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Calculi: Scientific Calculator

Calculi: Scientific Calculator

Unit & Currency Conversion

383 ratings
39 reviews
🔧 Utilities
📊 Productivity
Free
In-App Purchases

Details

Released
July 30, 2011
Updated
March 4, 2025

Features

Developer

Michael Natole, Jr.
✨Promote your app ✨
Calculi: Scientific Calculator screenshot #1 for iPhone
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Calculi: Scientific Calculator screenshot #9 for iPhone
iphone
ipad
watch
appletv
🧾$0.99 - $4.99
In-App Purchase↘︎
📌Ready
Reviews summary↘︎
⭐39
Reviews↘︎
📝2+ tags
Tags↘︎
🔄6+ apps
Alternatives↘︎
❓5 answered
FAQ↘︎
📦w/o updates
Updates frequency↘︎
🖼️Get Icon
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About

A smart and powerful calculator designed for ease of use, offering advanced scientific functions, unit and currency conversion, and a supercharged history tape. It adapts to various devices and supports external keyboards for enhanced functionality.

✓Complex expression solving
✓Unit conversion (17 categories)
✓Currency conversion (30+ currencies)
✓Scientific constants
✓Supercharged history tape
✓iMessage app integration
✓Apple Watch app
Show original description

What users say about Calculi

Reviews of Calculi are mixed: the Utilities app is rated 4.4/5 from 383 App Store ratings. What users like most: better than stock iPhone calculator, history screen with past answers/expressions. Top complaints: pop-up rating requests, added ads in updates. Summarized from real user reviews.

Positive things

  • 👍Better than stock iPhone calculator
  • 📈History screen with past answers/expressions
  • 🔄Regular helpful updates
  • ⌨️Works with keyboard
  • 🗂️Works in Split Screen
  • 🚫No ads (historically)
  • ℹ️Data not linked to identity
  • 📝Shareable history
  • 🎨Great UI design
  • 💨Lightweight, no bloatware
  • 🖼️History tape with distinct bubbles

Negative things

  • ⚠️Pop-up rating requests
  • 💸Added ads in updates
  • 🎛️Clutter of unused keys on iPad
  • 🐛Buggy history feature
  • 💥Crashes during multiplication
  • ⌨️Physical iPad keyboard not working
  • 🇨🇳Chinese review: trash
  • 🚫Doesn't work on older iOS versions
  • ❌Calculation errors (e.g., 9x9)
  • 튕튕Closes immediately on iPad iOS 13
  • 🚫Doesn't work in Slide Over (historically)
See all reviews

What's New in Calculi

4.4.1

March 4, 2025

This update includes a customer center to manage your Calculi Pro subscription.

4

Subscriptions & In-App Purchases

Calculi Pro

Calculi Pro

$2.991 Year
3 Days trial
How to cancel Calculi subscription ⁉️

User reviews

Most RecentHighest RatedLowest Rated

Ok

Ok
PPé93

Très bien

Très bonne Calculatrice simple et complète
TThomacos

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.
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TATHE BEST iPhone clac app!

広告の内容が最悪

なんで電卓アプリに大人のおもちゃ広告なんだ？
Kken11a

No me dejó hacer cálculos hasta escribir una reseña

No me dejaba escribir
ECescalera al cielo
See 34 more reviews

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User experience

🐞

Reported Bugs

7 issues

Calculation not appearing in history until app restart

Bug

New calculation replaces previous in history tile

Bug

Crashes when multiplying by 1.03

Bug

Physical iPad keyboard not recognized

Bug

App crashes/closes on iPad iOS 13

Bug

App launches then closes immediately on iOS 13

Bug

Cannot calculate simple equations like 9x9

Bug
✨

Requested Features

3 requests

Option for Dark Mode all the time

Feature

Option to choose icons

Feature

Fix Slide Over functionality

Feature

FAQ

What does Calculi do?

Calculi is a smart calculator that simplifies complex calculations. It offers advanced scientific functions, allows for solving complex expressions using the order of operations, and provides a multi-line display for large inputs. It also includes features like unit and currency conversion, constants, and a history tape.

What are the key features of Calculi?

Key features include the ability to solve complex expressions, unit conversion across 17 categories, currency conversion for over 30 currencies, access to scientific constants, a supercharged history tape with bookmarking and notes, and integration with iMessage and Apple Watch. It also supports gestures and external keyboards.

How much does Calculi cost?

The base Calculi app is free to download and use for its core calculator functions. However, advanced features like unit conversion and currency conversion require a Calculi Pro subscription. Specific pricing details for the subscription can be found within the app.

What devices is Calculi compatible with?

Calculi is designed with iOS and iPadOS in mind and adapts to all the latest devices. It offers multitasking and multi-window support on iPad, interactive home screen widgets, and Control Center widgets for quick access. It is also available as an app for Apple Watch.

What are common use cases for Calculi?

Common use cases include balancing checkbooks, solving problems in advanced math classes, converting units for measurements (like length or area), converting currencies while traveling, and using scientific constants in calculations. Its history tape also allows for easy review and sharing of past calculations.