Opproa Tech Studio

1 Mac app on Kitsmith

Opproa Tech Studio’s own site describes a team of "15 highly skilled software developers" rather than naming an individual maker — no personal name surfaces anywhere in the studio’s own materials.

website

OnlyOne X

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

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.

Utilities Screen Mac App Store Verified August 28, 2026

260 apps, every one checked by hand against the developer's own site or the Mac App Store — prices, requirements, and claims verified at the source.

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