Effective from: 30/08/2026. This policy explains how credits, pricing, payment and refunds work in Vistra Browser.
This English text is a translation provided for convenience. The Vietnamese version is the binding original; if the two differ in meaning, the Vietnamese version prevails. You can read it at Chính sách thanh toán.
1. The credit model
Some features need server or AI processing, including translating text inside images and translating web page text with AI. Paid features share a single credit balance in your Vistra account.
Each processing pass deducts the credits corresponding to that request. The credits needed, or the pricing information, is shown in the App before you confirm, where appropriate.
The credit cost may vary with the type of feature, the amount of content to process, the resources required, and whether the content has been processed by the system before. If the same content already has a suitable result in the system, Vistra may apply a lower credit cost; if you ask for reprocessing and the system must run a fresh pass, credits may be charged again.
2. Buying credits
Credits are bought as separate, individual transactions. Before you buy, the App shows the necessary information such as the price of the package, the credits you receive, any entitlements included, and other material information about the transaction.
You are only charged when you actively confirm the purchase.
Vistra does not auto-renew packages, does not automatically buy more credits, and does not charge you automatically merely because you have purchased before.
When you run out of credits, you can keep using the free features or actively buy more credits if you want to use paid features.
3. Value and validity of credits
Credits can only be used inside Vistra, are not money or cryptocurrency, cannot be withdrawn as cash, may not be resold or transferred unless Vistra allows it, and are tied to the account that receives them.
The validity period of credits, if any, is clearly shown before you buy or receive them. If a package states that it does not expire, those credits remain usable until they are spent, the account is deleted, or another case provided for in this Policy and applicable law occurs.
Gifted, promotional or free credits may carry their own conditions and validity period.
4. Payment
Transactions may be processed through the payment platforms Vistra supports at the time of purchase.
Vistra does not directly request or store full bank card numbers, CVV/CVC codes, banking passwords, or banking sign-in details.
Credits are only added after the system receives confirmation that the transaction completed or is valid. If a transaction is declined, payment is incomplete, the transaction is cancelled, or the system cannot yet verify it, credits may not be added until the transaction status is confirmed.
If you paid successfully but have not received credits, please contact support and provide the necessary transaction details so we can check.
5. Refunds
Refund requests are handled under the policy of the corresponding payment platform, this Policy, and applicable law. Whether you have used some or all of the credits may be taken into account when handling a refund request, to the extent permitted by law.
If a transaction is refunded, cancelled or reversed, Vistra may reclaim the credits or entitlements granted from it. If the corresponding credits have already been used, Vistra may take reasonable measures in respect of the entitlements relating to that transaction, to the extent permitted by law.
Vistra may examine more closely any request showing signs of fraud, refund abuse, use of an unauthorised payment method, unusual chargebacks, or deliberately claiming credits and then reversing payment.
Carrying out such checks or applying anti-fraud measures does not remove the mandatory consumer rights you have under the law.
6. Duplicate transactions and payment errors
If you believe you were charged twice, paid successfully but did not receive credits, received the wrong number of credits, or see a transaction in the wrong state, please contact us so we can check.
Where we confirm a fault on Vistra's side, we will take appropriate action such as granting the missing credits, correcting the transaction status, or helping process a refund where necessary.
You should not repeat the same transaction several times in a row while the App is showing a "processing" state, as this may create several separate transactions.
7. Changes to prices and credit amounts
Vistra may change package prices, the credits in a package, how credits are calculated, the entitlements included, or promotional programmes. The price and credits applying to a transaction are those shown to you before you confirm the purchase.
A future price change does not alter credits already granted from a transaction completed earlier, except where an adjustment is needed because the transaction was refunded, cancelled or reversed, or because of a technical error, fraud, or a legal requirement.
You are not automatically charged a new price, because Vistra does not automatically make new purchases.
8. Promotional and free credits
Vistra may offer free credits, promotional codes, advertising rewards, follow or referral rewards, and other credit-gift programmes.
Credits from a promotional programme may have their own validity period, a limit on how many times they can be claimed, apply only to certain accounts or devices, or carry their own usage conditions. The specific conditions are shown with the programme where necessary.
Vistra may refuse or reclaim credits obtained through bots, multiple accounts, fraud, or deliberate circumvention of a programme's conditions.
9. Account deletion
If you actively delete your Vistra account, the remaining credits tied to that account will no longer be usable. Deleting an account does not by itself create a right to convert remaining credits into cash.
Some transaction information may continue to be stored for the period needed for reconciliation, accounting, dispute resolution, fraud prevention or legal obligations. Information retained for those purposes is not used to keep operating the deleted account as an active account.
10. Payment fraud and abuse
Vistra may temporarily restrict a transaction or an account where it has reasonable grounds to believe there has been fraudulent payment, use of an unauthorised payment method, forged transactions, manipulation of a credit balance, exploitation of a bug to obtain credits improperly, chargebacks showing signs of abuse, or creation of multiple accounts to take advantage of a payment or promotional programme.
Where we confirm that credits or entitlements were granted because of a technical error or fraud, Vistra may correct the corresponding balance.
These measures are applied to the extent permitted by law and are not intended to limit mandatory consumer rights.
11. Support
If you have a problem with payment, credits or a transaction, please contact: visiontranslate2026@gmail.com.
When contacting us about a transaction, you should provide the transaction id or the information needed so we can identify it faster.
Do not send us your banking password, an OTP code, or your card's CVV/CVC.