# ScolioTrack vs Modelix

The clearest difference is price: Modelix at Free against ScolioTrack's $14.99. ScolioTrack's advantage is iOS requirement (12.4 vs 15.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

Modelix is free to download; ScolioTrack costs $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ScolioTrack ships an update every 6 weeks, Modelix every 3 months. The most recent releases landed on October 11, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | ScolioTrack | Modelix |
| --- | --- | --- |
| Price | $14.99 | **Free** |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/scoliotrack/id417954464/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 82.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 3 months |
| Monetization | Paid | — |
| Size | 166 MB | 125 MB |
| Requires iOS | **12.4** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 12+ | 17+ |
| Developer | [Kevin Lau](https://appshunter.io/developer/1327103054) | [TechMed 3D](https://appshunter.io/developer/964196047) |

## What reviewers say

### ScolioTrack

[App page](https://appshunter.io/ios/app/scoliotrack/id417954464)

Safely and affordably track scoliosis progression from your iPhone. This clinically proven app measures spinal curves, monitors height and weight, and records back photos for visual comparison. Ideal for patients, parents, and healthcare professionals.

**Highlights:** Track spinal curve progression, Measure Angle of Trunk Rotation (ATR), Record height and weight, Take and compare back photos, View data in history graphs, Manage multiple user profiles, Access scoliosis news and FAQs

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Modelix

[App page](https://appshunter.io/ios/app/modelix/id1514613581)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ScolioTrack free?

ScolioTrack costs $14.99, with no in-app purchases.

### Is Modelix free?

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

### Do ScolioTrack or Modelix have ads?

Neither ScolioTrack nor Modelix shows ads.

### Which is updated more often, ScolioTrack or Modelix?

ScolioTrack ships an update every 6 weeks, and Modelix every 3 months. Most recently, ScolioTrack was updated on October 11, 2026 and Modelix on October 10, 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.*