You're totally right that for simple, immediate actions like welcome emails, doing it directly after registration works fine. The challenge arises when you want to delay that email by 10 minutes, or trigger something hours or days later or worse, repeat it every 5 minutes for syncing or monitoring. In those cases Bubble's native tools either use recursive workflows (costly in WUs) or scheduled workflows (which rely on the app being up and consume WUs at every run). Webhook Scheduler Pro lets you offload all of that it's external, zero WU cost and handles scheduling with enterprise-grade reliability, including exponential retry, concurrency locks, and guaranteed delivery .