CalMo

Just calculate. When a result has a simple closed form — a fraction, a square root or a multiple of π — CalMo shows it in colour under the decimal, for example sin 60° = √3/2. Numbers you type in yourself are never “guessed” into exact forms.

It switches sin, cos and tan to their inverses, ln to eˣ, log to 10ˣ, π to e, √ to ∛x, x² to %, 1/x to x! and xʸ to ʸ√x. Tap 2nd again to switch back. With 2nd on, AC becomes Clr Ans: it clears the entry and the previous answer.

In the Equations tab choose Polynomial, enter the coefficients and pick <, ≤, > or ≥ under the equation. The solution is shown in both notations and shaded on the plot.

It only searches the range you set (by default −10 to 10; 0 to 360 in DEG when the equation uses trigonometry). Widen the range, and check that functions are written as sin(x) or sin x.

Press Ans To combine two results, tap the first, press an operator such as ÷, then tap the second in History: after an operator, a result is added to your calculation instead of replacing it. to insert the previous answer. In the History tab, tap a calculation to continue with its result, press and hold it to edit it, or tap → Ans to use it in your current calculation. Tap an equation, graph or calculus entry to reopen it.

Type up to four functions in the Graph tab. Drag sideways with one finger, or in any direction with two (swiping up or down scrolls the page); pinch with your fingers side by side to zoom x only, one above the other for y only, diagonally for both. Press and hold to trace a curve; double-tap to reset. Window sets exact ranges and switches the x-axis between multiples of π and decimals.

Formulas such as d/dx sin x = cos x hold only when x is in radians (π rad = 180°), so the calculator’s DEG setting does not apply to derivatives, integrals, limits and series.

Yes. Every feature is included — equations, graphs, calculus, physics with formulas, elements and materials, the full history and all colour schemes — with no in-app purchases, no subscription and no ads.

Numbers go in with CalMo’s own keypad — Next moves to the next field. When you type a formula, a row of math keys (x, ^, √, π, sin, ln …) sits on top of the keyboard. You can write 2x, x(x + 1) or x sin x without a multiplication sign.

Open the Φ tab. Type a number, then tap unit to add a unit or const to add a constant: 70 kg × 9.81 m/s² gives 686.7 N. Results are simplified to named SI units (J, N, W, Pa …); to see one in another unit, add → and a unit, for example mₑ × c² → MeV. Adding quantities that don’t match, such as 3 m + 2 s, is refused with the reason. The Φ tab also has a unit converter and a list of physical constants with their uncertainties.

In the Φ tab open Formulas (the book icon) and pick one, for example Discharging a capacitor. Fill in every value but one: the empty one is calculated as you type, in the unit you choose. The ħ button beside a field offers constants, molar masses and the properties of elements and materials. Tap Plot to see the result against time or another variable; Compare draws one curve per value, and Trajectory draws the path of a projectile.

In the Φ tab open the constants (ħ) and switch to Elements or Materials. Tap an element or a material to see its properties, and tap a property to use it in the calculator. You can also type them: ρ(Fe) × 1 cm³ → g, ρ_e(copper) × 10 m / 1.5 mm² → mΩ, T_b(LN2) → °C. Values are at 20 °C and 1 atm unless noted; for alloys, plastics and glass they are typical values.

They are off by default, so the calculator stays simple. Turn them on in About (the i button) → Complex numbers; a ℂ appears beside DEG. Then √−1 = i and results are written a + bi, exactly when possible (√3/2 + (1/2)i), with a small drawing in the complex plane. Tap the ℂ for i, ∠ (polar entry: 2∠30), conj, |z|, arg, Re and Im; tap the result to see it as r∠θ or r·e^(iθ). In Equations → Polynomial the roots are also drawn in the complex plane. The same panel has Turn off; About turns them on again.