Privacy Policy
Last updated: November 15, 2026. Operated by Etymology Music Group.
Hippobooks is a bookkeeping, mileage, and expense companion. The hippo you meet in the app is Sensei. The service is operated by Etymology Music Group. Questions about privacy: contact@etymologyrecords.com.
Each account’s data is kept on its own, separate from every other account. We do not sell your data. We do not use it to advertise to you. We do not share it with other users.
When you use Hippobooks, we store the information you give us so the app can do its job, including:
We also store a sign-in cookie so you stay signed in. The app does not use advertising or analytics trackers.
If you choose to connect a bank, that connection is made through Plaid. Your bank sign-in stays with Plaid and your bank — we do not see or store your bank password. Plaid sends us transaction details you have authorized (for example, merchant, amount, and date) so Sensei can help you review and file them. Those details are stored with your account on our servers, not mixed with anyone else’s. Please read Plaid’s End User Privacy Policy.
If you turn on drive tracking, location and route data are used to record your trips in Hippobooks. That data is stored with your account on the servers we use to run the app. Trip maps in the app do not use a map tile provider — route sketches are drawn on your device, and we do not load map tiles from any third party. We never sell location or route data or share it for advertising. It is only handled by the service providers that help run the app (hosting, and Plaid for bank data, an AI service for AI features), under their obligations.
Some companies help us run Hippobooks. They only get what they need to do that job, under their obligations to us:
Some features — Sensei chat, swipe classification, reading a receipt, or server-side voice transcription when your browser can’t do it — may send the text, receipt image, or short audio needed for that request to an AI service, so Sensei can suggest a filing or reply. We only send what is needed for that request. We do not sell this information. You can always log expenses and trips by hand without using AI help. Friends-and-family beta accounts have a daily and monthly limit on AI help so usage stays reasonable.
Hippobooks is for people 18 or older. It is not for children, and we do not knowingly collect personal information from anyone under 18.
You can delete your account in the app (More → Delete my account). That erases the books, receipts, drives, chat, and other records we keep for that account. Copies in backups are erased when those backups rotate out, on our regular backup rotation. You can also email contact@etymologyrecords.com and ask us to delete your account. We will do so on request.
If a data breach affects your account, we will notify you as required by law.
If this policy changes in a way that matters, we will notify affected users in the app or by email, and we will update this page and the date at the top. While this draft is in review, please treat it as a working description of how we handle data, not a finished legal document.
Etymology Music Group
Email: contact@etymologyrecords.com