Holdup

A personal nudge engine — shows custom reminders when you visit configured sites

Holdup is a personal nudge engine for your browser. You set reminders for sites you want to think twice about visiting. When you navigate there, Holdup interrupts with your own message. You write the nudge. You decide what it says. How it works: 1. Add a domain + your message + choose a mode (overlay or fullscreen) 2. Navigate to that domain 3. Holdup shows your reminder 4. Choose: go back, continue, get reminded later, or redirect somewhere else Features: • Overlay mode — semi-transparent card on top of the page • Fullscreen mode — redirect to a dedicated interstitial page • Flexible cooldown — always ask, until browser restart, or custom duration • Redirect URL — send yourself to a better site instead • Dark/light mode — follows your system preference or set manually • No data collection — everything stays local in your browser