Terms of Service
Last updated: November 15, 2026. Operated by Etymology Music Group.
Hippobooks (and Sensei, the hippo in the app) is a bookkeeping, mileage, and expense companion operated by Etymology Music Group. These terms describe the ground rules for using it. If you have questions, email contact@etymologyrecords.com.
Hippobooks is in beta. Features may change, and there may be bugs. Please keep your own copy of anything important (you can export or download a backup from More). We will do our best to keep the service careful and private, but we cannot promise it will always be available or error-free.
You must be 18 or older to use Hippobooks. You need an account to use the app. Keep your password and passkeys to yourself. The books, receipts, trips, and chat in your account belong to you and are kept separate from other accounts. You are responsible for the information you enter and for how you use it.
Sensei helps you record expenses, trips, and related notes. That is not tax advice, legal advice, or accounting advice, and it is not a substitute for a bookkeeper, accountant, or tax professional. Category suggestions, mileage rates, and similar helpers are tools — you are responsible for checking that your records are accurate and complete before you file anything.
Optional AI features may send what is needed for a request (for example, a chat message, a receipt image, or a short voice clip) to an AI service so Sensei can suggest a filing or a reply. Suggestions can be wrong. You can review, edit, or ignore them, and you can always log by hand. During this beta, AI help is limited per account so costs stay reasonable.
Connecting a bank is optional and goes through Plaid. Mileage tracking is also optional. If you use these features, you agree to do so only for accounts and trips you are allowed to record. 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. Please read the Privacy Policy for more detail, including Plaid’s End User Privacy Policy.
Don’t try to break the service, reach another person’s account, or use Hippobooks for anything unlawful. Don’t upload data you don’t have the right to store. We may suspend or close an account that is being misused, and we will delete an account when you ask us to (in the app or by email).
The service is provided as-is, as available, during this beta. To the extent the law allows, Etymology Music Group is not liable for lost profits, lost records, or indirect or consequential damages, or for decisions you make based on suggestions in the app. To the extent the law allows, Etymology Music Group’s liability to you is limited to the greater of what you paid us in the prior 12 months or $50. During this friends-and-family beta, Hippobooks is free, so that amount is $50 unless you later pay us. Nothing in these draft terms is meant to take away rights you cannot sign away under applicable law. This section in particular should get a lawyer’s glance before anyone relies on it.
If a data breach affects your account, we will notify you as required by law.
These terms are governed by the laws of the State of Texas, without regard to conflict-of-law rules. The venue for any dispute is Travis County, Texas.
We may update these terms as the product grows. If we make a material change, we will notify affected users in the app or by email, and we will update the date at the top of this page. While this draft is in review, please treat it as a working description of the ground rules, not a finished legal document.
Etymology Music Group
Email: contact@etymologyrecords.com