Terms of service

Last updated 12 November 2026

These terms cover the 84GPT dongle, the 84GPT calculator app, the app store and the online service behind them (together, "84GPT"). By buying or using 84GPT you agree to them.

Who can use it

You need to be at least 13 to make an account. If you're under 18, a parent or guardian has to agree to these terms and make any purchase.

Your account

• You sign in with Google, Apple or Microsoft. Keep that account secure; anyone who can sign in to it can use your 84GPT account.
• Each dongle has its own secret key. If a dongle is lost, unlink it from your account page.
• You can delete your account at any time from the account page.

Fair use and monthly limits

Each plan has monthly limits on AI questions, videos and messages, shown on the shop page and your account page. Don't try to get around them, share one account widely, or use 84GPT to send spam or abuse. We may suspend accounts that do.

School and exams

You're responsible for following your school's rules. 84GPT doesn't run in Press-to-Test mode. Unplug the dongle for any test unless you've been told it's allowed.

AI answers

AI Chat and Math answers come from an AI model and can be wrong. Check anything important, and don't rely on them for medical, legal or safety decisions.

Messages and the store

• Don't post anything illegal, hateful or harassing in Messages. Rooms can be reported, and we remove rooms that break this.
• Games and apps in the store belong to their authors. Install them at your own choice; a store listing isn't a promise they'll work on every calculator.

Other services

Some apps show content from other services, such as YouTube, Instagram and TikTok. That content belongs to its owners, and using it is subject to their terms too. Those services can change or stop working with 84GPT at any time.

Purchases

• Payments are handled by Stripe. Shipping is free. Any tax is shown at checkout.
• Pre-orders are charged when you order. If we can't ship within the time we said, you can cancel for a full refund.
• Returns, refunds and faulty units are covered on Shipping and returns.

Plus

• Plus renews every month until you cancel. Cancel any time from your account page with Manage billing; you keep Plus until the end of the month you've paid for.
• If we change the price, we'll email you at least 30 days before it applies to you.

Changes and availability

We keep improving 84GPT, so features can change. We aim to keep the service running but can't promise it will always be available. If we ever shut the online service down, we'll give at least 90 days' notice, and the dongle will keep working with your own server or API key.

Liability

84GPT is provided as is, as far as the law allows. We're not responsible for losses that come from using it, beyond the amount you paid us in the last 12 months. Nothing here limits rights you have under consumer law where you live.

Contact

Questions about these terms: contact us. We'll post changes on this page and update the date at the top; big changes will be emailed to account holders.