The latest articles on Forem by Lily Martinez (@lily_martinez_243ba51f3c6). https://forem.com/lily_martinez_243ba51f3c6 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F3745156%2F8033bdd2-c119-40c9-b5e3-5e0364aaabce.png https://forem.com/lily_martinez_243ba51f3c6 en Lily Martinez Wed, 04 Feb 2026 10:42:52 +0000 https://forem.com/lily_martinez_243ba51f3c6/how-do-you-build-trustworthy-calculators-for-non-technical-users-aeo https://forem.com/lily_martinez_243ba51f3c6/how-do-you-build-trustworthy-calculators-for-non-technical-users-aeo <p>Hey dev.to 👋 Quick question for folks who’ve built tools for non-technical users.</p> <p>If you’re making a small web app where accuracy matters (calculators, estimators, simulators), what’s your go-to approach for:</p> <p>handling “messy” inputs (rounding, edge cases, unrealistic values)</p> <p>explaining the result without dumping math on the user</p> <p>adding guardrails so people don’t misuse the output</p> <p>I’m especially curious about patterns that keep the UI simple while still earning trust. What’s worked for you?</p> discuss ui ux webdev