Hoshimiru
Privacy Policy
Developer: Hoshimono Design (https://hoshimonodesign.com) Last updated: 2026-11-08
How data is handled
- Except when you yourself send feedback through the “Feedback and bug reports” feature described below, Hoshimiru makes no external communication. It only calculates, on your device, the prices, shipping, points and product names shown on Amazon search result pages and product pages.
- Your browsing history, personal information and purchase information are not sent anywhere. We do not operate our own server.
- Settings and the comparison data of your last search (product ID, product name and amount; no longer used after 6 hours) are stored only on your device (chrome.storage.local). They are not synced to your Google account.
- No ads, no analytics tags and no affiliate IDs are used.
Feedback and bug reports
- A Google Form opens only when you press “Feedback and bug reports” in the popup. The form is pre-filled with the Hoshimiru version and the Amazon search words you had open.
- You can review and delete what is entered on the form, and you decide whether to submit it. Nothing is sent unless you submit.
- Submitted content is received by Hoshimono Design through Google Forms (Google LLC) and is used only to improve Hoshimiru.
Permissions
storage: to store settings and comparison data on your device- It runs only on search result pages and product pages of amazon.co.jp (it does not run on any other site).
Disclaimer
The quantity is read automatically from the product title, so it can be wrong. We do not guarantee that the ingredient amounts or quantities of products are equivalent.
Even if the brief is still fuzzy, you can start with a free consultation
Share your current situation briefly and we'll come back with a way forward and a rough cost range.
- First consultation free
- Reply within 2 business days
- Online across Japan (in Japanese)
- Multilingual support by email & chat