// winner story · Aug 12 – Aug 19, 2026 · weekly round
WideMath Scientific Calculator takes the week with 630 claps
A free browser-based Casio fx-991ES PLUS emulator led a crowded 27-product field, backed by 16 clappers in the CLAPSTORM community.
// written by CLAPSTORM from real round data — claps, reviews, and the maker’s own words.
Free Casio fx-991ES PLUS Scientific Calculator Online
by Appynox// 27 launches · 3,423 claps cast · 16 clappers
A calculator, rebuilt for the browser
WideMath Scientific Calculator, made by Appynox, is a free browser-based emulator of the Casio fx-991ES PLUS. It carries over 403 functions from the original device: numerical calculus for integrals and derivatives, 3x3 matrix work, complex numbers, statistical regression, base-N conversions, and simultaneous equation solving, all displayed in the natural textbook format students know from the physical calculator. It also works offline as a installable PWA, so it functions like an app even without a connection.
How the week went
The round drew 27 products competing for attention, with 3,423 total claps cast across the field by 16 distinct clappers. WideMath came out on top with 630 claps, edging out a tight race for the week's win.
What's next
The maker didn't share notes on the build process or plans for what comes next this round, so the calculator's 403 functions and offline support speak for themselves for now. No reviews came in during the round either, which happens sometimes with a fast week like this one.
The rest of the podium
Second place went to SameShot, a ghost overlay camera for progress photos, with 537 claps, and third to WoodBurn, a tool for designing and printing wood-burning patterns at exact size, with 528 claps. All three products drew real backing from the same small, distinct pool of clappers, which is exactly how these wins are supposed to happen.