Building Three Privacy-First Mini Apps That Feel Like Standalone Products

Building Three Privacy-First Mini Apps That Feel Like Standalone Products

PureHub is an open-source collection of 22 free, ad-free mini apps. This release focuses on a simple product question: can a mini app inside a hub still feel dependable, focused, and complete?

QR Studio

The web scanner now supports a live camera and uploaded images through local decoding. Scan history stays in local storage, URL results receive basic safety checks, and supported cameras expose a torch control. Android uses CameraX and ML Kit with explicit scanner cleanup, duplicate-result protection, and copy, open, and share actions.

Zen Pomodoro

A one-second decrement loop drifts when a tab sleeps. The new timer stores a target time and recalculates the remaining duration, so switching tabs or waking a device no longer quietly extends a session. Weekly sessions and focused minutes remain on-device. Android uses a monotonic clock for the same reason.

Zen Breath

The breathing guide now includes Calm 4-6, Box 4-4-4-4, and Relax 4-7-8 patterns, controlled sessions, cycle totals, and accessible motion behavior. Nothing requires an account.

Standalone safety for all 22 tools

Each mini app now has a runtime contract describing its local storage namespace, offline behavior, and device capabilities. A per-tool error boundary prevents one failure from taking down the rest of PureHub. The three flagship tools also load as independent chunks and are available as PWA and Android launcher shortcuts.

What happens next

The Command Center will compare 14 days of anonymous aggregate opens, helpful votes, and shares. The strongest useful-use signal – not raw views – will choose the next deep-polish target.

Try the release at PureHub or inspect the source on GitHub.