We're here to help you get the most out of Gemistry.
For any questions, issues, or feedback, please email us and we'll get back to you as soon as possible.
Email: gemistryprosupport@eandtapps.co.uk
We aim to respond within 1–2 business days.
Open the app and tap the Account tab, then tap Manage Subscription (or tap any locked feature to go directly to the subscription screen). Choose your plan, select monthly or annual billing, and complete your purchase securely through the App Store.
Subscriptions are managed through Apple. Go to Settings → Apple ID → Subscriptions on your iPhone and select Gemistry to cancel or change your plan. You'll retain access to paid features until the end of your current billing period.
Open the app, go to the Subscription screen, and tap Restore Purchases. Your previous subscription will be detected via your Apple ID and restored automatically.
Go to the Account tab and scroll down to find Delete Account. Tapping this permanently removes your account and all locally stored data (vault entries, quiz progress, settings). Note: deleting your Gemistry account does not cancel an active subscription — you must do that separately via Settings → Apple ID → Subscriptions before deleting your account.
Your vault is stored locally on your device. If you've deleted and reinstalled the app, or deleted your account, those entries are not recoverable. We recommend noting important entries externally or using the export feature (Gemistry Lab) for safekeeping.
Free Explorer accounts have access to 20 gemstones in the encyclopedia, up to 3 vault entries, and Beginner and Intermediate quiz modes. Upgrade to Gemistry Pro or Lab for full access to all 74 gemstones and unlimited vault entries.
Gemistry Pro (£5.99/mo or £49/yr) gives you everything — all 74 gemstones, unlimited vault, exam quiz, spectroscope guides, the Gem Identifier, and collection analytics. Gemistry Lab (£12.99/mo or £99/yr) includes all of Pro plus professional notes, collection export, AI-powered gem identification, advanced courses, and priority support.
Try force-quitting the app and reopening it. If the issue persists, delete and reinstall the app from the App Store — your subscription will be restored automatically via Restore Purchases. If you're still experiencing problems, email us at gemistryprosupport@eandtapps.co.uk with your device model and iOS version.
Go to the Subscription screen and tap Restore Purchases. This re-syncs your purchase with the app. If the issue persists after restoring, email us at gemistryprosupport@eandtapps.co.uk and we'll help resolve it promptly.
We take your privacy seriously. View our full Privacy Policy and Terms of Use to understand how we handle your data and the terms governing your use of Gemistry.