Official guidelines for retard.dev products and modifications
If you selected the "Modify Mine" option, please send your device to our lab at the following address:
Include a note with your Email inside the package.
Use a bubble mailer or padded box. We are not responsible for damage during transit to us.
Retain your tracking number until we confirm receipt of your device.
We provide modification services for Texas Instruments calculators (TI-84 Plus / Silver Edition). Direct purchases include the hardware cost, while Pre-Purchased options require you to provide the device.
You retain full ownership of the hardware. Your purchase is a one-time payment — WiFi, chat tools, and AI features are included at no extra cost, with no monthly fees or subscriptions.
Modifying your hardware voids manufacturer warranties. We are not affiliated with Texas Instruments or OpenAI. We are not responsible for academic penalties or disciplinary actions resulting from the use of our products.
Refunds are handled case-by-case. Once a mod begins, refunds are unavailable. We cover return shipping to you, but original shipping to us is the customer's responsibility.
Customers agree not to reverse-engineer, redistribute, or circumvent the subscription/security systems of our software.
No sensitive payment information is stored on our servers. Only your name and email are retained for order processing. View our full Privacy Policy.