PowerOne calculator

PowerOne calculator

Finance, scientific, and more

803 ratings
101 reviews
Free
In-App Purchases

Details

  • Released
  • Updated
  • February 12, 2018
  • August 13, 2025

Features

PowerOne calculator screenshot #1 for iPhone
PowerOne calculator screenshot #2 for iPhone
PowerOne calculator screenshot #3 for iPhone
PowerOne calculator screenshot #4 for iPhone
PowerOne calculator screenshot #5 for iPhone
PowerOne calculator screenshot #6 for iPhone
iphone
ipad
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About

This app offers a powerful calculator with hundreds of pre-built templates for finance, engineering, and more. Users can also create custom calculations for specific needs, ensuring accuracy and speed for repetitive tasks. Access your calculations across devices, online or offline.

Hundreds of pre-built calculation templates
Create custom calculation templates
Standard and RPN calculator modes
Cross-device syncing (iPhone, iPad, Mac, Web)
Offline access
Template sharing for teams
Customizable themes
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What users say

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What's New in PowerOne calculator

6.4.6

August 13, 2025

Maintenance release and bug fixes, including resolving crash when creating templates. Also sharing results now adds row numbers to tables and some other behind the scenes improvements.

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Subscription plans

Annual Premium Subscription

Unlock all Premium features, renews annually

$19.991 Year
How to cancel PowerOne calculator subscription ⁉️

User reviews

Greedy

I’ve had the earlier version of this on my iPad for years. I’ve written dozens of templates for custom applications I used in the office. I was aware that they were no longer supporting it, but when I had to restore my iPad, it couldn’t download the app because they took it off the server. That’s the Apple server, the App Store.
And all this because they weren’t charging for the first one and discovered that they could charge for the second one. They’re lame excuse “due to a massive server, crash“ was such a cop out. I’m a programmer and you know exactly how these things work. It’s a total cop out and now I’ve lost a good calculator.
I would gladly pay a flat fee for the original version to be able to restore all the templates I have written.
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Response from developer

Hi Namaste122112, I discontinued PowerOne Finance Pro, Scientific Pro and the free versions in 2018. Unfortunately they no longer function on Apple’s latest OS version, but my latest version, PowerOne 6, does and is available here: https://power.one/ios Fundamentally the templates are the same. (Tap + at the top of the list then Add from Library to add any templates you are interested in.) The calculator is now available from all screens and offers a lot more customization options. Also, if you have PowerOne on multiple devices and signed into the same account, all of your templates and calculations will sync. I promised to provide the same functionality as you previously had so you didn’t lose anything in the process. This used to be automatic but with the old app no longer functioning I can only add these for those who write in. With that and once you install, run and tap Get Started, tap ••• in the top, right corner of the list then Account and send me the anonymous email address listed. I can add free template creation and premium templates. Other items will still be available for subscription if you so choose. If you have access to the old version on your old iPad or exported your templates for safe keeping, I’m happy to help you move those to the new version as well. Please email if you would like my help. Elia hello@thecraftyweasel.com

Terrible

Payed for a yearly subscription and when i go to use it ,nothing works,just asks if i want to pay for subscription

Miss old app!

PLEASE READ THIS,
The old app was way nicer! So handy to flip back and forth from loan to savings.
History was better. Displayed on calculator screen. Now it’s not and when you go to history it’s a nightmare to read it.
New version is just BAD.
I would pay to get old version back!

Update on “Wipes Out All My Library”

The dev got back to me with an easy fix involving logging out & back in on my other device. It’s now a great app again with all my library intact! One of my most useful apps because I like to write my own single-purpose calculator mini-apps. Example: What percent of 283 is 47?

Response from developer

Hi tomtrevorrow, Happy to help. There could be a couple of possibilities here, but one of the reasons I built version 6 (the current version) is so we can sync your templates across devices and thus make sure they weren’t lost on a device failure. Were you using PowerOne 6 or an earlier version? Did you move to a new phone and have to log in again/create a new account? Or maybe you were on an earlier version of the app? Whatever the case please email me directly and I will do my best to help. Elia hello@thecraftyweasel.com

Good program great service

I have used this program for years now. The application has multiple benefits. The customer service has also shown to be quite helpful in the chance of issues that may arise.

User experience

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Reported Bugs

4 issues

Calculator not accessible after update

Bug

Templates disappearing after update

Bug

Incompatibility with iOS 16

Bug

Calculation errors in certain templates

Bug

Requested Features

4 requests

Landscape mode support

Feature

Ability to reorganize templates

Feature

Restore previous version's interface

Feature

Retain access to purchased features

Feature

FAQ

What does the PowerOne calculator app do?

PowerOne is a powerful calculator app that offers hundreds of pre-built templates for various needs like finance, engineering, and conversions. It also allows users to create their own custom calculations, ensuring accuracy and speed for repetitive tasks. The app is accessible across multiple devices, both online and offline.

What are the key features of PowerOne?

Key features include access to hundreds of pre-created templates covering finance, real estate, engineering, and more. Users can also create their own custom templates using an intuitive language. It offers standard and RPN calculator modes, cross-device syncing, and offline functionality. Template sharing with teams is also supported.

Is PowerOne calculator free to use?

The app is available for free, offering core functionalities like offline use on iPhone, iPad, and Mac, access to over 200 library templates, and the ability to sample creating your own templates. Premium features are available for purchase.

What devices is PowerOne calculator compatible with?

PowerOne calculator is available on iPhone, iPad, and M1 Mac. It can also be accessed online via a web browser at https://power.one, making it accessible across various platforms and devices.

How can I use PowerOne for my business?

PowerOne is highly beneficial for businesses by allowing the creation of custom templates that ensure error-free calculations for specific business needs. These templates can be shared with team members and customers, standardizing calculations and improving efficiency. The app's accuracy and speed are particularly useful for repetitive financial and operational calculations.