaftAngle App every 11 months. The most recent releases landed on October 5, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | SagittalMeter Lite | NeckShaftAngle App |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/sagittalmeter-lite/id963720300/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 31 months | **Every 11 months** |
| Monetization | Free | — |
| Size | 36 MB | 1 MB |
| Requires iOS | **12.2** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 12+ | 17+ |
| Developer | [Jean-Charles LE HUEC](https://appshunter.io/developer/1880028964) | [ORTHOPRACTIS.COM SINGLE MEMBER P.C.](https://appshunter.io/developer/1286360877) |

## What reviewers say

### 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


### NeckShaftAngle App

[App page](https://appshunter.io/ios/app/neckshaftangle-app/id1286360878)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SagittalMeter Lite free?

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

### Is NeckShaftAngle App free?

NeckShaftAngle App costs $3.99, with no in-app purchases.

### Do SagittalMeter Lite or NeckShaftAngle App have ads?

Neither SagittalMeter Lite nor NeckShaftAngle App shows ads.

### Which is updated more often, SagittalMeter Lite or NeckShaftAngle App?

SagittalMeter Lite ships an update every 31 months, and NeckShaftAngle App every 11 months. Most recently, SagittalMeter Lite was updated on October 5, 2026 and NeckShaftAngle App on September 20, 2026.

---

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