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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.

A shorter sibling of Find your planner. Three quick taps and a single bundle comes back. 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.