Terms

Who we are

Hack Calculator is handmade and sold in India. In these terms, “we” and “us” mean Hack Calculator, and “you” means you.

Questions about these terms: hello@hackcalc.dev.

Registering interest isn’t an order

The Register interest form only tells us you’d like one. You don’t pay anything through it, and it doesn’t make a contract of sale.

Before you pay, we’ll send you the final details, including the price and delivery. A sale is made only when you accept them and pay.

The price on this site is ₹15,000, with shipping and the charging dock included. We deliver in India only. The first batch is planned to ship in the first week of November 2026.

What Hack Calculator is

Hack Calculator is an OREVA OR‑240MS scientific calculator, rebuilt by hand with a small computer inside.

OREVA and OR‑240MS are trademarks of their owner. Hack Calculator isn’t affiliated with or endorsed by OREVA.

The pictures on this site are drawings. The real calculator and its charging dock may look a little different.

How you use it is your responsibility

You’re responsible for how, where and when you use Hack Calculator.

• Follow the law, and the rules of any school, college, university, exam, test, workplace or venue you’re in.
• Don’t use it where calculators or electronic devices aren’t allowed, including in exams and tests, or in any way that breaks those rules.
• It has Wi‑Fi, a microphone and storage, so a place that allows a normal calculator may not allow this one. If you aren’t sure, ask first.

As far as the law allows, we aren’t responsible for anything that results from how you use it, including disqualification, cancelled results, penalties or disciplinary action.

Online services and AI answers

Agent and voice typing use online services that you choose and pay for yourself, through your own keys. A key is a private code that lets the calculator use an online service.

Agent uses an AI key from OpenRouter or any AI service that works with OpenAI’s format. Voice typing uses a voice key from Groq. Their terms, prices and availability are theirs, not ours.

AI answers can be wrong. Check anything important yourself.

Keep your keys private. You’re responsible for them, and for any charges made with them.

Limitation of liability

As far as the law allows, we aren’t liable for indirect or consequential loss, such as lost files or lost time.

Our total liability to you is limited to the amount you paid for your Hack Calculator.

Nothing in these terms takes away rights you have under Indian consumer law.

Warranty and returns

Warranty and returns terms will be shared before you pay.

This website and the form

The Register interest form is run by Tally. What you enter goes to Tally and to us, and Tally’s privacy policy applies.

We count visits to this site with Cloudflare Web Analytics, which doesn’t use cookies.

The site saves one thing in your browser: your choice of light or dark.

Changes and law

We may update these terms. When we do, the date at the top changes.

The laws of India apply to these terms.