Last updated: 10/11/2026
| Date | Calculator | Change |
|---|---|---|
| 10/27/2026 | Permutation and combination calculator | Combinations were wrong when choosing more than half of the items: C(5, 3) gave 6 instead of 10. |
| 10/26/2026 | Compound interest calculator | The table of examples said interest compounds once a year; the calculator compounds it monthly, and the text now says so. |
| 10/17/2026 | All | Launch of the US version with 57 calculators in English, 2026 IRS figures and US units. |
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