I think the best option is to imagine yourself in the place of a potential user and evaluate the experience of using the application as unbiased as possible. If everything satisfies, then it's done!
"Stop thinking, start doing"
Define your MVP and be happy with an acceptable place to launch. Nothing will be perfect right out of the gate and you can fix most things along your path. It's about being agile, getting feedback, and pivoting as needed.
Being "Ready" is too broad. Is it bug free? Is it nice looking? Is it perfect?
The only question that matters: Does it solve someone problem? If yes, you are ready !
Then you can fix bugs and make it visually more appealing if you want
At RedNevada.AI we're onboarding trial customers from relationships and cold outreach to 1st connections on LinkedIn. We're positioning it as a "market test" phase where customers can get the value of the product but we also optimise the product from user feedback so it's bringing in those early users into our journey, building brand advocates and we're being transparent with them about the product roadmap. We're inviting them to input their thoughts on the roadmap so that we're developing our features based on what will bring the most value to customers and being transparent about the pricing for when it converts to a paid model. Not only are we getting crucial user feedback those users are also helping us to create case studies, testimonials etc. for the website and are highly likely to convert into paying customers.
Ask these questions to make sure your product is ready for launch:
1. Is your product meeting the needs of your target market?
2. Is your product technically sound?
3. Is your product well-documented?
4. Is your product priced competitively?
5. Do you have a marketing plan?
6. Are you prepared for launch?
Finding bugs is the easy part. Just QA your product thoroughly and get a few people beta testing it.
The hard part is the quality in my opinion. All the non blocking small improvements that you're not sure whether they'd really make a difference. On one hand you want to be lean and so focus only on the essentials, but on the other hand poor quality can distract from the important feedback you're looking for and great quality can inspire people. I don't think there's a right answer to that, it's a lot of gut feeling. The way I like to think about it: Would I be comfortable walking my manager / an important customer / a prospect we'd love to sign through our product? Would I be able to justify the quality issues by explaining we're trying to be lean?
There's no perfect time to feel 'READY'. My simple rule of thumb is that users are able to do the 1 thing your product provides from 0 to 1, then you're ready.
I would say to make sure the core concepts are 100% ready and fully functional. The entirety of a project, especially the additional features that you'd like to have sometimes prevent the project from getting completed in a timely way. See how the market/user base responds to the overall concept first and you may find out those hypothetical additions weren't to your user base as relevant as you thought.