Starter Story Build · October 1, 2026
Jake Castillo's UGC Playbook: From the First Creator to 300
Jake Castillo says he would take an app from zero to $10K a month in revenue with UGC alone, without raising much money or spending much on paid ads. He co-founded Cal AI and served as its CMO. Cal AI launched in May 2024, reached 15 million users in under 18 months, and was acquired by MyFitnessPal. Starter Story Build published the interview on 1 October 2026. He splits the system into five steps: find creators, warm up their accounts, pick a content format, check the money, then scale.
- Speaker
- Jake Castillo
- Where
- Starter Story Build
- Published
- Length
- 15 min
Jake Castillo: Co-founder of Cal AI, where he served as CMO.
Recording: I Built A $30M iOS App: This is My Growth Playbook