Welcome to Calculator 3.0 for Apple Watch, iPhone, iPad, and iMessage!

Frustrated with the ugly and complicated Calculators for iPad, Apple Watch, and Apple TV — Calculator 3.0 was created to provide a better simpler choice....all for Free.

The "Original Calculator with Themes for iPad and Apple Watch" is back — Rewritten and redesigned for Apple Watch, iPhone, iPad, and iMessage with Bolder Fonts, iPad Multitasking, Native Watch Support with Complications, and Snappier Performance.

Apple Watch
The Apple Watch Calculator with Colored Watch Band Themes!
Designed for the mobile mathematician with a Scientific Calculator, Tip Calculator, Unit Converter, a Tally Counter, Twenty-Six personalized colored themes for your watch band or style, and...
• Force Press (firmly press) on the Calculator to changes themes
• Big and bold fonts for readability
• Haptic feedback upon button presses
• Watch Face Complication support for quick access
• Tip Calculator with Digital Crown support
• Conversion Calculator with Length, Weight, Volume, Area, and Time units
• Counter, Tap to increase or use the Digital Crown for faster input, force press for options
• Settings, with option to enable Counter number modular face complication support
• Autorotation to Share, when enabled the app rotates when rotating your wrist to show a calculation, tip percentage, unit conversion, or tally number to another person

iPhone and iPad
• Simple bubble dark interface with Scientific Calculator
• iPad Multitasking Support (Landscape and Portrait)
• Haptic feedback upon button presses (iPhone 7 and greater)
• Gesture Controls, Swipe Up for "Light Mode", Swipe Down for "Dark Mode", Swipe Left to clear the displayed number
• 3D Touch Icon — Copy Last Number (iPhone 6s and greater)
• Bolder fonts
• Tap number to copy
• "Drag and Drop" support for iPad, perfect for the new iPad Multitasking in iOS 11
- Tap and hold on the displayed number to select for dragging as text into another app
- Drag and Drop text numbers from other apps (Mail, Safari, Notes, etc) over the displayed number area to include the number in the current input

iMessage app
• Simple Calculator
• Tap number to paste into message thread

What's New

Version 3.22

• Minor UI Tweaks
• Updated App Store screenshots for iPhone X

Happy Holidays and Calculating :)

Ratings and Reviews

4.7 out of 5

710 Ratings

710 Ratings

Supports iPad, iPhone & Apple Watch, Tips payment!


I have seen too many competitors that don’t offer an Apple Watch companion app and those that did wanted a monthly subscription for “technical support” issues...for a calculator app? Why do I need multiple themes and technical support for simple calculations on my devices?

It is a shame that we have gotten to iOS 11 and there is still no native Calculator from Apple on even the iPad Pro! I doubt a native app for the Apple Watch will ever see the light. I use this device for work and must quickly add simple and moderately complex math on the fly. Until that day comes, this app will definitely do the trick!

I am a huge fan that the Split View and new Dock, Drag & Drop features with with this app! A simple swipe up to change between light mode and dark mode was clever! My favorite feature, no ads or monthly subscription required! For this I tipped the maximum because I really, really believe this app was done right!

I agree with another reviewer that I would have paid for this app, but maybe the tip feature is a better go. I imagine if the developer keeps adding new and useful features that I really enjoy, I would keep tipping! 😊

Developer Response

Thank you for the Review and Tip. Great to hear you enjoy the app! Reviews ensure I keep the app updated with the goal of providing all users no matter their device a simple easy to use scientific calculator. (No ads, 100 themes, weird fonts, or hidden purchases). Until Apple provides a calculator for iPad, Apple Watch and Apple TV — Calculator 3.0 will be here.

Woulda paid for it!


For Apple watch this blows all the other ones out of the water. You can tell this one was made for the Apple watch not quickly put together like others available. The amount of themes/colors, the quick tip calculator, converter, tally counting. No other calculator has this 🙏

Very helpful

Nebr. Judy

I love this app. Works great on my watch. It has many useful functions. I’ve used them all. The counter works great. Tip calculator also divides the tab for the number of people. The converter is handy too. Get it. It looks great also.


Spencer Brown
32 MB
Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch. Apple TV.
Age Rating
Rated 4+
© 2018 Spencer Brown
In-App Purchases
  1. a Nice Tip $0.99
  2. an Amazing Tip! $4.99
  3. a Generous Tip $2.99


  • Family Sharing

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

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