PowerOne® is a different kind of calculator focused on performing repetitive calculations quickly and accurately.

● Multiple-time Apple staff pick
● "The crème de la crème 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 … calculator app I have ever seen." - Worldwide Tech
● "… PowerOne shines." - Mac Observer


● Quick and accurate. Templates act similar to locked-down, mini-spreadsheets that increase accuracy and speed for repetitive calculations.

● Get up and running fast. We provide access to over a hundred pre-created templates for everything from finance, conversions, real estate, business, investing, construction, engineering, and more.

● Everyone’s needs are different. Pick and choose from an always growing selection of templates we provide, or create your own. Use our intuitive language to make writing your own templates as simple as typing this sentence.

● Access PowerOne everywhere. Whether on the go with your phone or tablet or at your desk on the web, PowerOne makes sure your critical calculations are available at your fingertips.

● Keep everyone on the same page. Share your templates with your team and customers, ensuring that everyone is performing the same error-free calculations every single time. [Pro Feature]

● The everything calculator. For those one-off calculation needs, PowerOne provides a powerful standard and RPN calculator.


Templates are designed like locked down, mini-spreadsheets. Enter the data you know. PowerOne will calculate the rest.

PowerOne includes a full-featured standard and RPN calculator to perform all your one-off calculations. There are over a hundred functions to help with virtually anything: basic math, powers, logs, trigonometry, probability, programmer’s math, fractions, and Imperial and metric units. Keep a history, store to memory, and move results between templates and the calculator easily.

Some calculations are common and performed all the time. PowerOne comes with a library of over a hundred off-the-shelf calculations you can use to get up-and-running quickly. Whether finance, conversions, real estate, investing, science, engineering, math, or construction, PowerOne has you covered.

While some calculations are common, there are millions more specific to you or your business. With PowerOne, it is easy to create powerful templates of your own. Just type an equation like you would a sentence and PowerOne will figure it out for you. Or get more sophisticated: create beautiful templates with embedded videos and images, with explanation text, lists and tables, Imperial and metric units, and hundreds of additional features to make it even easier for you, your team, and your customers to perform their own calculations without having to think about the math.

Changes you make on one device automatically sync to your other systems. Whether working offline on your phone and tablet or online on the web, your templates and calculator always remain up-to-date with the latest changes you’ve made and calculations you’ve run.

Keep your entire team or customers on the same page by sharing your templates with them. You never have to worry about them performing the wrong calculations with the wrong data as you can update and share your changes with them automatically at any time. [Pro Feature]


After more than 20 years and 20 million software calculators distributed, Infinity Softworks has earned its reputation for high quality apps. We'd love to hear from you. Please visit us at, or share ideas, get help and resolve problems by emailing us at

What's New

Version 5.1.2

- Selecting done button in the calculator when viewing history now shows keyboard, tap again to dismiss calculator completely
- Option to add left and right parenthesis separately or 000 buttons to your custom calculator keyboards; all three are also available in the math list
- Fixed a bug where modulo function mod() would return an error if the result of the division caused lots of decimal places
- Other bug fixes and smaller improvements

Ratings and Reviews

3.5 out of 5

30 Ratings

30 Ratings



I’m a long time customer of PowerOne, been using it for a few years now. This is by far the best app I’ve ever downloaded from the app store. The developer likes to call it a Smart Calculator, and it is, but it’s so much more, although it does have a great calculator. However, I found the templates are the real gem. I’m a carpenter and I needed something to calculate a bunch of equations I use all the time. Bought one of those construction masters, but found it almost impossible to use with any confidence. First off, they’re designed and written by programers. Second they don’t think like a carpenter and every time a real carpenter try’s to use it he needs a manual. PowerOne fixed that problem by letting the carpenter write and design his own calculator, and they made it easy too. The best tool used for calculations is Excel, but it’s made for a computer screen and comes up short on a smart phone screen. PowerOne does what Excel does, but for the mobile device screen size. Excel calculates, but you won’t call it a calculator. PowerOne calculates too, but it shouldn’t be call a calculator either. Trust me, it’s so much more.

Excellent app, a real time saver!


This is an amazing app. I’ve been using it for years and this new version is very nice.

I use it for my calculations at work as well as at home (My hobby is woodworking and enjoy easy calculations with fractions in the shop). I like that I can bring all of the templates I use together. I use many of the community created/and provided for free templates as well as a few I created on my own. Elia, the developer, has always been very approachable and helpful in listening to users and updating the app accordingly.

I'm so happy to create an account. The ability to have all of my templates on all of my devices without doing anything, have access to them on the web, to have them auto-install on my new phone when I get one is such a huge benefit and time saver!



Update: Just found out original app is not going away. Whew! Thank you!

I am concerned that I now have to create an account to use the app I’ve already purchased. I don’t want my calculators in the cloud. I don’t want to remember another login. Sure some will like it’s enhanced features but I do not. I don’t like that the new nature of using this app takes me from app owner to an unwilling member of your community. My reasons mainly revolve around privacy. I enjoy the app so please don’t FORCE me to signup to use the very app I’ve already paid for. Additional cost or not.

Developer Response

Hi MarcMolina,

Thanks for updating your review. Let me be as clear as I can:

- Version 4, the previous version, is exactly the same. Nothing has changed about it. You do not need to create an account to use it and you can continue to use it for as long as it will run on your current and new devices. We removed it from sale and are no longer updating it but you can always download the last released version from your previous purchases.

- Version 5, the new version, is a completely separate application. You can choose to download and use it or not. It does require an account to use it as we added features that require an account, including syncing across your devices and access to a web version. Once you log in once it remembers you (in Apple's secure keychain) so you only should have to enter your account once.

I understand your concerns and appreciate that you would prefer not to create an account. That's exactly why we gave you the choice of using the new version or sticking with the old one.



Infinity Softworks, Inc.
6.9 MB
Requires iOS 10.3 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 1998-2018 Infinity Softworks, Inc.


  • Family Sharing

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

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