Frequently asked questions

Start with the Learn VHDL path, then move to beginner VHDL exercises once entity, architecture, signal and testbench concepts are clear.

You can learn the basics with simulation: digital logic, synthesizable VHDL, testbenches and first RTL blocks. The FPGA path then connects code to hardware resources.

Yes. Courses, exercises, challenges, leaderboard and badges remain free. Free accounts have daily quotas: 12 simulations, 3 exercise completions and 3 completed quizzes. The Club adds unlimited usage, downloads and cosmetics.

There are four options: a 72-hour pass for €3.90, monthly at €4.99/month, annual at €44.99/year, or lifetime access at €99.99. The pass and lifetime access are one-time payments with no renewal; monthly and annual plans renew through Stripe.

From Account → Settings → Club and billing, open the Stripe portal and choose cancellation. Your access remains active until the end of the period already paid for. The 72-hour pass and lifetime access do not renew automatically.

A certification based on the platform requirements, delivered with a verifiable PDF and unique code. €79.00, or €55.30 with active Club access. The student discount does not apply.

Each exercise has a testbench. Your code is compiled and run with GHDL on our servers. Testbench assertions decide success. No tool to install.

Yes. Data is hosted in the EU (Hostinger, Lithuania). We only store data needed for the account, progress, security and purchases. No reselling, no targeted ads, with export and deletion available from your account.

Yes, any time from your account page. Deletion is immediate and irreversible.

All Visa, Mastercard and American Express cards via Stripe. Secure payment, no card data stored on our servers.

Yes, within 14 days of purchase, as long as Club features have not been substantially used. Contact us via the contact page.