Keep the version attached
Playing rules, bidding systems and settlement can differ. We identify a source before describing a variant and make the calculator’s limits visible. Original exercises are suggestions, not new official rules.
No imaginary testing
A checked listing is research. A hands-on claim needs a date, device, version or mode and concrete observations. We do not publish made-up ratings or claim every app is available in every region.
Corrections
Send the page URL, the relevant wording and a complete reference through Contact. Initial source checks were completed on 20 October 2026.