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

• 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.

• The everything calculator. 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

- Syncing for all! This release adds syncing and access to the web version for everyone — even those of you who prefer to remain anonymous — available at!
- New template creation tutorial: Steps through template basics and various settings. And of course, it can be skipped if you already know what you’re doing.
- Template creation: Includes a completely new editor, significantly improving the template creation process on iOS.
- Complete rethink of sync plumbing: We’ve made it more stable long-term. Hopefully you won't notice any differences!
- Improvements to account creation: Easily move between a named and anonymous account, access to web version with an anonymous account, change your email and/or password, and more.
- Subscriptions: While most of PowerOne is free, choose between monthly and annual subscriptions to access premium templates, template creation, advanced sharing, and extra themes. Please support PowerOne development. Subscribe today!
- Web improvements to match iOS changes.
- iOS 12.1 compatibility for the new iPads Pro.

Bug Fixes:
- Fixed a bug where subtract and power would not automatically continue calculations in the calculator (standard input mode).
- Fixed a bug where using PowerOne with a physical keyboard could cause the keyboard to stop responding to input after the first modified row.
- Other fixes and stability improvements.

Please send any feature requests, found bugs, or general thoughts to We'd love to hear from you!

Ratings and Reviews

4.4 out of 5
25 Ratings
25 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.


boboq ,

The best!

I’ve used PowerOne calculator since I owned a Handspring Visor in the early 2000s. I was excited when PowerOne was ported to iOS and have been impressed and pleased with the evolution of the app on iOS. I have to admit that I had to take a bit of time to get used to the changes in this version. However, as an old codger, I have come to realize that it is necessary to adapt to change. I think users will discover the power (no pun intended) of this app as they use it. With templates, you can do virtually anything.


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.

More By This Developer

You May Also Like