UltraCalc: 3D Graph & Math

Type a formula and see it as a 3D surface you can spin. Get the shapes a textbook cannot show, from high school math to college and your first investments.

Can't picture a 3D function from the flat drawing in your textbook? UltraCalc draws any z = f(x, y) as a shaded 3D surface you can spin with your finger. It's a scientific calculator that stays useful from high school math and college lectures to your first stock investments.

WHEN YOU NEED IT

• See what z = sin(x² + y²) really looks like, from every angle
• Read the exact intersections, peaks and valleys of a graph
• Drag a and b and watch the curve change
• Catch typing mistakes in a long formula before you press =
• Split a club party bill with seniors paying more, guests discounted and a subsidy
• Check your GPA or the estimated date of your next period
• Work out GDP growth and GDP per capita for an economics class
• Later, check whether a Japan-listed stock looks cheap

3D GRAPHS YOU CAN SPIN Shaded surfaces for z = f(x, y). Rotate them to see saddle points, peaks and cross-sections. Great for multivariable calculus and building spatial intuition.

2D GRAPHS YOU CAN READ BY TAPPING Curves appear as you type, with roots, maxima, minima and intersections marked. Use a and b to get sliders and explore how the shape changes.

A SCIENTIFIC CALCULATOR THAT SHOWS ITS WORK The expression and a live result stay on screen, so mistakes show up before you press =. Missing brackets are closed for you. Trig, log, n-th roots, factorials, GCD/LCM, fractions and physical constants are built in, plus a programmer calculator for hex and binary.

FOR COLLEGE LIFE

• Party bill split: set the course price, a subsidy, how much more seniors pay (double or 30% more with one tap) and guest discounts. Each person's share is rounded to 100 yen, and if the bill runs over, enter the total to see the extra per person
• GPA and test averages
• Period and ovulation estimates from your last start date and cycle length (not for medical decisions or contraception)
• GDP change, growth rate and GDP per capita

WHEN YOU START INVESTING For stock metrics, fair value and dividends, search a Japan-listed stock by code or name to fill in EPS, BPS, equity ratio, dividend and current price from its annual securities report (data processed from EDINET public filings). DCF valuation, US stocks in yen and gold prices are included too.

INCLUDED

• Calculators: 3D graph, 2D graph, scientific, programmer, standard
• Student life: party bill split, bill split, GPA, test average, period and ovulation estimate, resume age table
• Economics and investing: GDP, stock metrics, fair value, DCF, dividends, US stocks, gold, loans
• Tools: unit converter, world clock, Japanese era, date calculator, discount, tip, depreciation, dice

LANGUAGES English, Japanese, German and Simplified Chinese. The app follows your device language, and you can change it in Settings.

ULTRACALC PRO (OPTIONAL) Remove ads and focus on your work. Choose 1, 3 or 6 month plans (with a 7-day free trial) or a one-time purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the period. Manage them in Settings > your name > Subscriptions.

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