You're the organizer. The players are loaded: pick a style of play, tap Generate, and see the schedule in a second. Publish puts it on the players' page.
Organizer
Enter your registrants (or upload a roster), set your variables, and generate a balanced doubles schedule: similar-level players face off each round, and no two people are ever teammates twice. Download the result as Excel.
Upload a spreadsheet, or type the registrants straight into the browser.
Pick one to get started. You can mix the two: upload a file and still add walk-ups by hand, or the other way round.
Mexicano only. Its rounds are drawn from the standings, so round 1 does not exist until round 1 has been scored. Every other draw style is complete the moment it is published.
Take the complete record of a mixer away as a folder of files, and take down anything members have posted to it.
The zip holds an Excel workbook of every round and score, the leaderboards as CSV, the chat as plain text, every photo as an ordinary JPEG, and a raw JSON copy. It opens without this app, which is the point of keeping it.
File a tournament here once it is over and every score is in. It then appears on /results, which is the page to link from the club website. Archiving also stops an event expiring, so the leaderboard stays readable for good.