Each word goes through a learning phase, then enters a revision schedule of 7, 14, 30, 90, 180, and 360 days. Words you spell correctly progress; words you miss fall back to learning. This is based on the Ebbinghaus forgetting curve.
iOS: open the iOS Settings app → tap your name at the top → Subscriptions → Spelling - SG → Cancel Subscription.
Web: go to the Settings page within the app and click "Manage Subscription".
You will retain access until the end of your current billing period.
No. Account deletion is permanent — all practice records are removed immediately and cannot be recovered. If you change your mind, you'll need to register a new account and start over.
Spelling lists are uploaded by parents themselves through the app. If you run into any issue uploading or editing a list, please contact us at admin@onechineseedu.com and we'll help fix it.
Subscriptions are tied to the platform you purchased on (Apple or Stripe), but your account works across both. If you subscribed on iOS, log in on the website with the same account to use the web version, and vice versa.
Make sure the username is typed exactly as registered (it is case-insensitive but spelling matters). If you've forgotten the password, please contact us — we'll reset it for you.
Passwords are hashed with bcrypt and never stored in plain text. We do not sell or share data with third parties. See our Privacy Policy for details.