Privacy Policy
Last updated: September 26, 2026
WebMemo (app.easymoat.com) and MarketWatch Max are services operated by Easymoat (sole proprietor: Yoshicchi), Japan. This policy explains exactly what data these services handle. The MarketWatch watch app itself has its own policy on the MarketWatch page.
1. What we do NOT collect
- No email address, name, postal address or phone number
- No advertising identifiers, no analytics SDKs, no tracking cookies
- No location data
- No card numbers — MarketWatch purchases are processed entirely by Stripe
2. Your account
Signing in takes your watch's Device ID and a proof that you have the watch: on an updated MarketWatch, the 6-digit Web code shown in the watch's Device ID menu; otherwise your MarketWatch license key. That Device ID is the account. It is a random identifier of the watch, not of you as a person. A web sign-in lasts up to 30 days and ends with your MarketWatch entitlement; Sign out web on the watch ends every web sign-in for that watch at once.
3. What is stored on our server
To sync between your browser and your watch, our server stores, keyed to your Device ID:
- Portfolio contents: tickers, and — only if you choose to enter them — cost basis, quantity and memos
- Portfolio names and display settings (colors, section order, Markets selection and alert threshold)
- Net-worth history derived from the values above
- Watch verification data (only for a watch running an updated MarketWatch): one-way fingerprints of the watch's own identifier and of a secret the watch holds (neither the identifier nor the secret is stored), when the watch was registered or re-registered, whether and when it was frozen because another device claimed the same Device ID, a sign-in version number, the date (not the time) of the watch's most recent connection, and a pending MarketWatch Max link (the owner's Device ID and the Max's, kept for 24 hours). A Max link is approved by the owner in WebMemo.
Entering amounts is optional. Without cost basis or quantity, WebMemo works as a watchlist and no financial amounts of yours exist anywhere on our server.
4. Memo tabs and attachments
Memo tabs are stored on our server so the same notes appear on every device you sign in from. File attachments, when the feature is available, are stored the same way (up to 10 MB per file, with a per-account cap) and are visible only to your account.
5. Market data
Prices come from Yahoo Finance's public API. Requests are made by our server, so Yahoo receives the tickers being looked up but nothing that identifies you — not even your IP address.
6. Server logs
Operational logs record Device IDs and request outcomes for troubleshooting. We also count page views and sign-in attempts per day; these counts keep no identifiers. Portfolio contents are not written to logs.
7. Hosting
Data is stored on Render's cloud infrastructure and encrypted in transit (HTTPS). Servers may be located outside your country.
8. Taking your data out, and deleting it
Nothing is locked in. Export in the header writes all of your portfolios to a single CSV file at any time — the same file can be read back with Import, so you can keep your own copy or move it elsewhere whenever you like. Deleting also removes the watch verification data listed in section 3.
Your data is kept while you use the service. You can erase it yourself at any time: sign in to WebMemo and use Delete all my data at the bottom of the page. This immediately and permanently removes your portfolios, memo tabs, asset classes, net-worth history, display settings and any attachments from our server. Your MarketWatch license is unaffected, so you can sign in again and start over. If you prefer, email your Device ID to easymoat@gmail.com and we will do it for you. Since we hold no email address or name, there is nothing else to erase.
9. Changes
Material changes to this policy will be reflected in the date at the top. Continued use after a change means acceptance.
10. Contact
Questions and requests: easymoat@gmail.com