Privacy Policy
This site does not send or store the numbers you enter. There are no accounts, ads or tracking tags.
Each app
- Three-Rod Depth Practice：On-device only. No upload of inputs or history. No network (no ads or analytics). Details
- Doujin Print Profit：Calc data stays on device. No input upload. Free tier may load non-personalized ads. Details
- Booth Break-even：Calc data stays on device. No input upload. Free tier may load non-personalized AdMob ads (UMP consent where required). Ad-free is a one-time purchase. Details
- Handmade Profit Fee Calculator：Your numbers are calculated on your device and never sent anywhere (the web version does not store them). The app stores them only on your device. The free app connects to the internet to show non-personalized ads; the ad-free version shows none. Details
Ads in the apps
The free versions of some apps show a banner ad using Google AdMob. To show ads, AdMob may receive device information such as the advertising ID, IP address and device type. We request non-personalized ads only. The numbers you enter are never sent for ads. Buying the ad-free version removes the ads. See https://policies.google.com/technologies/partner-sites for how Google uses data.
Purchases
Payments for the Pro version are processed by Apple (App Store) or Google (Google Play). We never receive your card or other payment details.
Contact
Operated by MIYUKI, Y.K. (Miyuki Co., Ltd., Nagahama, Shiga, Japan)
Effective: November 1, 2026