# BackSCNR vs Gnathic

The clearest difference is update cadence: BackSCNR at every 2 months against Gnathic's every 6 months. Gnathic's advantage is iOS requirement (12.0 vs 15.4). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

BackSCNR ships an update every 2 months, Gnathic every 6 months. The most recent releases landed on September 23, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | BackSCNR | Gnathic |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/backscnr/id1629230768/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 6 months |
| Monetization | Free | — |
| Size | 42 MB | 43 MB |
| Requires iOS | 15.4 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [BackSCNR Inc.](https://appshunter.io/developer/1629230770) | [David A. Tesini DMD and ASSOC, LLC](https://appshunter.io/developer/1166925511) |

## What reviewers say

### BackSCNR

[App page](https://appshunter.io/ios/app/backscnr/id1629230768)

This radiation-free tool uses surface topography to screen and monitor scoliosis in adolescents. It captures 3D torso scans, analyzes asymmetries, and estimates curve angles to support clinical decision-making.

**Highlights:** Radiation-free scoliosis screening, 3D torso capture with TrueDepth or Structure Sensor, Asymmetry analysis and curve angle estimation, Supports clinical decision-making, Rapid analysis via secure web platform

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

**In-app purchases:** none


### Gnathic

[App page](https://appshunter.io/ios/app/gnathic/id6475725359)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BackSCNR free?

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

### Is Gnathic free?

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

### Do BackSCNR or Gnathic have ads?

Neither BackSCNR nor Gnathic shows ads.

### Which is updated more often, BackSCNR or Gnathic?

BackSCNR ships an update every 2 months, and Gnathic every 6 months. Most recently, BackSCNR was updated on September 23, 2026 and Gnathic on September 14, 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.*