MX Calculator vs Enter

StarCalc is a calculator designed for both speed and style. It keeps everyday math simple and efficient, while offering a more expressive visual experience than a standard calculator. Switch between distinct themes like modern, pixel, and retro to make your calculator feel fresh every time you use it. Features: Multiple visual skins with clearly different styles Auto-switch or manually choose your favorite theme Large, readable display with expression preview Fast everyday math with percent, sign toggle, decimals, and core operations Home Screen widget support for direct calculation Clean interaction design built for quick one-handed use StarCalc is a good fit for users who want a calculator that feels practical, polished, and enjoyable to use.

Enter is a Reverse Polish Notation calculator with a true four-level stack — for people who think in RPN and are tired of hunting for the equals key. Free to download, with every everyday function included. There are no parentheses and there is no equals. Type a number, press ENTER, type another, press the operation. The answer is already there. A TRUE FOUR-LEVEL STACK X, Y, Z and T, with T replicating as the stack drops — so a constant stays where you put it and repeated operations simply work. LAST x brings back the argument the previous function consumed. Roll up, roll down, exchange X and Y. Ten numbered storage registers that survive a relaunch. THE FUNCTIONS • Arithmetic, powers, roots and reciprocals • Sine, cosine and tangent with their inverses, in degrees, radians or gradians • Hyperbolics and their inverses • Natural and common logarithms with their exponentials • Percent and percent change, integer and fractional parts, absolute value, modulo, factorial • Combinations and permutations, polar and rectangular coordinates, decimal hours to hours-minutes-seconds • Twelve significant digits, shown as FIX, SCI, ENG or ALL A FINANCIAL KEYBOARD Switch keyboards for a financial calculator with the HP-12C's function set. The five keys — n, i, PV, PMT and FV — store or solve, the way HP's financial calculators have always worked: key in what you know and press the one you want. Amortization schedules rounded to the cents on the statement. Cash flows with NPV and IRR. Bond price and yield to maturity. Straight-line, sum-of-the-years'-digits and declining-balance depreciation. Simple interest on 360- and 365-day bases, percent of total, dates and days between dates, and the statistics keys with linear regression. Hold n, i, PV, PMT or FV to see what it is holding. UNDO, AND A PAPER TAPE Fifty levels of undo and redo, covering the stack, the registers, and whatever you were part-way through typing. The paper tape prints every number and every function beside its result — tap any line to lift that value straight back onto the stack. It survives a relaunch and copies out as text. CONVERSIONS AND CONSTANTS Ten quantities — length, mass, temperature, volume, area, speed, pressure, energy, power and force — with exact factors wherever the definition is exact. Twenty physical and mathematical constants, searchable, carried at full precision rather than rounded to the display. ON THE MAC The whole keyboard: digits, operators, Return for ENTER, Escape to clear, letters for the functions. A menu bar carrying the stack operations and the display modes with their shortcuts. FREE, WITH ENTER PRO Free: the stack, arithmetic, square roots and squares, reciprocals, percentages, the ten storage registers, undo, and the rest of the everyday keys. Enter Pro, one purchase with no subscription, unlocks the scientific functions — trigonometry, logarithms, exponentials and powers — and the financial keyboard, along with the paper tape, conversions, constants and the extended function list. It covers every iPhone and Mac on your Apple Account, and Family Sharing. Bought Enter before it was free? Everything stays unlocked. DESIGNED, NOT PORTED Keys that depress under your finger, and a keyboard of its own when you turn the iPhone on its side. Properly typeset notation — real superscripts, and a radical drawn to the weight of the type around it. A two-line display showing Y above X, so you always know what the stack is holding. PRIVATE No accounts. No analytics. No tracking. Nothing you calculate leaves your device.