Cal AI’s Co-Founder Shares His App Growth Secrets

How do you go from $9 in your bank account to building and selling a company in just 15 months?In this episode, Jake Castillo, co-founder of Cal AI, breaks down how they built and scaled one of the fastest-growing calorie-tracking apps using speed, influencer marketing, UGC, and relentless execution.Instead of relying primarily on paid ads, Cal AI built a massive distribution engine around 300+ influencers, 20+ TikTok accounts, and a high-volume content strategy, eventually leading to the company being acquired by MyFitnessPal.Jake shares what actually worked, including why giving creators more creative freedom can produce better-performing content, how to scale content across multiple accounts, and how Cal AI used App Store optimization to stand out in a crowded category.If you're building a consumer app, startup, or brand, or trying to figure out how to make influencer marketing actually work—this episode is packed with practical growth lessons you can apply.You will discover:✅ How Cal AI scaled with 300+ influencers✅ Why speed is becoming a major competitive advantage in the AI era✅ How Cal AI used 20+ TikTok accounts to expand distribution✅ Why letting creators control the content can outperform heavily scripted campaigns✅ How to build a high-volume UGC engine without relying entirely on paid ads✅ The App Store growth strategy that helped Cal AI stand out✅ What Jake learned from taking Cal AI from $9 to acquisition in 15 monthsLearn More:Notes from the operator behind Cal AI:https://operatorsnotebook.beehiiv.com/ 🚀 Need help growing your app?App Masters: https://www.appmasters.comYou can also watch this video here: https://youtube.com/live/_uEoWEQV5O0*********************************************SPONSORSThe app growth playbook is changing fast.AppsFlyer’s State of eCommerce App Marketing Report 2026 breaks down the latest trends, benchmarks, fraud insights, and market-by-market data every app marketer should know before planning Q4.Download it free from the link below: https://bit.ly/4uvoHGM*********************************************Follow us:YouTube: ⁠AppMasters.com/YouTube⁠Instagram: ⁠@App MastersTwitter: ⁠@App MastersTikTok: ⁠@stevepyoung⁠Facebook: ⁠App Masters⁠*********************************************