Terms of Use

Effective: 11/13/2026

These terms are the agreement between you and Chase Nielsen, United States ("we", "us") for the Boost Opti app for Windows and the Pro subscription. By installing or using the app you accept them. If you do not accept them, do not install or use the app.

1. What Boost Opti is

Boost Opti checks the condition of your PC and can apply changes you choose: Windows settings, power plans, which programs start with Windows, removing temporary files, removing certain preinstalled apps, and resetting network settings. The free version runs the checks and a limited set of fixes. A Pro subscription unlocks the rest.

2. Your licence

We give you a personal, non-exclusive, non-transferable licence to install and use the app on PCs you own or are allowed to manage, for as long as you follow these terms. The app is licensed, not sold. We and our licensors keep all rights in it.

You may not:

• share, publish, sell or sublicense a licence key;
• get around the subscription check or the limit on PCs, or help anyone else to;
• copy, modify, reverse engineer or decompile the app, except where the law gives you a right to do so that cannot be removed by agreement;
• use the app on a PC without the permission of whoever is responsible for it;
• use the app to break the law.

Your licence key is personal to you. Keep it private.

The app includes open-source components under their own licences. Their notices are installed with the app, and nothing in these terms limits your rights under those licences.

3. Pro subscriptions

Buying. Subscriptions are sold by Lemon Squeezy, our reseller and merchant of record. Your purchase, payment, invoices and taxes are handled by them under their terms, which are shown at checkout. The price and billing period are the ones shown at checkout.

Renewal. A subscription renews automatically at the end of each billing period, at the price then in effect, until you cancel. If the price is going to change, we will tell you before your next renewal so that you can cancel first.

Cancelling. You can cancel at any time, using Manage subscription on the app's Plan page or the link in your receipt. Pro continues until the end of the period you have paid for, then stops. Cancelling does not undo changes the app has made to your PC, and you can still undo them yourself (see section 4).

Refunds. See our Refund Policy.

One subscription, one PC. A subscription works on the number of PCs stated when you bought it, which is one unless stated otherwise. To enforce this, the app identifies your PC to our licence server, as described in our Privacy Policy. You can move your subscription to another PC yourself a limited number of times in any 30 days; beyond that, contact us. Replacing a part or reinstalling Windows does not normally count as a new PC.

Staying connected. The app confirms your subscription with our server about twice a day. Without an internet connection, Pro keeps working for up to 7 days and then pauses until the app can connect again.

When we may suspend or end a subscription. We may suspend or revoke a licence, and may block the hardware involved, if a key is shared or resold, if a payment is reversed or fraudulent, or if these terms are otherwise seriously broken. If we end a subscription for a reason that is not your doing, we will refund the unused part.

4. Changes to your PC are yours to choose

Nothing on your PC is changed until you choose a fix. For each one, the app says what it will do. You are responsible for deciding whether a change is right for your PC, and for keeping backups of anything you cannot afford to lose.

In particular:

• Deleting is permanent. Clearing temporary files, emptying the Recycle Bin and clearing the Windows Update cache cannot be undone. The app asks you to confirm before each.
• Settings changes can be undone from the app's History, including after a subscription ends. Undo restores what the app recorded at the time. It cannot account for changes made since then by you, by Windows or by other software.
• Some changes need administrator rights, and some need a restart to take effect.
• The app can create a Windows restore point before making changes, when it has administrator rights and that option is switched on. Restore points are a Windows feature and may be unavailable or switched off on your PC.

5. What we do not promise

The app reports what your PC tells it about itself. It is not a diagnosis by a technician, not a guarantee that your hardware is healthy, and not a substitute for backups or for security software. A drive, battery or other part can fail without any warning sign the app can see.

Certificates and care links. If you choose to publish a check as a certificate, or to switch on a care link, the results are shown on a web page to anyone who has its address. You decide who that is; treat the address as you would the results themselves. A certificate records what the app found on that PC at that moment and shows that the record has not been changed since. It is not a warranty or an inspection by us, it says nothing about faults the app cannot see or about anything that happened afterwards, and anyone relying on it (a buyer, for example) should check the PC for themselves. We may remove a page that is being used to mislead people or in breach of these terms.

We do not promise that any change will make your PC faster, or by how much. Results depend on your hardware and software. The app's Proof feature exists so that you can measure the effect on your own PC and undo changes that did not help.

Apart from what these terms expressly say, and to the extent the law allows, the app is provided "as is" and "as available", without warranties of any kind, whether express or implied, including any implied warranties of merchantability, fitness for a particular purpose and non-infringement.

6. Limits on our liability

To the extent the law allows:

• we are not liable for loss of data, loss of profits or business, or any indirect or consequential loss arising from your use of the app; and
• our total liability to you for everything connected with the app is limited to the greater of the amount you paid for your subscription in the 12 months before the claim arose and US $50.

Nothing in these terms limits or excludes liability that cannot be limited by law, such as liability for death or personal injury caused by negligence, for fraud, or for deliberate wrongdoing. Nothing in these terms takes away rights you have as a consumer under the law of the country where you live. If you are a consumer in the European Union, the United Kingdom, Australia or another place with mandatory consumer guarantees, those guarantees apply alongside these terms.

7. Updates and changes to the service

We may release updates that add, change or remove features, and you may need to install an update to keep using Pro. We may stop offering the app or the subscription. If we do, subscriptions will not renew, and we will refund the unused part of any period you have already paid for.

8. Privacy

Our Privacy Policy explains what the app sends us and why. In short: the health check's results stay on your PC, and only a subscription makes the app contact our server.

9. Changes to these terms

We may update these terms. If a change is significant, we will tell you in the app or by email at least 30 days before it applies to you. If you do not agree, you can cancel before then. Continuing to use Pro after that date means you accept the new terms.

10. General

• Who can buy. You must be at least 18, or the age of majority where you live if that is higher, to buy a subscription.
• Governing law. These terms are governed by the law of United States. If you are a consumer, you also keep the protection of the mandatory laws of the country where you live, and you may bring a claim in the courts there.
• If part of these terms cannot be enforced, the rest still applies.
• No waiver. If we do not enforce a term straight away, we can still do so later.
• Transfer. You may not transfer your rights under these terms. We may transfer ours to a business that takes over the app, provided your rights are not reduced.
• Trademarks. Windows is a trademark of the Microsoft group of companies. Boost Opti is not affiliated with or endorsed by Microsoft.

11. Contact

Chase Nielsen, United States. Email: support@boostopti.com.