Home / This developer's life / premium sites in Instant Preview, 9/15/2021 edit
Try Documentalist, my app that offers fast, offline access to 190+ programmer API docs.

Implemented premium sites on https://www.instantpreview.dev
Don't think anyone will use it, but I want that for myself.
Took longer than expected but one day isn't bad.

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Need fast, offline access to 190+ programmer API docs? Try my app Documentalist for Windows