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The best Android calculator depends on the work you need to do. Samsung Calculator is enough for everyday arithmetic and unit conversions, while HiPER, RealCalc, and GeoGebra are better suited to science, engineering, statistics, or graphing. If you want a calculator on the Home screen, check the Android widget picker on your own phone rather than trusting an old compatibility list.
This comparison covers 12 free or free-to-install Android calculator apps. Feature and Play Store details were checked on August 7, 2026. Some apps offer paid upgrades, advertising, or separate editions.
Quick comparison
| App | Best for | Important limitation or note |
|---|---|---|
| Samsung Calculator | Everyday calculations, conversions, and basic engineering functions | Primarily useful on Samsung Galaxy devices; reinstall through Galaxy Store if removed |
| HiPER Scientific Calculator | Advanced scientific, algebraic, statistical, and engineering work | Free version contains ads; interface can differ from older screenshots |
| RealCalc Scientific Calculator | A traditional scientific calculator with RPN and hexadecimal modes | The free edition does not include the Home-screen widget |
| GeoGebra Scientific Calculator | School mathematics, fractions, statistics, and an exam-style interface | Some users find its symbols and input behavior less intuitive |
| GeoGebra Graphing Calculator | Graphs, sliders, regressions, tables, and function analysis | Use GeoGebra CAS for symbolic derivatives, integrals, and equation solving |
| GeoGebra CAS Calculator | Computer algebra, equations, derivatives, and integrals | Users report sign-in and saving problems in some situations |
| ClevCalc | A broad collection of everyday calculators | Contains in-app purchases; Version 2.19.0 added a Percentage Calculator and a no-ads purchase option |
| Google Calculator | A simple calculator on compatible Android phones | Current widget and offline claims should be checked on the device |
| Calculator++ | Users looking for a third-party general calculator | Confirm its current Play Store listing, maintenance status, and widgets before installing |
| CalcES | Users comparing alternative scientific calculators | Current widget and offline support were not independently confirmed |
| Calculator by Simple Mobile Tools | Users seeking a lightweight alternative | Check the current publisher, listing, permissions, and widget availability |
| All-in-One Calculator | Users wanting several calculation categories in one app | Verify current features and advertising in Google Play before downloading |
The first seven entries have current first-party Google Play or manufacturer documentation behind the details below. The final five are included because they commonly appear in Android calculator roundups, but current widget and offline-support claims were not confirmed from a current first-party record. That distinction matters: app features and availability can change.
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1. Samsung Calculator
Samsung Calculator is the most practical choice for Galaxy owners who want a clean calculator without installing another app. Samsung documents basic calculations, engineering calculations, calculation history, and unit conversion.
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To open it, swipe up from a Home screen to open the Apps screen, then tap Calculator. Inside the app:
- Tap the History icon to see previous calculations.
- Tap the Keypad icon to close the history panel.
- Tap the Engineering calculator icon for additional scientific functions.
- Tap Unit calculator for conversions.
Google Play lists package com.sec.android.app.popupcalculator, 1B+ downloads, a 4.5-star rating, and an update dated March 31, 2025. Its current Data Safety declaration says no data is shared with third parties and no data is collected. If you uninstall it, Samsung says to reinstall it through the Galaxy Store.
2. HiPER Scientific Calculator
HiPER is the strongest option here for users who need more than trigonometry and percentages. Its Play listing documents symbolic algebra, systems of equations, derivatives, integrals, 2D and 3D graphs, matrices, vectors, statistics, regression, complex numbers, and binary, octal, and hexadecimal modes.
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HiPER is free to install but Google Play labels it Contains ads. Recent feedback also indicates that the current interface may not match older promotional screenshots. Its package name is cz.hipercalc, and the current listing shows an August 3, 2026 update. The Data Safety section says it may share device or other IDs with third parties while declaring no data collected.
3. RealCalc Scientific Calculator
RealCalc is designed to look and behave like a physical scientific calculator. It supports traditional algebraic entry as well as RPN, unit conversions, physical constants, percentages, result history, and ten memories.
Scientific and technical users can enable binary, octal, and hexadecimal calculations through Settings. The app also supports degrees, radians, and grads, plus scientific, engineering, and fixed-point display modes. External keyboard support is useful if you are entering repeated calculations on a tablet or Chromebook.
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The free package is uk.co.nickfines.RealCalc. Its current Play listing shows an August 22, 2025 update and declares no data shared with third parties and no data collected.
Rank #2
- Advanced scientific calculator with Natural Textbook Display showing expressions exactly as in textbooks.
4. GeoGebra Scientific Calculator
GeoGebra Scientific Calculator is aimed at students and teachers who need fractions, trigonometry, statistics, exponentials, and logarithms without the full complexity of a graphing or computer-algebra system. It also includes an exam mode that turns a phone or tablet into a more focused handheld-calculator interface.
The July 27, 2026 update added the ability to create a table of values for functions. A current user report says the app can feel limited compared with HiPER and that some symbols or input behavior are difficult to understand. Treat that as a usability warning rather than a documented defect.
This is a separate app from GeoGebra Graphing Calculator and GeoGebra CAS Calculator. Its package is org.geogebra.android.scicalc. Google Play says it does not share data with third parties, may collect app activity and app information/performance, and says collected data cannot be deleted.
5. GeoGebra Graphing Calculator
Choose this version when visualizing a function matters more than having a traditional keypad. It can plot ordinary, polar, and parametric curves; use sliders to explore transformations; identify roots, minima, maxima, and intersections; and calculate regressions with best-fit lines.
It also supports tables and statistics. The July 27, 2026 release notes say users can enter data easily into a table and calculate statistics. Results can be saved and shared.
Do not install this app expecting the full symbolic toolkit. The Play listing directs users who need equations, derivatives, and integrals to the separate CAS Calculator app. A reported edge case involves in-app help failing while a VPN was enabled; disabling the VPN was identified as the workaround in that report.
The package is org.geogebra.android. Its Data Safety declaration says it may share app activity with third parties and may collect personal info, files and documents, and app information/performance.
6. GeoGebra CAS Calculator
GeoGebra CAS is the appropriate GeoGebra app for symbolic mathematics. It combines function graphing with equation solving, roots, minima, maxima, intersections, derivatives, integrals, and regression.
It is not simply another name for the Scientific Calculator. Google Play lists a separate package, org.geogebra.android.cascalc, and a separate app entry. The current listing also mentions table-based data entry and statistics.
Rank #3
- Natural Textbook Display presents formulas and results exactly as written in textbooks for intuitive learning.
Saving and account access are the main caution. Repeated user feedback describes difficulty signing in or saving work, including reduced offline-saving capability in some circumstances. If a calculation is important, export or record it rather than relying on an unsynchronized session.
7. ClevCalc – Calculator
ClevCalc is a general-purpose calculator collection rather than a specialist mathematics environment. Its current listing covers basic arithmetic, square roots, parentheses, percentages, trigonometric functions, exponentials, and logarithms. Version 2.19.0 added a dedicated Percentage Calculator and an option to purchase a no-ads version.
The app includes in-app purchases. A recent review reports that ads loaded content and blocked calculator use. That is a reported failure mode, not evidence that every installation behaves that way, but it is worth considering if you need a calculator during work or exams.
The package name is com.dencreak.dlcalculator. ClevCalc is a reasonable choice for quick household, shopping, tax, tip, and percentage calculations, but HiPER or RealCalc is a better fit for sustained scientific work.
8. Google Calculator
Google Calculator is a familiar option on Android phones that include it or offer it through Google Play. It is best considered for straightforward arithmetic rather than as a replacement for a full scientific, graphing, or CAS application.
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Current widget availability, offline behavior, and device compatibility were not independently confirmed in the available first-party evidence for this comparison. Check the installed phone’s widget picker and the current Google Play entry before relying on it as a Home-screen tool.
9. Calculator++
Calculator++ is another name often included in lists of free Android calculators. It may appeal to users who want a third-party alternative to a manufacturer’s built-in app, but current widget support and offline behavior were not independently verified here.
Before installing, inspect the current Play Store page for the publisher, update date, permissions, advertising, and Data Safety declaration. Also test whether it handles the notation you use, particularly implied multiplication, negative exponents, and trigonometric angle modes.
10. CalcES
CalcES is commonly mentioned as an Android calculator option for users comparing scientific calculators. Its presence in a roundup should not be treated as confirmation that a widget is currently available or that all functions work offline.
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- Classic two-line scientific calculator with dependable performance for everyday math tasks.
If you are considering it, verify the current listing and perform a small test set after installation: parentheses, percentages, powers, logarithms, and degrees-versus-radians calculations. Those checks catch more practical problems than a long feature list.
11. Calculator by Simple Mobile Tools
This is a name associated with lightweight Android utility software and is often recommended when users prefer a less elaborate calculator. However, the current widget, offline, advertising, and maintenance details were not independently confirmed for this article.
Check the exact publisher and package shown in Google Play. Android can contain similarly named apps, and the name alone is not enough to identify a current, trustworthy listing.
12. All-in-One Calculator
All-in-One Calculator is intended for people who want several everyday calculation categories in one place. Because the available evidence did not independently confirm its current feature set, widget support, or offline behavior, treat it as an app to evaluate rather than a guaranteed recommendation.
Pay particular attention to whether its calculators cover the categories you actually need, such as loan payments, unit conversion, percentages, dates, or construction measurements. Also check advertising and in-app purchase details before making it your default.
How to add a calculator widget on Android
Widget support is app-specific and launcher-specific. The general Android procedure is:
- Long-press an empty area of the Home screen.
- Tap Widgets.
- Find the calculator app in the widget list.
- Long-press the available widget and drag it to the Home screen.
- Position or resize it, then release it.
The labels can differ on Samsung, Pixel, Motorola, and third-party launchers. If the app does not appear in the widget picker, it does not currently expose a widget to that launcher. Do not assume that an app named in an online “calculator widgets” list still has an interactive widget.
RealCalc is a specific example: the free edition does not include the Home-screen widget; that feature belongs to RealCalc Plus. Widget claims for Google Calculator, Samsung Calculator, Calculator++, ClevCalc, and Simple Calculator were not confirmed from current first-party listings in the available research, so check the installed device.
Which calculator should you install?
- For a Samsung phone: start with Samsung Calculator. It already covers history, engineering functions, and unit conversion.
- For advanced scientific work: choose HiPER if you can tolerate ads, or RealCalc if you prefer a traditional interface.
- For graphing: use GeoGebra Graphing Calculator.
- For derivatives, integrals, and symbolic equations: use GeoGebra CAS Calculator.
- For school mathematics and exam practice: try GeoGebra Scientific Calculator, especially its exam mode.
- For household and percentage calculations: ClevCalc is convenient, but review its ad and purchase model first.
- For a widget: install the app you prefer, then verify it in Home screen → Widgets. Widget support cannot be assumed from the app’s name.
Privacy and advertising checks
Google Play’s Data Safety information is developer-provided and can vary by region, use, and age. It is useful for comparison, but “No data collected” should not be interpreted as a universal guarantee under every circumstance.
Best Value
- Natural Textbook Display presents formulas and results exactly as written in textbooks for intuitive learning.
Among the documented listings in this comparison, Samsung Calculator and RealCalc currently declare no data shared with third parties and no data collected. HiPER is marked as containing ads and says it may share device or other IDs with third parties. GeoGebra’s three calculator apps make different declarations involving app activity, personal information, files, documents, or performance data. Read the current listing before installing, particularly if the calculator will be used for confidential work.
FAQ
What is the best free calculator app for Android?
For general use on a Samsung phone, Samsung Calculator is the simplest choice. HiPER is the most capable scientific option, RealCalc offers a traditional scientific layout, and GeoGebra is better for graphing or computer algebra.
Which Android calculator apps support widgets?
Widget availability depends on the app, Android version, and launcher. Long-press the Home screen, choose Widgets, and search for the installed calculator. RealCalc’s widget is listed for the paid RealCalc Plus edition, not the free edition.
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It is free to install, but Google Play currently labels it Contains ads. Its listing documents optional advanced mathematical features, including graphs, algebra, matrices, statistics, complex numbers, and programmable precision.
Are GeoGebra Scientific, Graphing, and CAS the same app?
No. They are separate Google Play apps with separate package names. Scientific is aimed at calculator-style mathematics, Graphing focuses on plots and data, and CAS adds symbolic equation solving, derivatives, and integrals.
Does RealCalc Free have a widget?
No. The current Google Play listing places the Home-screen widget under RealCalc Plus, the paid edition. The free edition still includes scientific functions, RPN, conversions, histories, memories, and number-base modes.
Can I use these calculator apps offline?
Do not assume offline support from a roundup or app name. Some calculations may work without a connection, but features such as help, account syncing, saving, or online content can behave differently. Test the exact app after disabling Wi-Fi and mobile data.
The Bottom Line
Install Samsung Calculator for dependable everyday use on a Galaxy phone, HiPER for the broadest scientific feature set, RealCalc for a classic scientific-calculator experience, and the appropriate GeoGebra app for graphing or symbolic mathematics. ClevCalc is convenient for everyday calculation categories but has ads and in-app purchases. For widgets, use the Android widget picker on the target phone—the installed app, launcher, and edition determine what is actually available.
Quick Recap
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