This is a generator rather than a download library. Nothing here is a file you fetch and fill in; you configure a page and the tool draws every one of them, then writes the whole interior out as a single multi-page document ready to upload.
Ten page layouts are available — ruled lines, dot grid, squared grid, plain, Cornell notes, a monthly calendar, a habit grid, a gratitude page, a task list and a goals worksheet. Around each of those sit the settings that make a book rather than a page: trim size, margins, paper tint, typeface, line weight and colour theme, plus optional running headers and footers and a title page.
The page count runs from ten to five hundred and defaults to a hundred and twenty, which is where the practical decisions start. Length drives both the manufacturing cost and the spine, so a journal is usually designed at the length its economics support rather than at a round number chosen first.
No. This tool draws the interior itself from the settings you choose, rather than distributing files published by anyone else. The layout, the trim size and the margins are yours to set, and equally yours to check before uploading.
It does not. Left and right margins are set once and applied to every page identically, so the inner margin does not alternate as it would in a typeset book. Make both side margins generous enough that the narrower one still clears the binding.
Seven: two common novel proportions, a compact pocket size, two paper standards, a textbook proportion and a large format. If your intended trim is not among them, this is the wrong starting point, because rescaling afterwards changes every margin with it.