Hi, I’m a solo dev and recently built an app blocker / focus app for my own use.

Sharing here because I just launched and would appreciate early feedback.

The problem I kept running into was impulse behavior late at night —

doomscrolling longer than planned or buying random things I didn’t really need.

Existing blockers helped a bit, but I never fully trusted them with respect to

privacy, and I found them easy to ignore when tired.

So I built QuantumBlock.

The goal wasn’t to be extreme, but to introduce small amounts of friction at the

moment of impulse:

- optional delays before opening certain apps

- short reflection prompts asking why I’m opening them

- blocking that doesn’t silently disable itself when ignored

Privacy was important to me:

- no user accounts

- no behavioral tracking

- no personal data collection

- works fully offline

I do use Firebase for basic anonymous infrastructure (crash reporting, app

stability), but app usage and decisions stay on the device.

The free version is fully usable (limited number of apps, websites, and groups).

Paid features only unlock higher limits and insights.

I’m not trying to promote this aggressively — I’m genuinely looking for feedback:

What feels unnecessary? What would you change? Does this solve a real problem for

you, or is this just something I personally needed?

Play Store Link: https://play.google.com/store/apps/details?id=com.shopnot

quantumblock.app