dialup - International calling

Introducing Dialup – Affordable Global Calling TL;DR Global calling with seamless signup & magic-link login. Real-time credit tracking + auto-deduct after call. Front-to-back features in just one weekend: from blocked numbers & rate calculations to a custom UI with fun dialer sounds and a slick user experience. The Genesis I wanted to build an app that lets people call anywhere in the world without complexity or hidden fees. By the end of a single weekend, it went from zero lines of code to a fully functioning MVP featuring: User Authentication: Simple email-based magic link signup & login (no passwords!). Username availability checks and real-time validation. Credits & Billing: Stripe Checkout for easy top-ups, with a friendly UI for preset or custom amounts. Auto-credit after a successful payment, handled by a serverless webhook endpoint. Per-minute call rates, with a minimal margin for us, and a minimum call cost to avoid abuse. Twilio Voice: Dynamic token generation for client calls. Real-time Twilio callbacks to track call duration + cost, auto-deducting from a user’s balance. Blocking of premium-rate and suspicious numbers (we want legit calls only!). Global Dialer UI: Retro-themed keypad with audio “DTMF” tones and a mini audio analyzer (visual waves!). Real-time contact management (add by username, see in-app). Responsive design with a neat mobile experience. Still to do: - subscriptions - incoming/outgoing numbers - user to user calls - bit more faq/details - more countries - calls will only get cheaper as we dial (😆) things in