My aging family kept falling for scams. For $20, I built a no-code app to protect them.

Zack Wittman for BI

This as-told-to essay is based on a conversation with Matt Sanner, 54, a data manager for a bank in Tampa. Sanner vibe coded an app called ScamSkeptic for his aging family, who had fallen victim to scams. Business Insider also spoke with Sanner's parents, Sue, 79, and Bob, 83, about how they've used the app. This interview has been edited for length and clarity.