Suikō

The notebook is free.
The editor is $9.

Writing every day is the habit, so it’s never paywalled. Suikō charges for exactly one thing: the editor’s attention, the marks and the verdicts and the memory of what you keep getting wrong.

Notebook

The daily practice, free forever.

$0/ month

  • One authored prompt every day, with grammar patterns to reach for, at least one of them N1
  • The ruled editor, built for Japanese IME from the first line
  • Your archive, bound by month: searchable, exportable, yours forever
  • Streaks and completion history that count finished pages, not app opens
  • Three rounds of correction included, to spend on one entry or three
Start writing free

Suikō

The editor, every day.

$9/ month

  • Unlimited rounds of correction: every problem anchored to your words, with the exact expression to consider
  • Round-over-round verdicts: did each fix actually land, or is it still there?
  • A rubric, level estimate, and a verdict that tells you when to stop revising
  • Cloze cards from your corrections, exported as a real .apkg for Anki
  • A native version of each entry, revealed after you finish rather than instead
Write your first page

Starts free: three rounds of correction before you decide.

Fair questions

What exactly is a round?
One full read of your current draft: every problem anchored to your own words with the exact expression to consider, verdicts on whether last round’s problems got fixed, a rubric, and a level estimate. One entry pushed to “finished” typically takes two or three.
Do the free rounds expire?
No. Use all three on one stubborn entry tonight, or one a week for three weeks. They’re yours until you spend them.
Can I bring my own AI?
Yes, on any plan, including free. Copy the built prompt into whatever model you already pay for, paste its reply back, and Suikō renders it like any other round: anchored, tracked, exportable. Imported rounds don’t count against anything. We charge for convenience and memory, not for access.
What happens to my writing if I cancel?
Writing stays free, and the archive stays yours: readable, searchable, and exportable, along with every card you ever made. Your writing isn’t a hostage.
Who can read my entries?
You. There’s no feed, no followers, no sharing by default. This is a private notebook with an editor, not a social network.
Write your first page