Download hundreds of calculations or create your own with PowerOne® calculator.

• Several-time Apple staff pick + Best of 2010
• "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. Enter the data you know. PowerOne will calculate the rest.

• For those one-off calculation needs, PowerOne provides a powerful standard and RPN calculator. Over a hundred functions to help with virtually anything: basic math, powers, logs, trigonometry, probability, programmer’s math, fractions, and Imperial and metric units.

• Get up and running fast with hundreds of pre-created templates in PowerOne's extensive library. Covers everything: finance, conversions, real estate, business, investing, construction, engineering, health, fitness, and more.

• 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 using our intuitive language. You, your team, and your customers can perform their own calculations without ever having to think about the math.

• 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.

• Highly customizable. Go beyond templates with expanded calculator functions and themes! Match your mood and make it the product you want to use every day.


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
• Run PowerOne online at
• Full-featured standard and RPN calculator (iOS only)
• Access to over 200 library templates
• Sample creating your own templates
• Share template results via email
• Go light or dark with your choice of two themes
• Keep your devices in sync automatically


• Over 300 library templates
• Create your own templates without limit
• Share templates with other Premium subscribers
• Access any of the built-in extensions to share or save your results
• Choose from 12 themes to customize PowerOne
• Support independent iOS developers and your favorite calculator's development!


PowerOne is free to use with some features available via monthly or annual subscription. Payment will be charged to your iTunes account at confirmation of purchase and your subscription will automatically renew unless auto-renew is disabled at least 24 hours before the end of the current subscription period. Automatic renewals will be charged at the same price you were originally charged for the subscription. Please note that subscriptions can be managed by choosing that option via Account within PowerOne or via Account Settings on the App Store after purchase.

Privacy Policy:

What’s New

Version 6.1.2

- New templates in the library!

- Tapping a link to another template already on the device now opens it directly
- Fixed a search issue when % symbol used
- Fixed an issue where default tags were ignored
- Fixed an issue where importing a template failed when version 4 comments were in multiple rows simultaneously
- Fixed an issue linking website and app when tapping a template url
- Other bug fixes and improvements

More details available at Find something? Please tell us:

Ratings and Reviews

4.8 out of 5
141 Ratings
141 Ratings
Finally-A-Great-App ,

Great app

I’ve been using PowerOne for many years now. I was in need of a good RPN calculator and liked their version 4 design. So I took a good look at the rest of the app and discovered the templates. What a discovery it turned out to be too. I’ve spent a lot of time and money on programmable calculators over the years and never found any that worked out. Until now, PowerOne is the definition of programmable, customizable what ever you want to call it. It’s just a lot fun to play around with and when you are done playing you have a powerful tool with you. It is too bad PowerOne is stuck in the calculator section of the App Store. It’s so much more than just a calculator. Although it does have a great calculator. However that’s just a small part of what PowerOne really is.

In Version 6 they brought back Version 4’s interface which was very easy to use and Version 6 is a lot easier to program than Version 4 was, so now we have the best of both versions.

I never had a problem with the login. Because I know what I’m getting in return. Things only a login can provide, syncing across all my devices, and a web based editor. Plus there are things coming in future versions I don’t even know about yet.

Pricing, I don’t understand how you can make money at a 1 time 5 dollar fee. It turns out you can’t. So if we want to keep using PowerOne the developer needs to get paid. The complainers have no idea of what they have. I do, and I’m willing to pay for it.

Beny! ,

Great app! Always making it better... but... there’s the minus “-“ quirk

This is by far the best calculator app there is. Plus the versatility. But, there are always few little things and bugs to squash. There is an annoying thing about how it works after a result shows, if you press the “+” or the “*”, “/“ it will, obviously, invoque the “last” result plus the new operator pressed and it will let you continue with the operation, as expected, but if you press the “-“ it won’t apply that to the “last” but will start as a new operation. The other thing is that when you open a menu it constantly changes its height to accommodate the content. It cool, but it annoys the eye, but in this case, maybe it is just me. But trust me, this is the one and only calculator to have!

Developer Response ,

Hi Beny!

Thanks for the generally positive review. I did want to make sure you knew, though: the minus sign not invoking chain calculations is a known bug and will be fixed in the 6.1 release coming soon.


GQMGlass ,

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.

Developer Response ,

Hi GQMGlass,

Thanks for the positive review! For anyone reading your comments, I want to point out that PowerOne 6 does not require you to create an account. It creates an anonymous account for you automatically and offers the ability to switch to an identified account if desired.



Infinity Softworks, Inc.
8.7 MB

Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
© 1998-2019 Infinity Softworks, Inc.
In-App Purchases
  1. Annual Premium Subscription $19.99
  2. Monthly Premium Subscription $2.99


  • Family Sharing

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

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