If something is not here, the pricing and changelog pages cover most of the rest.
The core is free forever. Your first 30 days unlock everything, including the Pro tools - no card, and no sign-up to start capturing. After that Clarus keeps working for everything in the Free column and the Pro tools ask you to upgrade when you reach for them. See pricing for the split.
Nothing you have made is touched. Every capture, recording and edit stays on your machine and stays yours. Clarus keeps working for everything in the Free column; only the Pro tools start asking for an upgrade.
Not to capture, annotate or record - none of that touches a server. An account is only needed for cloud sharing and for Pro.
Only if you ask it to. Captures, recordings and OCR all run locally on your PC. Clarus checks for updates, and if you use cloud sharing it uploads the one file you picked — nothing else, and never on its own.
Yes, and it is entirely optional. Send any capture up and you get a short link to share, with an expiry or a password if you want one — and your uploads stay searchable by the text inside them. Clarus never uploads anything by itself.
Windows 10 and 11, 64-bit.
Yes - Clarus replaces the Snipping Tool shortcut, because that is the key people already reach for. If you would rather keep it, Settings → Advanced has a switch that hands it straight back to Windows.
Silently, in the background - you are always on the newest build without being asked. Everything that has shipped is listed in the changelog.
Ten, including right-to-left Arabic. It follows your choice in Settings rather than guessing from the system.
Yes. Uninstalling hands Win+Shift+S back to Windows, clears the cache it downloaded, and leaves your screenshots and recordings exactly where they are - they are your files, in your folders.