Jairus Calculator

Jairus Calculator puts a full scientific calculator on your iPhone. It's the Jairus Instruments JR-7: a solar-panel shell, a four-line display, glossy keys that press in. Turn the phone sideways and it becomes Jairus, a sheet where every line solves itself as you type. THE JR-7 CALCULATOR (UPRIGHT) • Exact fractions: 1/2 + 1/3 = 5/6, not 0.8333. Mixed numbers, and ◂▸ to flip between fraction and decimal. • Four-line display: see your last two problems and answers above what you're typing. • Trig (degrees or radians), logs, powers, roots, factorials, nCr and nPr, and scientific notation. • Store values in x, y, z, t, a, b and c, and reuse your last answer with Ans. • 2nd functions printed right above each key, just like a handheld. • Keys register the instant you touch them, with a light tap you can feel. • Remembers your last 80 calculations, even after you close the app. JAIRUS…