I used AI to code a personal trainer app in one weekend. I see why big apps fear the competition.

Business Insider's Lee Chong Ming built a custom trainer app in a weekend. It replaced multiple tools and made him question why he should pay for big fitness platforms. Lee Chong Ming/Business Insider Business Insider's Lee Chong Ming vibe-coded a custom trainer app in a weekend. It replaced his fitness stack and made him question why he should pay for or use multiple apps. Vibe coding can make personalization easy and fast — and that should worry big apps. As a former group fitness coach, ...