Powerful scientific and graphing calculator includes algebraic, RPN input and over 400 free calculations. Feet-inches, fractions, matrices, stats, programmer's math and more. Create your own, keep a history and share with others.

powerOne calculators have been:
● Multiple time Apple staff pick including Best of 2010
● "The créme de la créme of calculators" - AppAdvice
● "Incredibly powerful tool for calculations of all kinds." - Smokin' Apps
● "You need this calculator. It's miles better than the competition." - Robert Burns
● "…sets the benchmark for other calculators to reach." - Fred Swan
● "Not sure how I could do my job without powerOne." - Arvid Martin
● "A legend. The best financial calculator app I have ever seen." - Worldwide Tech
● "… powerOne shines." - Mac Observer


Whether math and science, conversions, engineering, construction, finance, investing or real estate, powerOne has you covered. There are hundreds of spreadsheet-like calculator templates pre-installed or in the Library, ready right now for all kinds of what-if scenario analysis.

And for those one-off calculations use powerOne's elegant algebraic and RPN calculator. Perform calculations in either decimal, scientific, engineering, fraction or feet-inch format with functions that include powers, logs, trig and more.


Sometimes a number isn't enough. Visually seeing data in the form of a function graph, bar chart or scatter plot enhances understanding like a result never could. For instance, see functions come to life in function graph, view a bar chart of entered data in one-variable statistics or analyze scatter plots with optional regression curve in two-variable statistics. Zoom, pan, trace and analyze in many bundled and Library templates, or add to your own.


powerOne is easily customized. It includes a dynamic language to create your own calculator templates. It can be as easy as entering a formula similar to HP Solve or harness the complete capabilities of powerOne's simple scripting language. Hundreds of examples and instructions included.


Past computations are always available at your fingertips. powerOne automatically saves a history of your calculations. Name them, annotate them, share them or re-calculate.


Whether colleague or client, powerOne makes it easy to share the results and created templates, too. Just choose who to send it to. The results are in the email and so is the template. Click the attached template on an iPhone, iPod touch or iPad and it will load right into powerOne.


After 15 years and close to 20 million software calculators distributed, Infinity Softworks has earned its reputation for high quality apps. We'd love to hear from you, whether ideas, help or problems, at


This version of powerOne includes…

* Full-featured algebraic and RPN calculator with three theme options
* Pre-installed calculator templates:
- Function Graph
- Area Conversion
- Areas
- Energy Conversion
- Force Conversion
- Length Conversion
- Mass Conversion
- Power Conversion
- Pressure Conversion
- Probability
- Pythagorean Theorem
- Statistics, One-Variable
- Statistics, Two-Variable
- Temperature Conversion
- Velocity Conversion
- Volume Conversion
- Volumes
* Access to hundreds of additional templates in the Library
* Create your own templates
* Perform decimal, fraction or feet-inch math with hundreds of functions ranging from powers and trig to programmer's math and matrices
* Save a history of all calculations automatically
* Share results and templates by simply entering a recipient

What's New

Version 4.1.11

General updates and improvements

Ratings and Reviews

4.8 out of 5
29 Ratings
29 Ratings

Never thought I would find this

I am a professional engineer working in a specialized industry. There are a number of calculations that I perform on a daily basis, many times per day. My HP48G has been a workhorse for me for 25+ years, and I still use it today. I figured it was time to find something that was programmable with a cleaner interface. I thought it would be nice to have something that I could use on my iPad. I spent a few months trying some other apps that didn’t quite fit my needs. Many of the calculations I perform require a specific format in the results. This app is versatile enough to adapt to just about any need you may have. The programming language is very easy to learn and understand. Highly recommended.

Developer Response

Thanks for such a positive review, JTaggart2. I'd love to learn more about what you are doing with powerOne, if you'd be open to emailing me at - Elia Freedman


Not Complete Pro Upgrade!

I selected the Pro upgrade option within Power One Lite when my previous purchase of it would not restore, and this app is what I got. It in ***NO*** way includes all of the individual packs you can purchase separately as promised, especially the financial ones.

It is ONLY a scientific calculator with conversions as well. It includes NONE of the financial calculations expected.

It does give access to a wide array of user-generated templates, but I want the ones written by the developer that were promised!

In order to get those financial applications, I had to purchase ANOTHER complete Power One app at additional expense, which DOUBLED the expected and promised cost of the upgrade.

I have relied on Power One for many years for basic calculations, and would have given the original Lite app 4-5 stars for what it does, but this bait-and-switch and doubled expense issue has eliminated most of them. I will probably still use the apps because I’ve now paid a fortune for them, but I’m left with a really bad taste in my mouth. Very disappointed...

Developer Response

Hi Wendyannh,

All the templates available in PowerOne Finance and the packs in the Lite version are available in the Library for PowerOne Scientific. (I should point out: and vice-a-versa. PowerOne Finance and PowerOne Scientific share the same library.) You are correct that the packs themselves are not available, but the individual templates within the packs definitely are. Check out the Financing, Investing and Business categories in the Library to find the templates you were looking for.

I hope you will take another look at the Library. There are hundreds of templates available for download, including all of those from the Lite packs.


p.s. I can be reached at if you need additional assistance.


Fantastic calculator

I love playing with numbers and always have this calculator is worth every penny if not just for the ability to add calculators on to it, one side note does I find that the only problem I have is trying to figure out how to do a logarithmic calculator as it seems to not do what it's supposed to when the equations are put in


Infinity Softworks, Inc.
8.8 MB
Requires iOS 9.3 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2000-2018 Infinity Softworks, Inc.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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