Is Peak free?
Yes. It's free software under the GPL-3.0 licence, and the source code is on GitHub.
Do I need to own Minecraft?
Yes. Peak signs you in with your Microsoft account and launches the Java Edition you own. It doesn't work around that.
Why does CurseForge content go through api.peaklauncher.com?
CurseForge's API needs a key, and a key shipped inside an app isn't secret for long. So Peak asks a small proxy we run, which adds the key and forwards a fixed list of read-only requests to CurseForge. The proxy doesn't keep a record of what you search for. If you'd rather use your own key, paste it into Settings → Integrations and Peak will talk to CurseForge directly.
Will importing change my other launcher?
No. Peak copies the files it needs and never writes to the other launcher's folders.
Where does Peak keep its files?
%APPDATA%\PeakLauncher on Windows,
~/Library/Application Support/PeakLauncher on macOS and
~/.local/share/PeakLauncher on Linux.
Something's broken. Where do I report it?
Open an issue on GitHub or email support@peaklauncher.com. The instance's Console tab has the log, which helps a lot.