Yadaphone

A browser-based voice calling service offers a stripped-down alternative to Skype, letting users make affordable phone calls without downloading software or navigating bloated feature sets. Built as a solo project, the founder focused exclusively on solving one problem — cheap, simple voice calls accessible from any browser. Monetized through a straightforward one-time credit purchase model, the product grew from zero to $15,000 in revenue within its first three months.