# FitmentStudio vs Duality

The clearest difference is in-app purchases: FitmentStudio at none against Duality's 7. Duality's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 4 months). On price, review sentiment, device support and iOS requirement there is nothing between them.

Both are free to download. Duality sells 7 in-app purchases, starting at $5.99 per month. FitmentStudio asks for nothing beyond the download.

FitmentStudio ships an update every 4 months, Duality every 3 weeks. The most recent releases landed on October 24, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | FitmentStudio | Duality |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.7 (3 ratings)](https://appshunter.io/ios/app/duality-vpn-and-proxy/id6752567973/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | **Ad-supported** | Freemium |
| Size | 10 MB | 127 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Bartosz Wieloch](https://appshunter.io/developer/1644127426) | [Fundamental Projects S.L.R.](https://appshunter.io/developer/1839922716) |

## What reviewers say

### FitmentStudio

[App page](https://appshunter.io/ios/app/fitmentstudio/id1667288116)

This app helps you find the perfect wheel size for your vehicle, including camber adjustments. Browse and upload community-shared fitment details with images, and discover automotive sponsors for your build.

**Highlights:** Fitment calculator with camber adjustment, Community-powered fitment gallery, Upload wheel and car specs, Discover automotive sponsors, View vehicle build images

**Features:** macOS Compatibility

**In-app purchases:** none


### Duality

[App page](https://appshunter.io/ios/app/duality-vpn-and-proxy/id6752567973)

Secure your internet connection with a VPN that offers split tunneling and custom routing. Protect your data on public Wi-Fi, work remotely with peace of mind, and enjoy fast, private browsing. Choose which apps and websites use the VPN for optimized speeds.

**Highlights:** Free VPN with one-tap connection, Kill switch with DNS leak protection, Split tunneling for selective traffic routing, GeoIP routing for optimized connections (Premium), Strict no-logs policy, Unlimited speed, no throttling, Local network access while connected

**Features:** Vision Pro support

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Basic subscription | $5.99 | per month |
| Premium for 1 month | $8.99 | per month |
| Basic yearly subscription | $23.99 | per year |
| Premium for 1 year | $36.99 | per year |
| Bandwidth of 15GB | $1.99 | one-time |
| Package of 70GB | $3.99 | one-time |
| Package of 150GB | $8.99 | one-time |


## Frequently asked questions

### Is FitmentStudio free?

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

### Is Duality free?

Duality is free to download, with in-app purchases available.

### Do FitmentStudio or Duality have ads?

FitmentStudio shows ads; Duality does not.

### Which is updated more often, FitmentStudio or Duality?

FitmentStudio ships an update every 4 months, and Duality every 3 weeks. Most recently, FitmentStudio was updated on October 24, 2026 and Duality on October 26, 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.*