Halley Support
Need help with Halley? Write to contact@hmello.com and we'll get back to you as soon as we can. Please include your iPhone model and iOS version if something isn't working.
Frequently asked questions
How do I generate cards with AI? Sign in with Apple or Google (Account → Sign in), open a deck and tap Generate with AI. You can ask for any topic, paste your notes, pick a PDF, take a photo or use a YouTube video's captions. You review every card before it's added.
How many AI generations do I get? Free accounts get 4 generations every month. Halley Plus gives you 20 a month, the most powerful AI model and much bigger PDFs. Packs of 10 extra generations never expire.
How do I cancel Halley Plus? Open the Settings app on your iPhone → your name → Subscriptions → Halley → Cancel Subscription. You keep Plus until the end of the period you've already paid for.
How do I restore my purchases? Sign in with the same account you used to buy, then go to Account → Halley Plus → Restore purchases.
Where are my decks stored? On your iPhone. Your decks, cards and study history work offline and are not sent to us. Deleting the app also deletes them.
How do I delete my account? In the app, go to Account → Delete account. This erases your account, your extra generations and your usage count. Your decks stay on your iPhone. Deleting the account does not cancel a subscription; cancel it in the Settings app as described above.