# SagittalMeter Pro vs PotsiApp

The clearest difference is price: PotsiApp at $3.99 against SagittalMeter Pro's $9.99. PotsiApp also leads on device support (4 vs 2). SagittalMeter Pro's advantage is iOS requirement (12.2 vs 15.4). On rating, ratings volume, update cadence and ads there is nothing between them.

SagittalMeter Pro costs $9.99 and PotsiApp $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 3.0 for SagittalMeter Pro against 3.0 for PotsiApp. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

SagittalMeter Pro ships an update every 30 months, PotsiApp every 20 months. The most recent releases landed on September 22, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | SagittalMeter Pro | PotsiApp |
| --- | --- | --- |
| Price | $9.99 | **$3.99** |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/sagittalmeter-pro/id964135293/reviews) | [3.0 (1 ratings)](https://appshunter.io/ios/app/potsiapp/id1451461437/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 30 months | **Every 20 months** |
| Monetization | Paid | Paid |
| Size | 36 MB | 1 MB |
| Requires iOS | **12.2** | 15.4 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, 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 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


### PotsiApp

[App page](https://appshunter.io/ios/app/potsiapp/id1451461437)

This medical app assists orthopedic surgeons in evaluating spinal deformities by calculating the Posterior Trunk Symmetry Index (POTSI). It uses a non-invasive topographic method with simple back images to assess back symmetry, helping to identify potential scoliosis and monitor deformities objectively.

**Highlights:** Calculates Posterior Trunk Symmetry Index (POTSI), Evaluates back symmetry using topographic method, Non-invasive assessment of spinal deformity, Imports medical images from camera or photos, Marks anatomical points on patient's back, Saves planned images for review, Objective monitoring of spine deformities

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SagittalMeter Pro free?

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

### Is PotsiApp free?

PotsiApp costs $3.99, with no in-app purchases.

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

SagittalMeter Pro and PotsiApp are both rated 3.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do SagittalMeter Pro or PotsiApp have ads?

Neither SagittalMeter Pro nor PotsiApp shows ads.

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

SagittalMeter Pro ships an update every 30 months, and PotsiApp every 20 months. Most recently, SagittalMeter Pro was updated on September 22, 2026 and PotsiApp on September 20, 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.*