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№ 00 · Free tools

Four small calculators for people who plan on e-ink.

Nothing leaves your browser. Nothing’s tracked. If one of these saves you fifteen minutes, we’ve earned a bookmark.

[tool 1: storage]

Will this PDF fit on my device?

Paste a file size, pick your device, see how much room you’ve got left and roughly how many more planners you can add before it’s full.

[tool 2: reading]

Reading goal, translated into real time.

Pick how many books you want to read this year. We’ll show you the weekly pace and roughly how many minutes a day that means, so you can decide whether to keep the goal or halve it.

[tool 3: pick]

Three questions, one recommendation.

Three quick taps and a single bundle comes back. For the one planner that fits your tablet and what you plan, Find your planner goes further. No funnel, no nag.

Device you’ll plan on
Pace you actually keep
What it’s mainly for
Best fit –

See the bundle
[tool 4: habits]

Paste your dates, see the year as a single image.

Drop the dates you marked something done, one per line (any ISO format, like 2026-03-14). You’ll see the year in a 53-week grid, plus longest streak, current streak, and completion rate. Print-ready.

days0
longest streak0
current streak0
of year0%

Tip: hold ⌘/Ctrl+P from the printed page of your planner and feed this the output. One glance tells you the story of the year.

Looking for page sizes rather than storage? The e-ink PDF size database has the exact page dimensions for every device, plus a checker that tells you whether a PDF you already have will fit.

Ideas for a fifth tool? Write us. If it saves us time, we’ll build it.