PowerOne® is a different kind of calculator that helps you perform repetitive calculations quickly and accurately.

● Several-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." – The 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 with hundreds of pre-created templates for everything from finance, conversions, real estate, business, investing, construction, engineering, and more.

● 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 iPhone or iPad or at your desk on the web, PowerOne makes sure your critical calculations are available at your fingertips offline or on.

● 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. [Premium Feature]

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

● Highly customizable. Not only templates but calculator functions and themes! Match your mood and make it the product you want to use every day.


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 hundreds of off-the-shelf calculations you can use to get up-and-running quickly. Whether finance, conversions, real estate, investing, science, engineering, math, construction, health, or fitness, 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.

Make it yours. PowerOne includes 12 themes in both light and dark versions. Increase your productivity by matching the theme to your task or mood.


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


- Run PowerOne offline on your iPhone or iPad
- Download hundreds of templates from the library
- Full-featured standard and RPN calculator
- Sample creating your own template
- Share template results via email
- Go light or dark with your choice of themes

What's New

Version 6.0

Major revision of PowerOne from your feedback. We spent thousands of hours rethinking, rewriting, and redesigning PowerOne.

- Hundreds of calculation templates available from the library
- Redesigned, full-featured standard and RPN calculator available from anywhere
- Improved template-calculator integration
- Improved iPad Slide Over and Split View support
- Improved keyboard support for templates + better table editing
- Add to Siri available from the extras (•••) menu in both templates and the calculator
- Search templates from the application launcher
- Full hardware keyboard support
- Dynamic type and VoiceOver support across the entire app
- Beautiful themes makes PowerOne more personal

Ratings and Reviews

Still the best!


I am also a client/user since the PalmPilot days. This new version, despite having some drawbacks, like having to sign on (as many people have pointed out), layout changes, unable to reorganize templates as one would wish, and other minor interface issues, I firmly believe this is still the best analytical/computational application available. I like the ability to sync across platforms and be able to use on my desktop. I also appreciate them keeping the old version around, since that is my preferred app and will use it until my phone no longer supports it.



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.


Spent time getting templates....lost after update


Sticking with the tried-and-true original version (together with the DEWALT tools app). At a minimum, I don’t lose templates I spent about an hour researching and downloading to my device’s library for use only to find them gone after an update, and MOST IMPORTANTLY, I don’t have to manage just one more use a calculator!

Yep, stick with the old version. Too many software companies push online accounts and subscription models to use a good (or more correctly ‘what was’ good) apps. Instead, innovate and release stellar updates over a 6-18 month timeframe and I’ll gladly pay you another few bucks. I’m sure others would as well.


Infinity Softworks, Inc.
7.4 MB
Requires iOS 11.0 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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