Free tool
How much is that UX bug costing you?
Adjust your funnel numbers to see the monthly revenue impact of a UX issue sitting in your app right now.
UX issue severity
Revenue lost per month
750 lost conversions × $29/conversion
Annual impact
$261.0K
Lost conversions/mo
750
You could run 20,077 TestFi campaigns for the cost of this bug going undetected for a year.
A single $13 campaign catches issues like this before they reach your users.
Moderate issue
Assumes 15% of MAU encounter this issue and fail to convert. Real user testing finds issues like these before they compound.
From $1.99 per tester · No subscription
This calculator
Estimates the revenue impact of a UX issue based on your funnel.
Real user testing
Actual testers find the bugs — ones you can't see because you built it.
$13 to get started
2 testers, screen recordings, AI-scored reports. Before the App Store.
How the calculation works
What does "severity" mean here?
Severity is the percentage of your MAU who encounter the issue and fail to convert because of it. A broken "Send Feedback" button (critical) might affect 40% of users who try to contact you. A slightly confusing signup flow (minor) might lose only 5%.
Is this calculation accurate?
It's a directional estimate. The goal isn't precision, it's to make the invisible cost visible. A real user test gives you actual issues with actual reproduction steps.
What does a TestFi campaign actually find?
Real testers record their screen and voice while using your app. They find broken links, confusing flows, inconsistent behavior, and things you can't see because you built the product. AI scores every session before payout.
How much does it cost to run a test?
From $1.99 per tester for written feedback, $3.99 per tester for screen recordings. No subscription, no minimum campaign size.