Help center

On the sign-in screen, tap “Forgot password”. The app emails a reset link to the address you registered with.

Open that email and set a new password. If it does not arrive, check spam and that you are looking at the registered inbox.

In the app, open the Profile tab, tap the settings icon, then Language. The list is every language the app currently offers, not only English and Vietnamese. The choice changes the interface and the language of the account’s content.

On this help page, the VI / EN control at the top right changes the website language only.

Learning progress belongs to the signed-in account. If a lesson does not save, confirm you are signed in and online, then reopen the app.

On a new device, sign in with the same account. Progress, the streak, and goals follow the account, not the device.

NihaoMando is free to download, and the HSK path is available on the free plan. The free plan has a daily cap on the AI tutor, pronunciation scoring, and grammar explanations.

Pro is 149.000₫ (VND) per month or 1.199.000₫ (VND) per year on the Vietnam App Store. Pro removes the daily cap on the AI tutor, pronunciation scoring, and grammar explanations, and raises the daily allowance for role-play and speaking practice.

Google Play and other storefronts may charge a different price. If a plan includes a free trial, its length is shown on the purchase button in the app.

Pro renews automatically until you cancel it with Apple or Google. If you are on Pro, open the Profile tab, open the plan screen, and tap “Cancel subscription”.

That opens Apple or Google’s subscription management, in the app or on the store page. The cancellation takes effect at the store. Cancelling does not delete your account or your learning progress.

If you already bought Pro and the app still shows the free plan, sign in to the same NihaoMando account and open the subscription screen.

Tap Restore. Restoration follows the Apple or Google account that paid, so the device needs to be signed in to that store account.

The path in the app runs from HSK 1 to HSK 6, and the free plan includes it. A lesson on the path counts as done when you finish it.

On the website, each level is at /hsk-1 through /hsk-6.

The streak advances when you finish a lesson on the path, using the calendar day of your profile timezone. Studying again the next day adds one.

Every 7-day milestone adds one freeze, and you can hold at most 2. A missed day spends a freeze when you have one, which keeps the streak. With no freeze left, the day you study again starts the streak at 1.

The daily reminder is in Settings, under notifications. A reminder does not itself advance the streak — the streak advances when you finish a lesson on the path.

If the device is blocking NihaoMando’s notifications, turn notification permission back on in the system Settings. The app cannot deliver a reminder while the system blocks it.

To practice speaking, allow the microphone when the app asks, or turn on NihaoMando’s microphone permission in the device Settings.

If the microphone stays silent, check that no other app is holding it, then speak closer to the device and try again.

If you cannot hear the model sentence, raise the device volume, turn off silent mode, and unplug headphones if you are not using them.

Microphone permission is only needed when you speak. Hearing the model sentence needs volume, not the microphone.

When you speak, the app scores how closely the reading matches the model sentence. The free plan has a daily cap on those scores. Pro removes that cap.

Tone feedback, when it is shown, appears separately from the reading score and can stay hidden when the app is not confident enough to judge. The reading score is not a tone verdict.

Open the gift link from the email. The claim page does not ask you to sign in on the spot, but the NihaoMando account must use the same email address the gift was sent to.

Each link can be claimed once. The gift is a Premium plan or a number of Premium days, shown on the claim page.

The claim page is in Vietnamese. “Không tìm thấy gift” means the link is not valid. “Gift đã được nhận” means it was already claimed. “Gift đã bị thu hồi” means it was revoked. “Chưa có tài khoản NihaoMando” means that email has no account yet.

Create an account with the gift’s email and open the link again. If it still will not claim, email support@thetwentylabs.com.

A referral code is entered in the app, on the “Mời bạn” card on the Profile tab. Each account can enter someone else’s code once, and you cannot use your own code.

If you have never entered anyone’s code, your own code is available immediately. If you have entered someone else’s code, yours unlocks only once the account is old enough and you have finished enough Path lessons with a score of at least 60. That screen shows the lesson count and the account age still required. Flashcard-only lessons are not scored, so they do not count.

This website has no discount-code box. Gifts arrive as links, not as a code typed here.

You can delete your account and all of its data at any time. Open the Profile tab, tap the settings icon, then “Delete account” at the bottom of that screen, and confirm. The account is removed immediately, and deletion is permanent.

If you no longer have the app, follow Account deletion. An email request is processed within 30 days.

The account holds your profile, login, learning progress, scores, streak, goals, and pronunciation recordings.

Deleting the account removes that data with it. The full list is in the Privacy Policy.

The Privacy Policy says what is collected and why. The Terms of Service cover using the app and paid plans. Account deletion is the step-by-step for removing your data.