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Catch bugs and see who uses your app

“Is my app broken right now? Is anyone using it?”

Error tracking and product analytics. Add both on day one — they cost nothing at small scale.

Tools for this

#1 · Our pick

Best for: Error tracking

Tells you when your app throws an error, with the stack trace and the user's steps. Install it before launch.

Best for: All-in-one product analytics

Product analytics, session replay, feature flags and A/B tests in one tool, with a big free tier.

Best for: Simple privacy-first stats

Simple, privacy-friendly page analytics with no cookie banner needed.