Jessica Martinez
Jessica writes the guides on this site: the discount and percentage walkthroughs, the age and date breakdowns, the fraction reference, and the Roman numeral rules people forget between one crossword and the next. Before she wrote full time, she spent six years as a credit analyst, reading loan files where a misplaced decimal changed what a borrower actually owed on paper. That habit, checking a number twice before trusting it, is why every worked example in her guides gets run back through the live calculator before it goes out.
Across the Encore network her beat is everyday consumer math, the kind of arithmetic people want double-checked rather than explained from first principles.
Chris Terry
Chris built all fourteen calculators on this site, from the date and age tools in the header to the Robux tax converter at the bottom of the list. Before any of Jessica's guides ships, he types her worked examples into the matching calculator himself and confirms the numbers agree.
He doesn't carry a byline on the guides. The editorial standards page is where he explains how that checking process actually runs.
Got a question for either of them?
Anything sent through the contact form reaches both. Chris handles anything about a calculator's behavior directly; a question about a specific guide usually gets forwarded to Jessica within a day or two.