# OnlyOne X

A free, minimalist duplicate-file scanner from a small indie studio — scan and clean for free, with a pro upgrade for one-click smart selection.

- **Category:** [Utilities](https://notchlist.vercel.app/category/utilities/)
- **Price:** Free (Scan & Clean); one-click "Smart check" selection requires upgrading to the pro version — exact Pro price not listed on the developer’s page, check the Mac App Store listing
- **Open source:** no
- **Official site:** https://sites.google.com/view/opproastudios/tools/onlyone-x
- **Available via:** Mac App Store
- **Maker:** Opproa Tech Studio

## Kitsmith's take

The bare-bones option in this section: free scanning and cleaning of duplicate files, with configurable minimum file size and ignored file types. The one-click "Smart check" auto-selection is gated behind a pro upgrade. Its developer presence is thin — a single-page site rather than a full marketing site — but the app itself is a real, current Mac App Store listing, last updated in 2025, not an abandoned or fake entry.

## Features

- **Scan & Clean:** Free duplicate-file scanning and removal across your Mac.
- **Configurable scan settings:** Set a minimum file size to scan, and choose which file types to ignore.
- **Smart check (Pro):** One-click selection of all copy items at once, unlocked by upgrading to the pro version.

## FAQ

**Is OnlyOne X free?**

Scan & Clean is free. The one-click "Smart check" bulk-selection feature requires a pro upgrade, per the developer.

**Who makes OnlyOne X?**

Opproa Tech Studio — the App Store publisher account is listed under the name Kun Liu (坤刘).


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Hand-verified listing on Kitsmith: https://notchlist.vercel.app/apps/onlyone-x/