The Pass
The Pass removes the Klipa logo from one video and delivers it up to Full HD (1080p), if your original video allows it. Klipa never sells a quality your video cannot give: a small video stays small, and the Pass then only removes the logo. No account is needed.
HD
HD lets you download one video from the downloader in better quality, up to 2160p. No account is needed.
The price
The price of the Pass and of HD is shown on the result screen, when you download. Subscriptions are presented on the pricing page.
If you subscribe later, a video you made is redone without the logo, at your plan's quality. See Plans and prices.