Terms

About this app

ChemTable is a browser-based interactive periodic table and chemistry reference tool. The full reference is free; optional Premium unlocks the complete printable reference sheets, quiz rounds drawn from your own filters, the compare tool with CSV download, and element notes. It is provided as-is for education and reference.

Premium subscriptions

Premium is optional. Subscriptions are billed through RevenueCat and Stripe, renew automatically, and can be cancelled anytime from the link in your receipt email; Lifetime is a one-time payment. Access is tied to this browser - keep your receipt email for recovery.

Refunds

Not happy with a purchase? Email [email protected] within 14 days of a first purchase, or within 7 days of a renewal, and we will refund it. Send the message from the email address you used at checkout, and include:

• the email address used at checkout (if you are writing from a different address)
• your access code, shown on the Premium page while you are signed in on the browser you purchased from
• roughly when you purchased, and which plan (weekly, yearly or lifetime)
• the last 4 digits of the card, if you have the receipt handy

That is everything needed to find the purchase and process the refund. This policy does not limit any statutory rights you may have.

Accuracy of reference data

Element properties, isotope data, and calculations are provided for educational reference. Verify important values against an authoritative source before relying on them for academic, professional, or safety-critical decisions.

Your local data

The app stores your favorites, notes, and preferences locally in your browser. You are responsible for exporting anything you want to keep, since clearing browser storage will remove it.

No warranty

The app is provided without warranty of any kind. The authors are not liable for any loss arising from use of the app or its reference data.