# PotsiApp vs outSMARTPD

The clearest difference is price: outSMARTPD at Free against PotsiApp's $3.99. outSMARTPD also leads on update cadence (every 2 weeks vs every 20 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

outSMARTPD is free to download; PotsiApp costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PotsiApp ships an update every 20 months, outSMARTPD every 2 weeks. The most recent releases landed on September 20, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | PotsiApp | outSMARTPD |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| 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 2 weeks** |
| Monetization | Paid | — |
| Size | 1 MB | 32 MB |
| Requires iOS | 15.4 | **15.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [ORTHOPRACTIS.COM SINGLE MEMBER P.C.](https://appshunter.io/developer/1286360877) | [outSMARTPD LLC](https://appshunter.io/developer/1594020630) |

## 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


### outSMARTPD

[App page](https://appshunter.io/ios/app/outsmartpd/id6462346736)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is PotsiApp free?

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

### Is outSMARTPD free?

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

### Do PotsiApp or outSMARTPD have ads?

Neither PotsiApp nor outSMARTPD shows ads.

### Which is updated more often, PotsiApp or outSMARTPD?

PotsiApp ships an update every 20 months, and outSMARTPD every 2 weeks. Most recently, PotsiApp was updated on September 20, 2026 and outSMARTPD on September 18, 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.*