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Calculi: Scientific Calculator 4+
Unit & Currency Conversion
Michael Natole, Jr.
Designed for iPad
-
- Free
- Offers In-App Purchases
Screenshots
Description
Calculators can be hard to use. Calculi plans to change all that.
SIMPLE BUT POWERFUL
Calculi is a smart calculator that is simple and easy to use, but with advanced features for power users. Whether you are trying to balance your checkbook or taking an advanced math class, this app will help you with all of your calculating needs.
CALCULATE ANYTHING
Calculi doesn’t just add two numbers together but can solve complex expressions using the order of operations. The multi-line display allows for small or large expressions. So go ahead and calculate anything and everything! Press the 2nd button to reveal more scientific functions.
UNIT CONVERSION
You can easily convert any of your calculations to a different unit across 17 categories such as length, area, and volume. Unit conversions are saved to your calculation history for easy review. A Calculi Pro subscription is required for this feature.
CURRENCY CONVERSION
Traveling abroad? Not sure how much your lunch costs? Calculi has you covered with support for over 30 different currencies around the globe (data is updated daily from the European Central Bank). A Calculi Pro subscription is required for this feature.
CONSTANTS
Common constants from both mathematical and scientific fields (astronomical, chemical, electromagnetic, etc.) are included for use in calculations.
DESIGNED WITH iOS 18 AND iPadOS 18 IN MIND
Calculi adapts to all the latest iOS and iPadOS devices. Even better, multitasking and multi-window support is available in all orientations on the iPad. Interactive widgets are included for calculations on your home screen, and Control Center widgets provide quick access. You can have Calculi wherever you need it.
GESTURES
Gestures are fun. So why not?
- Long press the delete button to clear the display
- Long press the equals button to use the previous result or expression
- Long press the display to copy, paste, or share
- Long press any calculation item to reuse the expression or result
SUPERCHARGED HISTORY TAPE
Calculations from the history tape can be bookmarked for later and notes can be added for additional context. You can search across notes, expressions, and answers to find the calculation that you are looking for.
GET SHARING
Don’t be selfish. This history tape can be shared either as a single thread or the entire tape using numerous methods such as email, messaging, or print. There is also an iMessage app so you can easily send calculations.
CALCULATE ON YOUR WRIST
Calculi is also available on Apple Watch! Besides a four-function calculator, you will also find a tip calculator and counter.
EXTERNAL KEYBOARD AND TRACKPAD SUPPORT
Pair an external keyboard or trackpad to gain access to powerful shortcuts and full cursor support. You can hold down the command key on your keyboard to view all the available shortcuts.
Finally, if you enjoyed Calculi, please take some time to leave a review. Feedback is always appreciated for future updates.
CALCULI PRO
This yearly subscription grants you access to the following:
- Unit Conversions
- Currency Conversions
- App Themes
- Colorful custom icons
TIP JAR
If you enjoy using the app and want to support an independent app developer, please consider sending a tip.
Subscription Details
– Payment will be charged to iTunes Account at confirmation of purchase
– Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period
– Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal
– Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user’s Account Settings after purchase
Terms of Use: https://www.calculiapp.com/terms.html
Privacy Policy: https://www.calculiapp.com/privacy-policy.html
What’s New
Version 4.4
This new release for Calculi contains the following new features and improvements:
- A revamped calculation history that allows you to add notes, bookmarks, and search calculations.
- Updated home screen widgets to support light, dark, and tinted modes.
- New large scientific calculator widget on iPadOS.
- Control Center widget for quick access to Calculi.
- Updated light, dark, and tinted icons support.
- Support for iOS 18, iPadOS 18, and watchOS 11.
- Removed ads.
- Other bug fixes and improvements.
Ratings and Reviews
WAY better than the stock iPhone calculator!
This calculator app blows the built in iPhone one OUT OF THE WATER!!! (iPhone 11). For me at least it’s better in many ways, one of the most important of which is the history screen including the functions of bringing past answers & expressions into your current operation. Also, despite it’s age the author regularly drops helpful updates. This is coming from someone who generally, highly prefers native apps over 3rd party ones.
Almost Perfect
This is dang near perfect: works with a keyboard! Works in Split Screen! No ads! Data not linked to your identity! History tape, keyboard shortcuts, shareable history… seriously, almost everything I want. There’s just one thing that makes it impossible for me to use: It doesn’t work in Slide Over. You can use the calculator itself in Slide Over, or you can view and share the history, but you can’t do both. Once you view the history, there’s no way to get back to the calculator in Slide Over, you must change to Split Screen, or close and re-open the app, that kind of thing. If this app ever gets Slide Over fixed, I will certainly download it again and definitely update my review. Until then, might as well delete it and keep using the calculator on my iPhone while working on the iPad. For what I’m looking for, this app is unusable.
UPDATE: This app is working perfectly now! I love it! The developer fixed it in the latest update, and I can confirm that now it works in Slide Over. It went from being unusable to being exactly what I want. Seriously, if I had the talent to be able to develop apps, this is what I would make—it checks all the boxes for me. I don’t need scientific functions or anything fancy, but I do need a history tape. I really like the tape in this app, because each equation has it’s own “bubble” in the history tape window, which makes recognizing each one simple. I kind of can’t wait for my friends to ask me if I use a calculator app on my iPad, so I can recommend Calculi to them and tell them about all the reasons they’re going to love it, too.
Developer Response ,
Thank you for your valuable feedback. The issue that you described has been fixed in the latest update. If you would so kind as to re-evaluate your review that would be most appreciated.
It calculates, but the history is buggy
When I open the app and make a calculation, it does not appear in the history. If I go back to the home screen and then return to the app, my previous calculation now shows. When I do the next calculation, it replaces the info in the top tile instead of adding a tile. On the next calculation, things start working as they should. This is the pattern every time I clear the history.
I would give this app 5 stars if not for the buggy history. Without that feature it is a decent calculator, but then it is just a calculator. Please fix it for a great app!
App Privacy
The developer, Michael Natole, Jr., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Diagnostics
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Information
- Seller
- Michael Natole, Jr.
- Size
- 37.9 MB
- Category
- Utilities
- Compatibility
-
- iPhone
- Requires iOS 17.6 or later.
- iPad
- Requires iPadOS 17.6 or later.
- Mac
- Requires macOS 14.6 or later and a Mac with Apple M1 chip or later.
- Apple TV
- Requires tvOS 16.0 or later.
- Apple Watch
- Requires watchOS 10.0 or later.
- Languages
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English
- Age Rating
- 4+
- Copyright
- © 2024 Michael Natole, Jr.
- Price
- Free
- In-App Purchases
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- Calculi Pro $2.99
- Large Tip $4.99
- Medium Tip $2.99
- Small Tip $0.99