Privacy Policy

Nuka Diary (iOS) / Last updated October 2, 2026

This is an English translation of the Japanese privacy policy. If the two differ, the Japanese version prevails.

This policy explains how Nuka Diary ("the app") handles your personal information.

1. Where your records live

Your care records, photos, pickling history and other entries are stored on your device. The developer never views any of it.

If you turn on iCloud sync, your records sync through Apple's iCloud within your own Apple Account only. Photos are not synced and are stored only on the device.

2. Advertising

The app shows ads through Google AdMob so it can stay free. To deliver ads and measure how they perform, AdMob may collect information such as:

your advertising identifier (IDFA) — only if you allow it
device type, OS version, and approximate region
how often ads were shown or tapped

On the App Store product page, these are declared under "App Privacy" as follows. The party that collects and uses this data is Google, not the developer.

Data	Purpose	Used for tracking
Device ID	Third-Party Advertising	Yes
Advertising Data	Third-Party Advertising, Analytics	Yes
Product Interaction	Third-Party Advertising, Analytics	No
Performance Data	App Functionality, Analytics	No
Crash Data	App Functionality	No
Coarse Location	App Functionality (getting the weather)	No

"Coarse Location" in the table is used for the weather lookup described in section 4. Your location is never handed to the ad network for advertising. However, the ad SDK may infer a rough region on its own from your IP address when it connects. This is a different path from handing over the coordinates.

"Crash Data" and "Performance Data" are used to diagnose the SDK. Developer-facing analytics tools (Firebase Analytics, Crashlytics, and the like) are not included in this app.

See Google's policy for details, and Google's official documentation for what the SDK collects.

If you don't allow tracking
Even if you choose "Ask App Not to Track" when the tracking prompt appears on the first launch, you can keep using every feature of the app as before. The only difference is that the ads you see will no longer be tailored to your interests.
You can allow or disallow tracking at any time in iPhone Settings → Privacy & Security → Tracking.

3. The ad-free plan (subscription)

If you purchase the ad-free plan, the app does not run the processing for showing ads at all. Payment is handled through Apple's App Store, and the developer never receives your credit card number or other payment details.

4. Location and weather

Location is used only if you turn on "Match today's temperature". It is off by default, and every feature of the app works with it off.

It is used for one thing only: to look up the high and low temperature where you live, so the guides for pickling times and stirring match how hot or cold it is today
Only an approximate location is requested. When it is saved on the device, it is rounded to one decimal place (roughly an 11 km square)
No movement history is stored at all. Only the most recent single point and its temperatures are kept
Weather comes from the public API of the Norwegian Meteorological Institute (MET Norway). Only the latitude and longitude rounded to two decimal places (roughly a 1 km square) are sent, and nothing else, at most once every three hours. Your location is never given to advertising companies
To show a place name (such as "Saitama"), the approximate location is looked up with iOS's built-in place-name lookup (Apple's CLGeocoder). The place name is kept on the device together with the single saved point
Turning the feature off deletes the saved weather and location from the device

You can allow or disallow location access at any time in iPhone Settings → Nuka Diary → Location.

5. Notifications

Stirring reminders and notifications that your pickles are ready to eat are created and shown on your device. They do not pass through any external server.

6. Photos

Photo access is used only when you attach a photo to a record. Photos you take or select are stored on the device and are never sent anywhere.

7. Children

This app is not directed at children under 13.

8. Changes to this policy

If this policy changes, the "last updated" date on this page will be revised.

9. Contact

You can get in touch through GitHub Issues.