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 5.0.3

I looked in our account Thursday as we prepared to ship a big update and saw only one crash report. Hmm, I thought, that's interesting. Hadn't seen that crash before and no customers had emailed. Since I couldn't reproduce it with the info provided I moved on, releasing the app.

Of course a couple of hours later I heard from a customer. And then today another couple reported it.

When it rains it pours. No one all week then three in less than 24 hours.

The (sole?) crashing bug is fixed now. Once this release is approved, I'll activate the currency conversion template again. Sorry to all impacted. And a special thanks to those who reported the issue and helped us track it down!

- Elia Freedman

Customer Reviews

4.1 out of 5

14 Ratings

14 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.

Great calculator but the original is still the bes

Pheland L

I am long time fan of the calculator and use it all the time. The most recent update seemed very nice at first. I like the colors and grouping pics better than the previous version. However, it is much more cumbersome and more complicated to organize. ie, It’s hard to put the calculators I most often use in the order I want. Also, the equal/solve button is on the left side now. That’s great if your a “leftie” or have a long long thumb it’s too hard to reach if your doing one handed calculations with an iPhone “plus” model with the right hand. Good support though.

Great calculator but busy/complex interface


I am a long time user for powerone. Clear that you have a made a powerful calculator, but i suggest rethinking your basic calculator interface. Use case for me at least is 80-90 percent simple, 1 to 3 steps. The calculator face has all history and memory on 1 page. Overkill for me. I would like to see a simple rpn calculator similar in design to Apple standard with more lines, use separate screen for templates. Thank you

Developer Response

Thanks for the constructive feedback, Profjlap213. I'm curious if you've tried the landscape calculator on your iPhone? Much simpler calculator presentation. Either way, I'll make sure your comments are considered as we make improvements in the future. - Elia


Infinity Softworks, Inc.
6.4 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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