This ultra-simple app makes $8,500 per month | Starter Story

PDFShift.io is a simple website that converts HTML code into PDF files via an API, and it generates $8,500 per month in revenue. The core of the business is a usage-based pricing model where customers pay per PDF conversion, with a free tier to get started. The founder drives most of his customers by answering niche questions about PDFs on Quora, capturing a highly targeted audience that is already searching for this specific solution. Once a user finds the service through his answers, they may subscribe and become a long-term customer, potentially paying $500 per month.

The Mechanism: A Simple API with Usage-Based Pricing

The product itself is straightforward: PDFShift.io accepts HTML code—like a web page or other digital content—and converts it into a PDF file through an API. The pricing is structured around usage, meaning customers pay based on the number of PDFs they generate. There is a small amount of free usage to allow potential customers to test the service, but once they exceed that threshold, they move into paid tiers. This model is effective because it aligns the cost with the value the customer receives—they only pay when they actually need the conversion.

The Customer Acquisition Strategy: Quora as a Lead Generator