Propose a few days, share one link, everyone says whether they can make it. The best date rises to the top on its own. Nobody makes an account, and that includes you.
I wanted to go for a bike ride with friends. A few possible weekends, a group chat going round in circles, and still no date anyone had actually agreed to. I wanted the date sorted in a minute, without everyone signing up for something.
So I looked at what already exists. Fifteen scheduling tools, tried by hand. As a business it doesn't add up: six of them are free, three are open source, and the one with eight million dollars behind it decided not to charge anyone at all. I handed the findings to two AI models separately, neither seeing the other's answer, and both told me not to build the consumer version.
They were right about the business. I still wanted the bike ride sorted. So I dropped the company and kept the tool.
That turned out to be the useful half. Most of what annoyed me about the alternatives came from them needing to be a business. Take the business away and the annoyances go with it.
Nothing you didn't type. The database holds the event title, the dates, the first names people enter themselves, and the votes. No email addresses, no IP addresses, no accounts, because there are no accounts to have.
The page also loads nothing from anyone else's server. The fonts and the one script it needs come from this domain, so opening an invite doesn't tell anyone but me that you opened it.
No time zones. This is for arranging a beer in one city, not a call with California. It doesn't connect to your calendar, on purpose, because that would mean asking you for your calendar. There's no app.
If you want something that reads your real availability from your calendar, use Timeful - free, open source, and it does exactly that. If you need time zones or want to run it yourself, use Rallly. I'm not trying to beat either of them. This one is smaller on purpose.