1. Information We Collect
Every calculator and tool on trovetool can be used without logging in, and every value you enter into a tool (amounts, rates, text, and so on) is processed entirely inside your own browser and is never transmitted to or stored on our servers.
However, if you use the optional sign-in feature (for saving your calculator settings and syncing them across devices), the following information is collected and stored:
- Your email address — for sending login links and identifying your account
- If you sign in with Google, the basic profile information from your Google account (name, profile image)
- A session cookie that keeps you signed in
- The calculator settings you save (per-tool input defaults)
Authentication and storage of the data above are handled by Supabase. You can use every calculation feature of the site without signing in.
2. Information Collected Automatically
To operate the website, the following information may be collected automatically:
- IP address, browser type, operating system, and access time (Vercel/Cloudflare access logs)
- Traffic statistics such as pages visited and time on page (Google Analytics)
- Aggregate per-tool usage counts — anonymous statistics per tool name that do not identify individuals
- Your preferences — for example, dark mode (browser localStorage)
3. Cookies and localStorage
trovetool uses localStorage and cookies for the following purposes:
- Saving your dark/light mode preference (localStorage)
- Saving your cookie-consent status (localStorage)
- Saving your calculator input defaults (localStorage)
- Keeping you signed in (Supabase authentication cookies — only if you use sign-in)
- Ad serving and personalization (Google AdSense cookies)
- Traffic analysis (Google Analytics cookies)
On your first visit, a cookie-consent banner asks for your agreement. If you decline, the core features of the site still work, although some personalized features may be limited.
4. Google AdSense
This site serves Google AdSense ads to help cover operating costs. The advertising network works as follows:
- Google and its advertising partners use cookies to show ads based on your visits to this and other sites.
- You can opt out of personalized advertising in your Google Ads Settings.
- You can opt out of cookies used by third-party advertising vendors at aboutads.info.
5. Third-Party Services
This site uses the following third-party services:
- Vercel — hosting and static-file delivery
- Vercel Analytics — cookieless visitor statistics (based on IP/UA, no personal identification)
- Cloudflare — DNS and security
- Supabase — sign-in authentication and storage of synced calculator settings (only if you use sign-in)
- jsDelivr — CDN for the Pretendard Korean font
- Google AdSense — ad serving
- Google Analytics — traffic analysis
When you use each service, that service's own privacy policy also applies.
6. Data Retention and Deletion
For users who do not sign in, trovetool stores no personal data on its side. If you sign in, your account information (email, basic profile) and synced calculator settings are retained while your account exists and are deleted without delay upon your request. Logs held by third-party services follow each service's retention policy.
7. Your Rights
If you signed in, you can log out at any time. To delete your account and any saved calculator settings, reach us through the Contact page — we delete them without delay after verification. To remove preferences stored in your browser (localStorage), use your browser's clear-site-data feature. Requests to delete logs held by third-party services must be made through each service's own user policy.
8. Changes
If this policy changes, we update the “Last updated” date at the top of this page. We announce material changes separately through a site notice.
9. Contact
For privacy-related questions, reach us through the Contact page or on GitHub.