Privacy Policy

Last updated: 15 November 2026

This policy covers the iPhone app Kotoakari (also shown as ことあかり, 코토아카리, 言燈日記 and 言灯日记).

What you write stays yours

• Everything you write (answers, notes, good things, the Later Box) is stored only on your iPhone.
• If you turn on Sync with iCloud, it is also stored in your own private iCloud. We can't read it.
• We have no server that keeps your writing. No AI reads it.

What is sent, anonymously

Two kinds of anonymous data are sent. Neither ever includes what you write.

• Worry stats: when you close a Quiet Note, the options you tapped (the kind of worry, the situation, your feelings), what your days are like, and the date. No time and nothing that identifies your device.
• Usage stats: the screens you open, the buttons you tap, the numbers of the questions you answer and a rough length of your answer (a range, never the text), the choices you make when setting up the app, and the app version, language and region. They come with a random ID made for this install. It changes if you reinstall the app and is not linked to your name, your Apple Account or an advertising ID. Usage stats are deleted after about 400 days.

We use them only to make better questions and to improve the app. You can turn both off at any time in the app: Me → Settings. When you turn usage stats off, anything not yet sent is discarded too.

Purchases

Premium is bought through Apple. An external subscription service checks your purchase using an anonymous ID. We never see your name or payment details.

What we don't do

• No ads, no account, no sign-in.
• We don't track you across other apps or websites, and we don't sell any data.
• The Face ID lock is handled by your iPhone. Your face data never reaches the app.

Deleting your data

In the app, open Me → Settings → Erase everything. This deletes everything on this iPhone, what's in your iCloud (if sync is on) and your anonymous usage ID. Stats already sent can't be deleted, because they can't be traced back to you. Deleting the app removes what's on this iPhone, but not what's in your iCloud.

Changes and contact

If this policy changes, we will update this page. Questions: support@kurashinodougubako.com