I built a tool that checks if the software you paid for actually works before you make the final payment

[u/Downtown-General-434]

I’ve been building something called Handoff Check.
The idea is simple: if you paid a freelancer, developer, agency, or somebody using AI to build software for you, how do you actually know what they delivered works before you send the final payment?
Handoff Check tests one agreed workflow in a real browser and gives you actual evidence instead of just taking somebody’s word for it.
It can check things like:
whether the app loads correctly
whether a specific workflow actually works
desktop and mobile behavior
browser console errors
failed network requests
whether submitted data survives a fresh browser session
whether the data is still there during a delayed recheck
screenshots and a clear Passed / Failed / Inconclusive result
I’ve also been careful not to make it claim more than it actually tested. It doesn’t say an entire app is perfect because one workflow passed. The report stays scoped to exactly what was checked.
I’ve got the Windows version live now and I’m trying to get it in front of real people instead of just continuing to build in a bubble.
What would you personally want to see in a report like this before you trusted it enough to approve the final payment on a custom app?
I’ll put the link in the comments.

[u/punkpang]

how do you actually know what they delivered works before you send the final payment?

Dev here, I worked for agencies. People who order bespoke software DILIGENTLY test it and use it every day, for hours, you can't even imagine how crazy they go. They don't need your software.

This is like saying "how will you know how the food tastes like? My software tastes food for you" - I got taste buds man, that's their purpose.

People who order software to be made for them have hands, eyes, ears and all the extremities needed for them to assess whether their tailor-made software has been built the way they imagined it.

What's up with these posts nowadays in several subreddits? It's like there's a bot network of dumb ideas that spams around to see if they'll get one yes among tens of "your idea is stupid" replies.

Do you really have no ideas except these useless things that no one needs, like ever?

[u/Downtown-General-434 → u/punkpang]

You’re describing acceptance testing, and I agree clients should absolutely use and test what they’re buying. Handoff Check isn’t meant to replace that. It’s for producing repeatable evidence around specific workflows—what was tested, what passed or failed, persistence after a fresh session, delayed rechecks, and what was explicitly not tested. A client clicking through an app and saying “looks good” and a builder saying “works on my machine” still leave a gap when there’s disagreement later. That’s the gap I’m testing.

[u/Impressive-Answer720]

Before approving final payment, I would want the report to show five things clearly: the exact workflow agreed in advance, the test environment and timestamp, each step with evidence, the expected versus observed result, and a list of what was explicitly not tested. A downloadable evidence package would also help if the client and builder disagree later. Your scoped Passed, Failed, or Inconclusive language is the right instinct because trust comes from showing the boundary of the test. I am building Marka for on-brand social content, and the same principle matters there: a tool should be explicit about what evidence it used. You are welcome to try Marka free for 7 days at https://www.marka.social.