Best calculator apps for Android in 2026

DayCalcy, by developer Veevek, does one job: date arithmetic. It counts the days between two dates, adds or subtracts days, works out age, compares dates and handles time durations. Important dates can be saved as reminders that notify you when they arrive. Countdown widgets track upcoming events, and a Year Progress widget shows how far the current year has run.

The catalog gives version 3.43.8, updated November 4, 2026, at 1.7 MB. It is free, shows no ads and uses the GPL-3.0-only licence. Its description calls it private and fully offline. We rate it among our top picks.

DumberKit is written for keypad phones such as the Qin F21, Dumber Mini and Doov R77 Pro. It has no on-screen buttons. You type the calculation on the physical keys and press OK for the result. Touch is switched off inside the app, so nothing is pressed by accident in a pocket.

The star key adds an operator and pressing it again cycles to the next one. Holding it opens a palette with the caret, square root, parentheses, percent and plus-minus. The hash key enters a decimal point. Besides the calculator there are unit and currency converters. Version 1.1.0 was updated October 22, 2026, weighs 3 MB, shows no ads and uses GPL-3.0-only.

NerdCalci, from Vishal Telangre, treats a calculation more like a short script. You can define variables and reuse them, and the editor has syntax highlighting and file sessions. Percentages use plain phrasing such as 20% of 50000, and unit conversions read like 10 m in feet.

The catalog also mentions a calendar-aware date and time engine with timezone support. The app works without internet. Version 4.9.8 was updated October 14, 2026, takes 2.1 MB, is free, shows no ads and carries the GPL-3.0-or-later licence. It is our third top pick, and the one to try if a standard keypad feels too limiting.

Samsung Calculator covers the four basic operations and engineering calculations. A history icon opens past calculations, and tapping an earlier formula reuses it. A unit calculator comes as an extra.

The app is free, shows no ads and has no in-app purchases. Its version varies by device, and the last update on record is April 1, 2025. That is older than most apps here, so check what your own phone already ships with before adding anything.

Google's Calculator keeps the feature list short. It handles addition, subtraction, multiplication and division, and adds scientific operations such as trigonometric, logarithmic and exponential functions. There is nothing to configure.

Its 4.3 rating is the lowest among the apps with Play data on this page. It is free, with no ads and no in-app purchases. The latest update is September 16, 2026, and the version varies by device. For everyday sums and a quick sine or logarithm, the feature set is enough.

ClevCalc, from Cleveni Inc., bundles a scientific calculator with other tools in one app. The calculator supports basic arithmetic, squares, roots, parentheses and percentages, plus trigonometric, exponential and logarithmic functions. A freely movable cursor lets you edit an expression while you type it.

Its 4.6 rating is the highest among the big-install apps listed here. Version 2.24.15 was updated September 23, 2026. The app is free but shows ads and offers in-app purchases. It is described as an all-in-one tool for everyday calculations, so it fits people who prefer a single install over separate utilities.

Calculator Plus with History, by Digitalchemy, combines a basic calculator and a scientific one with date and percentage tools, financial and tax calculators, and currency and unit converters. It is suited to working out discounts and percentages while shopping, and to keeping track of bills, tax and expenses.

Google Play gives it a 4.9 rating, the highest in this list, with over 50 million installs. Version 8.1.10 was updated October 27, 2026. The app is free, shows ads and offers in-app purchases.

This app from SAMATICA Education Technology Company Limited targets school and university students. It groups several calculators: a basic 300 plus, an advanced 115 plus, and scientific 991 and 991 plus models. A graphing calculator is part of the package too.

Version 7.6.9.690 was updated October 22, 2026. The app is free, shows ads and offers in-app purchases. It suits anyone who already knows the key layout of a physical 991 calculator and wants the same arrangement on a phone.

HiPER Scientific Calculator, from HiPER Labs, handles symbolic algebra, integrals, derivatives, graphing and equations, and it shows step-by-step solutions. It covers fractions, matrices, vectors, statistics and complex numbers, and it follows the function sets of several 991, 570, 82 and 100MS models.

Three layouts exist: pocket for small devices, compact for phones in portrait and landscape, and expanded for tablets. Precision reaches 100 digits of significand and 9 digits of exponent. Version 12.1.4 was updated November 1, 2026. It shows ads but has no in-app purchases.

Desmos Graphing Calculator, from Desmos Inc, is built for plotting. You can graph functions, create tables and add sliders. It plots equations from lines and parabolas up to derivatives and Fourier series, and sliders let you vary values and watch the graph respond.

Version 7.59.0.0 was updated October 23, 2026. The app is free, with no ads and no in-app purchases, which makes it the only graphing option here without ads.