A solo-built real-time bus/train tracker covering 160+ cities, downloaded 5.2M times, grown to $30K/mo in subscriptions on free App Store keyword optimization (ASO) alone.
Fewer bars = easier, cheaper, or faster for an AI-assisted solo builder. Editorial judgments based on the case details.
Mumigo is a real-time bus and train tracking app covering 160+ cities. It launched in 2017, built entirely by one person — Scottish designer John Makavoy — who started with zero development experience. He reports 5.2M cumulative downloads, 400K monthly actives, 75K ratings, and roughly $30K/mo in revenue, almost all of it subscriptions.
4 more sections — the full story, the playbook, the risks, and the numbers. Free account unlocks everything.
Create free accountEmail code only. No password.The quick-reference card — acquisition channels, replication playbook, and risk map — unlocks with a free account.
Create free accountEmail code only. No password.Paste into Claude Code / Codex and get a working version of this product end-to-end.
Two production-grade prompts per idea: a full build spec and an SEO growth plan. Copy, paste, ship.
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Create free accountEmail code only. No password.Data credibility: Numbers self-reported by founder John Makavoy in a Starter Story interview: $30K MRR, 5.2M downloads, 400K MAU, 75K ratings — not independently verified ⚠️. All revenue figures are founder-reported or estimated by the video's creator, unaudited.