NullprintThese Terms are an agreement between you and HENGCHENG LLC ("we", "us") governing your use of the Nullprint software and related services (the "Service"). By registering an account, downloading or using the Service, you agree to these Terms. If you do not agree, do not use the Service.
1. The Service
Nullprint is multi-profile browser software installed on your computer. It is used to create and manage isolated browser profiles, and includes fingerprint configuration, proxy management, consistency check-ups, window tiling and sync, team management, a local API and MCP, among other features. The number of profiles and members available on each plan is as shown on the pricing section of our website and in your account.
The Service does not include a proxy network. You must provide your own proxies and are responsible for their source and use.
We continuously update the software. Features may be added, changed or removed; we will try to communicate important changes through release notes.
2. Accounts and devices
- Provide a real, working email address when you register, and keep your account password secure. Actions taken under your account are treated as actions of the account holder.
- The account holder (owner) may create member accounts for staff, assign their permissions, and is responsible for their staff's use of the Service.
- Devices that sign in to the app are registered to the account. The owner can view and remove devices in the account portal.
- If you believe your account has been compromised, change your password immediately and contact us.
3. Subscriptions and renewal
- The Service is sold as plan-based subscriptions for 1 month, 3 months (15% off) or 12 months (30% off). Prices are in US dollars; the amount shown in your account at the time of payment applies.
- New accounts may try the Team plan free for 7 days. Please confirm during the trial that the software meets your needs before paying.
- Subscriptions are one-time payments and do not renew automatically. Renew in your account before expiry; if you renew before your plan expires, the new term is added after your current expiry date.
- If a trial or paid plan expires without renewal, your account automatically moves to the Free plan (5 profiles, 1 member): only your 5 oldest profiles can be opened, the remaining profiles are locked but not deleted, and member accounts are paused. Everything is restored when you renew.
- If you change plans during an active term, your remaining time is converted according to our rules. Your account shows the estimated amount and the new expiry date before you pay.
- We may change prices. Price changes do not affect subscription periods you have already paid for; new prices apply from your next payment.
4. Payment methods
Online payments are made in your account and processed by our third-party payment provider, Stripe, which supports cards, Alipay, WeChat Pay and other methods (subject to what the payment page actually shows). We do not store your full card number. If you pay by any other method, the method we confirm with you applies.
5. Refunds
Refund eligibility, non-refundable cases and how to request a refund are set out in Refunds & Disputes, which forms part of these Terms. In particular, payments made in cryptocurrency are non-refundable.
6. Acceptable use
You may use the Service only for lawful purposes. You must not use the Service to:
- commit fraud or scams, launder money, make unauthorized use of payment instruments, or impersonate others;
- access other people's accounts, systems or data without authorization, or engage in credential stuffing or account theft;
- send spam, distribute malware, or launch network attacks;
- infringe the intellectual property, privacy or other lawful rights of others;
- otherwise violate the laws and regulations of your location or of the location of the platforms you target.
You are responsible for complying with the rules of the websites and platforms you use. The Service provides browser environment isolation; it does not guarantee how any third-party platform will treat your accounts.
You must not crack the software, circumvent its licensing, or resell it. If you violate this section, we may suspend or terminate your account without prior notice, and no refund will be given.
7. Referral rewards
Customers who have purchased a paid plan can take part in our referral rewards program from the "Referral rewards" page in the app or account portal. The following rules apply:
- You earn 20% of the amount we actually receive (after payment processing fees) for plans purchased by customers you refer, for as long as they keep paying.
- A referred customer must register through your referral link or with your invite code. Each customer belongs to only one referrer.
- Orders that are refunded or voided do not earn rewards; rewards already credited for them are reversed.
- Rewards become available for withdrawal 7 days after the referred customer's payment.
- Withdrawals are paid in USDT (TRC20, BEP20 or ERC20). You can request a withdrawal once your available balance is at least $30 and at least 5 referred customers have purchased a plan. We review each request manually before paying. Make sure the network and address are correct; payments sent to an address you provided cannot be recovered.
- You may not refer yourself. Referring between multiple accounts controlled by the same person, fake or self-funded orders, and other forms of abuse are not allowed. We may hold suspicious rewards for review, cancel rewards obtained through abuse, and freeze the referral account.
- We may adjust the referral rules (including the reward rate and withdrawal conditions). Changes will be announced on the referral rewards page and by email at least 30 days before they take effect; rewards earned before a change takes effect are settled under the previous rules.
8. Data
Data from your browser profiles — cookies, login sessions, browsing history and the like — is stored on your own computer and is not uploaded to our servers. Account and subscription information, and the profile configs synced when you use team management (fingerprint, proxy settings, launch options), are stored on our servers. See our Privacy Policy for details.
You are responsible for keeping and backing up your local data. We cannot recover local data lost due to computer failure, accidental deletion, system reinstallation or similar causes.
9. Disclaimers and limitation of liability
- The Service is provided "as is". We work to keep the software stable and available, but we do not guarantee that it will be uninterrupted or error-free, nor that your accounts on any third-party platform will not be restricted or banned.
- We are not liable for indirect losses, lost profits, or loss of accounts or data arising from your use of, or inability to use, the Service.
- To the maximum extent permitted by law, our total liability in connection with the Service is limited to the fees you actually paid us in the 12 months before the event giving rise to the claim.
10. Termination
You may stop using the Service at any time. If you violate these Terms, we may suspend or terminate your account.
11. Changes to these Terms
We may revise these Terms from time to time. The revised version will be posted on this page with an updated "Last updated" date. We will announce material changes on our website or in the app. By continuing to use the Service after changes take effect, you accept the revised Terms.
12. Contact us
If you have any questions about these Terms, email [email protected].
HENGCHENG LLC