We're happy to help.
VietLex teaches Vietnamese vocabulary the way it's actually used — frequency-ordered, with spaced repetition so words stick.
How do reviews work? Words you learn come back on a spaced schedule. Answer them in the Review flow to keep them fresh; mark words you already know to retire them.
What is VietLex Plus? A subscription that unlocks all 4,000+ words and the full searchable dictionary. It's $3.99/month or $29.99/year. Manage or cancel anytime in your Apple ID settings.
How do I restore a purchase? Open the paywall and tap "Restore purchases," or reinstall and sign in — your subscription follows your Apple ID.
How do I delete my account? Settings → Delete account.
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