Comparison

Calculator Max vs PowerOne calculator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Calculator Max

This app offers a comprehensive suite of calculation tools, from basic arithmetic to advanced scientific functions. It features a history tape for easy access and reuse of entries, and a unique scribble pad for handwritten notes and equation solving on iPads. Enjoy a clean interface, multitasking support, and customizable themes.

Highlights
  • Basic and scientific calculators
  • History tape with export options
  • Handwritten notes and equation solving
  • Multitasking support on iPad
  • Customizable themes and app icons
  • Home Screen and Lock Screen widgets
Features
Read full description

Calculator Max makes both simple and complex calculations easy. It offers all calculators you’ll ever need in one carefully designed, uncluttered and easy-to-use package. Switching between calculators is buttery-smooth and natural. The basic calculator with big buttons swiftly handles everyday tasks. The more advanced scientific calculator is loaded with all important mathematical functions and constants. A history tape with your entries is comfortably accessible in all calculator modes. Thanks to it, you never lose track of what you’ve entered and the entries can be reused effortlessly in your calculations. The tape can also be exported to common formats and shared or printed. On the large screen of any iPad it is pure joy to make handwriting notes or draw your ideas right in the app. Write down any math equation and let the app calculate it for you in the blink of an eye. Or reuse any handwriting which you can easily convert to editable text. ————————— WHAT YOU GET ————————— /// POWERFUL CALCULATOR /// — Basic calculator with big buttons — Scientific calculator packed with functions and constants — History tape with the calculations at your fingertips in all modes — Extensive rounding options (e.g. two decimal places for accounting) — Up to 5 memory slots for frequent numbers — Plain Text, Monospaced Text, CSV, PDF and image export formats — Advanced export, share and print options — Scribble Pad on iPad for easy math equations solving, handwritten notes and sketches /// PRODUCTIVE WORKFLOW /// — Side tape layouts for easier long records handling — Clean and uncluttered interface with refined haptic feedback — Multitasking support on iPad for side-by-side work — External keyboard support for even faster input and app control — Universal app for all your iPhones, iPads and Macs — User interface precisely adapted for each device capabilities /// FAST ACCESS /// — Home Screen widgets with last calculations and memory — Widgets for direct access from the Lock Screen — Control Center and Lock Screen fast access buttons /// MIGHTY SCRIBBLE PAD /// — The right place for your quick notes and sketches — Easily calculates any written down math equation — Recognizes your handwriting and converts it to editable text — Fully-fledged notebook with unlimited number of paper sheets — Exportable as text, image or PDF — Optimized for your finger as well as Apple Pencil — Support for LAMY and Adonit styluses (on iPad) — Available on all iPad models /// EXTENSIVE CUSTOMIZATION /// — Handcrafted design themes with dark mode support — Loads of app icons you can easily choose from the best one for your Homescreen — Carefully selected sound sets Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

PowerOne calculator

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.

Highlights
  • 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
Features
Read full description

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 BENEFITS/FEATURES • 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, on your M1 Mac, 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 25 years and over 30 million software calculators distributed, PowerOne has earned its reputation for high-quality apps. We'd love to hear from you. Please visit us at https://power.one, or share ideas, get help, and resolve problems by emailing us at help@power.one. PRIVACY PowerOne uses anonymous accounts so we don't know who you are but still provide great benefits such as syncing across devices. AVAILABLE FOR FREE • Run PowerOne offline on your iPhone, iPad or M1 Mac • Run PowerOne online at https://power.one • 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 AVAILABLE IN PREMIUM • 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! SUBSCRIPTION DETAILS 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. Terms: https://power.one/terms Privacy Policy: https://power.one/privacy

Screenshots

Calculator Max4 screens
PowerOne calculator4 screens

Verdict

The call

The clearest difference is rating: PowerOne calculator at 4.6 against Calculator Max's 4.3. Calculator Max's advantage is device support (4 vs 2) and iOS requirement (15.0 vs 17.6). On price, review sentiment, ratings volume and update cadence there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Calculator Max sells 2 in-app purchases, starting at $4.99 per year and PowerOne calculator sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

PowerOne calculator holds the better App Store score, 4.6 against 4.3. Both are backed by a comparable volume of ratings — 1.9K and 806 respectively. Written reviews complicate that: 55% of Calculator Max's written reviews are positive against 50% of PowerOne calculator's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Calculator Max ships an update every 2 months, PowerOne calculator every 3 months. The most recent releases landed on October 22, 2026 and October 26, 2026 respectively.

Scorecard3 real differences · 7 level
Calculator Max versus PowerOne calculator: the parameters behind the verdict, then further details
ParameterCalculator MaxPowerOne calculator
PriceFreeFree
Rating4.3 (1.9K ratings)4.6 (806 ratings) — better
Positive reviews55.1% of reviews — better50.5% of reviews
Number of ratings1.9K — better806
Update frequencyEvery 2 months — betterEvery 3 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad
Requires iOS15.0 — better17.6
Further details — not scored
Size126 MB6 MB
Age rating4+4+
DeveloperPavel KozarekCrafty Weasel, LLC

Customer experience

Calculator Max

All ratings1,651 ratings
Positive82.0%
Neutral2.8%
Negative15.2%
Written reviews292 reviews
Positive55.1%
Neutral3.4%
Negative41.4%

PowerOne calculator

All ratings803 ratings
Positive91.9%
Neutral1.7%
Negative6.4%
Written reviews103 reviews
Positive50.5%
Neutral5.8%
Negative43.7%

User reviews

Calculator Max

From 1.9K App Store ratings

What we love

  • 🚀 Easy to use
  • 📝 Useful note-taking feature
  • 💾 Tape/history feature
  • 👍 Clean and intuitive interface
  • 🎨 Customizable appearance

Room to improve

  • 🐛 Compatibility issues with newer iOS versions
  • 📤 Lack of export/sharing options for tape/history
  • 🔍 Difficulty finding settings
  • 🔀 Sensitive orientation switching

PowerOne calculator

From 806 App Store ratings

What we love

  • 🚀 Powerful and versatile calculator
  • 👍 Extensive template library
  • 🚀 Customizable keyboard and layout
  • 👍 Helpful customer support
  • 🚀 Syncing across devices

Room to improve

  • 🔒 Requires account login
  • 👎 Subscription pricing model
  • 👎 Cluttered and less user-friendly interface
  • 👎 Removed features from previous versions
  • 🐛 Bugs and glitches

Bugs and requests

Calculator Max

Reported bugs

3 issues
  • Crashes after iOS 26 update
  • Tape not visible/functional on iPhone
  • Calculator buttons/layout issues in split-screen mode

Requested features

5 requests
  • Left-handed mode
  • Backspace/edit functionality
  • Scientific calculator mode with tape
  • Tape annotation/labeling
  • Cloud/Dropbox sync for tape

PowerOne calculator

Reported bugs

4 issues
  • Calculator not accessible after update
  • Templates disappearing after update
  • Incompatibility with iOS 16
  • Calculation errors in certain templates

Requested features

4 requests
  • Landscape mode support
  • Ability to reorganize templates
  • Restore previous version's interface
  • Retain access to purchased features

In-app purchases

2 purchases

Calculator Max

Subscriptions1
  • Calculator Max Pro7 Days trial$4.991 Year
One-time1
  • Calculator Max Pro$3.99
2 purchases

PowerOne calculator

Subscriptions2
  • Monthly Premium Subscription$2.991 Month
  • Annual Premium Subscription$19.991 Year

Questions

Is Calculator Max free?
Calculator Max is free to download, with in-app purchases available.
Is PowerOne calculator free?
PowerOne calculator is free to download, with in-app purchases available.
Which has better reviews, Calculator Max or PowerOne calculator?
PowerOne calculator is rated higher. Calculator Max averages 4.3 out of 5 from 1.9K ratings, while PowerOne calculator averages 4.6 from 806 ratings.
Do Calculator Max or PowerOne calculator have ads?
Neither Calculator Max nor PowerOne calculator shows ads.
Which is updated more often, Calculator Max or PowerOne calculator?
Calculator Max ships an update every 2 months, and PowerOne calculator every 3 months. Most recently, Calculator Max was updated on October 22, 2026 and PowerOne calculator on October 26, 2026.

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