Pricing
The calculators are free for ever. Pro adds unlimited saving, signed reports, version history, parameter sweeps, worst-case corners and review packs.
Every calculator, verdict, equation and explanation is free for ever, with no account. Money never changes an answer.
Free
Your plan$0for ever
No account needed.
Everything you need to get the number right, and room to save a few.
- All calculators, verdicts and equations
- 5 saved calculations and 1 project on a free account
- Without an account: 10 saved calculations and 2 projects on this device
- Markdown export, and copy results anywhere
Pro
Recommended$7per month
Billed yearly at $84.
For saved work that is part of the job: history, sweeps, corners, signed reports and review packs.
- Unlimited saved calculations and projects.
- Signed reports
- Version history
- Parameter sweep
- Worst-case corners
- Compare
- Design review packs
- Full exports
- Fab capability profiles
- Your logo on the reportSoon
Start 3-day free trialNo card. The 3 days start when you create the account.
Team
In development$15.20per seat, per month
From 3 seats.
For a group that reviews each other's work and needs one shared record of it.
- Everything in Pro, shared across the team
- Team workspaceSoon
What is in each plan
| Feature | Free | Pro | Team |
|---|---|---|---|
| Calculators and knowledge | |||
| All 36 calculators | ✓ | ✓ | ✓ |
| Verdicts, criteria and show working | ✓ | ✓ | ✓ |
| The principle behind every answer, with its standard | ✓ | ✓ | ✓ |
| Works offline at the bench | ✓ | ✓ | ✓ |
| Account | Not needed | ✓ | ✓ |
| Keeping your work | |||
| Saved calculations | 5 | Unlimited | Unlimited |
| Projects | 1 | Unlimited | Soon |
| Board profiles | 1 | 1, more soon | 1, more soon |
| Recent calculations on this device | ✓ | ✓ | ✓ |
| Version historyEvery edit to a saved calculation is kept, so you can see each earlier value. | Latest only | ✓ | ✓ |
| Proving it | |||
| Signed reports | — | Unlimited | Unlimited |
| Your logo on the reportFor the report that goes to a client or an auditor. | — | Soon | Soon |
| Design review packsSeal a project as one document with a code anyone can check, no account needed. | — | ✓ | ✓ |
| Public verification page for every report | ✓ | ✓ | ✓ |
| Second signature on a review | — | — | Soon |
| Analysis | |||
| Parameter sweepVary one input over a range and see the answer and verdict at each step, as a table and a curve. | — | ✓ | ✓ |
| Worst-case cornersPut a tolerance on each input and get the worst-case band around the answer. | — | ✓ | ✓ |
| CompareTwo saved calculations side by side, every difference marked. | — | ✓ | ✓ |
| Carry values to the next calculator | ✓ | ✓ | ✓ |
| Exports | |||
| Markdown export | ✓ | ✓ | ✓ |
| Full exportsCSV and JSON files of any result, sweep, tolerance run or project (Markdown stays free). | — | ✓ | ✓ |
| Your board and your fabricator | |||
| Fab capability profilesYour fabricator's limits, applied to the clearance and via checks. | — | ✓ | Soon |
| Working as a team | |||
| Team workspaceShared projects, roles, a second signature and an audit log. | — | — | Soon |
| Audit log of who changed what | — | — | Soon |
| For developers | |||
| Calculator APIThe same engine as a REST endpoint, for scripts and build pipelines. | — | Soon | Soon |
| Support | |||
| Support | Report a problem, from any page | Email, 2 working days | Priority |
Card payment is coming soon. To hear when it opens, email us: info@robustpcb.com
Questions
Is the free plan a trial?
No. Every calculator, verdict and equation is free for ever, with no account and no card. A free account also saves a few calculations. Pro removes that limit and adds signed reports and the analysis tools. It never changes a number.
Can I cancel?
Yes, at any time, with the link in your receipt or by writing to us. You keep Pro until the end of the period you paid for.
What happens when the trial ends?
Nothing is deleted or locked, and everything stays editable and exportable. If you are over a free limit, you cannot add more until you are back under it.
What about VAT and sales tax?
Prices exclude VAT and sales tax. At checkout, our payment provider adds the tax for your country and emails you a receipt.
Do I lose my saved work if I stop paying?
No. Your calculations, projects and reports stay as they are, editable and exportable. If you are over a free limit, you cannot add more until you are back under it.
Students and open hardware?
Email us. If you are learning, teaching or publishing your boards openly, we will find something that works.
Something bigger than a subscription, or a design you would rather hand over? Consulting