No. RtlStudio does not offer a multi-month Pro trial. You can use Free tier tutorials and the Verilog lecture track at no cost; Pro is a paid annual subscription when you need Open IP, SkyWater sky130 synthesis mapping, and advanced lectures.

Yes. Cancel from Profile → Danger Zone or the cancel flow in-app. You keep Pro access until the end of your current annual billing period.

Initial purchases include a 7-day money-back guarantee only if you have not accessed premium assets (Open IP, Pro lectures, SkyWater sky130 synthesis mapping, and related libraries). Opening those assets waives the guarantee per our Terms. Request a refund before deleting your account—deletion first forfeits eligibility. Renewals are not refundable. Refunded accounts cannot repurchase Pro.

Yes, before your paid period ends. Resume turns auto-renewal back on at your locked annual rate. You are not charged on the day you resume—billing happens on your next renewal date.

If auto-renewal is still on and your annual charge fails, RtlStudio keeps Pro for up to 21 days after your billing period ends while Lemon Squeezy retries or you update your card (Update payment method in Profile). Cancelled subscriptions are not extended—Pro ends when the paid period ends. After 21 days without payment, access ends and your locked rate is forfeited. See our Terms.

Your funding-tier annual rate (e.g. $77–$166/yr while tiers are open) applies for as long as you remain subscribed without a long lapse. If you cancel and subscribe again later, you pay the then-current public price.

Verilator, Yosys, Slang, and related tools run as WebAssembly inside your browser tab. Workloads execute on your CPU — we are not metering shared cloud compile minutes.

RtlStudio has one paid plan. As we add new browser-native tools, panels, and curriculum, Pro subscribers get access — there is no separate Pro Plus or add-on tier. Free stays on today’s feature set.