What we keep, and what we do not.

• Your book (what you type into it) is stored on our server so it opens from your link. We never sell it or show it to anyone. Think before writing very sensitive details; the book is only as private as its link.
• The links: we store only a scrambled (hashed) form of each key, so we cannot read your link back or send it to you.
• Cookies: one cookie keeps your book open in this browser, one protects forms. No analytics or advertising cookies.
• Addresses: to enforce daily limits we keep a salted hash of your internet address for up to 3 days. The web server's own access log is kept by the host for a short time.
• Calculators (kit math, power planner) save nothing.
• Deleting: "Delete this book" removes it at once. Books not opened for 400 days are deleted. Backups of the database are made nightly and before and after each software update; backups older than 14 days are deleted.

Advertising

Since 17 October 2026 the public pages (home, kit math, the power planner's example, the call sheet, pricing and about) show one banner ad from AdEngine (adengine.us), the small ad network run by WeldonPC, the company behind Stormbook. For now the ads are for WeldonPC's own services. Your book (and its print and card pages), the power planner once you enter your own devices, terms, this page and error pages never show one.

To show an ad, your browser loads a script from adengine.us, asks it for one banner, loads the banner image, and reports once that the page was viewed and once that the banner was shown. Like any website, adengine.us receives your internet address, your browser type and the address of this site (not of the page you are on, and never anything you typed) with those requests.

• No cookies, no profile. AdEngine sets no cookies, gives you no ID and does not track you from site to site.
• How your internet address is used. adengine.us looks up the approximate city for your internet address in a location database kept on its own server (nothing is sent to anyone else), so that ads meant for one area are shown only there. It also uses the address to count each ad view or click only once and to leave out robots and WeldonPC's own office traffic. The address is not stored with the counts; the temporary entries made from it expire within six hours and are cleared from the server within two days.
• What is kept. Daily totals only: page views for this site, and views and clicks for each ad. The adengine.us web server also keeps a standard access log (internet address, time, address requested, referring site, browser) for security; it is deleted on a rolling schedule.
• Clicking an ad passes through adengine.us, which counts the click, and then opens the advertiser's site, which has its own privacy policy.
• Nothing about you is sold or shared.

Questions: through WeldonPC.com.