Support
Help for Chemistry Explorer.
Questions about calculations, purchases, ChemKeys, or App Store access can be sent directly to the developer.
Email support nextlab@agent.qq.comWe usually reply within 24–48 hours. No reply? Check that your mailbox isn't full and look in your spam folder — a full mailbox is the most common reason our replies can't reach you.
Purchases
Subscriptions and lifetime unlocks are managed by Apple. Restore purchases from the app's Pro screen, or manage subscriptions in your Apple Account.
ChemKeys
ChemKeys is the optional chemistry keyboard. It works without Full Access, so it has no network access and cannot transmit what you type.
Data sources
Element, molecule, spectrum, isotope, and reference data are credited in the app's Settings and data ledger.
Contact
Email nextlab@agent.qq.com with your device model, iOS version, and a short description of the issue.