# PotsiApp vs Orthopedic Angles Calculator

The clearest difference is price: PotsiApp at $3.99 against Orthopedic Angles Calculator's $9.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

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

PotsiApp ships an update every 20 months, Orthopedic Angles Calculator every 13 months. The most recent releases landed on November 11, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | PotsiApp | Orthopedic Angles Calculator |
| --- | --- | --- |
| Price | **$3.99** | $9.99 |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/potsiapp/id1451461437/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 13 months** |
| Monetization | Paid | — |
| Size | 1 MB | 4 MB |
| Requires iOS | 15.4 | **14.0** |
| Devices | iPhone, iPad, iPod, Mac | iPhone, iPad, iPod, Mac |
| Age rating | 17+ | 12+ |
| Developer | [ORTHOPRACTIS.COM SINGLE MEMBER P.C.](https://appshunter.io/developer/1286360877) | [Ahmad Al Hariri](https://appshunter.io/developer/1648019898) |

## What reviewers say

### 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


### Orthopedic Angles Calculator

[App page](https://appshunter.io/ios/app/orthopedic-angles-calculator/id6743616080)

**In-app purchases:** none


## Frequently asked questions

### Is PotsiApp free?

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

### Is Orthopedic Angles Calculator free?

Orthopedic Angles Calculator costs $9.99, with no in-app purchases.

### Do PotsiApp or Orthopedic Angles Calculator have ads?

Neither PotsiApp nor Orthopedic Angles Calculator shows ads.

### Which is updated more often, PotsiApp or Orthopedic Angles Calculator?

PotsiApp ships an update every 20 months, and Orthopedic Angles Calculator every 13 months. Most recently, PotsiApp was updated on November 11, 2026 and Orthopedic Angles Calculator 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.*