Answers

One question, one short page, and the answer in the first line. Mostly questions about what other task apps do and do not do, answered from the vendor's own documentation rather than from a forum thread.

• Is there an Apple Reminders app for Windows?No — Apple has never shipped Reminders for Windows, and iCloud for Windows doesn't include it. Here's what actually works, and what to use instead.
• Is there an Apple Reminders app for Android?No, and there never has been. Apple ships no Android apps except Apple Music and TV. Here is the one workaround that exists, and what it costs you.
• Does Things 3 have an API?No public API — Cultured Code say so themselves. What exists instead is four on-device mechanisms, and only two of them can read your tasks back out.
• Does Things 3 have a web app?No — and Cultured Code say so plainly. Things runs on Apple devices only, with no browser access at all. What that means if you work on Windows half the week.