How I Coded ANOTHER Profitable App SOLO (step by step / from scratch / with AI)

One Sentence Summary:

A solo founder builds, launches, and earns from a simple YouTube transcript downloader, demonstrating the startup journey.

The creator moved to Malaysia and focused on coding a new, profitable app solo.
The app helps extract bulk YouTube transcripts for AI training and content repurposing.
Recognized a market need due to tedious manual transcript extraction and limited competitors.
Planned the MVP using the SLC framework: simple, lovable, complete, focusing on core value.
Chose a memorable domain and used Tempo to rapidly set up the tech stack in minutes.
Utilized AI tools to generate and refine project requirements, UI, and code efficiently.
The app features a clean UI, simple user flow, and integrates with GitHub for version control.
Launched on platforms like Product Hunt, Reddit, and niche forums, focusing on targeted outreach.
The initial launch resulted in 13 signups, 6 paying customers, and over £200 in revenue.
The creator emphasizes realistic expectations, continuous improvement, and transparent journey sharing.

Focus on solving a specific, real problem with a minimal yet complete product.
Use AI tools to accelerate development, design, and project planning.
Prioritize a simple user experience to maximize value and reduce friction.
Validate market demand through competitor research and early customer feedback.
Document and share the startup process openly to build community and accountability.