Pricing
Castiel pricing
As castiel.dmkilab.com lists them, read 14 Nov 2026. The maker's own page has the final word.
| Plan | Billed and limits | Price |
|---|---|---|
| Linux | Free in full; no session timer. · Linux · every mode · Debian, Flatpak, AppImage, tarball | Free |
| Free tier | No time limit for Simple and School; advanced modes limited to about 30 minutes per session. · Simple and School · paper tape · advanced modes about 30 minutes/session | Free |
| Windows full version | One-time purchase; removes the session limit on advanced modes. · Windows · all modes · editable tape | $2, paid once |
From castiel.dmkilab.com, castiel.dmkilab.com, castiel.dmkilab.com.