Best apps like Calccis

10+ similar apps compared and reviewed

4.5 avg rating

10 free apps

Updated October 2026

Jukka Aittola

Looking for something like Calccis? We've analyzed 10+ similar apps to help you find the best alternative. Each app is compared by ratings, features, and real user reviews, so you can make the right choice.

Top Alternatives to Calccis

SwiftRPN by Patrick Gelvin

Editor's Choice

🔧 Utilities

0.0(0 ratings)

Free

Calculator for Complex Field by Jongseung Park

Everyday + professional uses

Strong Contender

🔧 Utilities

5.0(4 ratings)

Free

Calculator for Complex Field screenshot 1

Calculator for Complex Field screenshot 2

Calculator for Complex Field screenshot 3

Calculator for Complex Field screenshot 4

Calculator for Complex Field screenshot 5

Calculator for Complex Field screenshot 6

Input natural math expressions and get instant results on a separate line, allowing for easy revisions. Save up to 20 inputs and incorporate saved answers into new expressions. Supports complex field calculations with adjustable decimal digits and three output formats.

ThetaCalc by Felix Stehli

Worth Considering

🔧 Utilities

4.3(4 ratings)

Free

This utility app provides a Reverse Polish Notation (RPN) calculator. Users can extend its functionality by programming custom functions and equations using JavaScript.

More apps like Calccis

RLM-10CX

Scientific Calculator

Free

This scientific calculator offers a comprehensive suite of tools for finance, business, statistics, and complex scientific calculations. It emulates a classic calculator while leveraging modern iOS device capabilities for ease of use and advanced functions.

Finance and Business calculationsDate and Time interval calculationsAdvanced Statistics and Curve Fitting

Complex RPN Calculator

Complex Numbers RPN Calculator

Free

This scientific calculator utilizes a four-level stack and natively handles complex numbers. It allows users to input and view numbers in both polar and rectangular formats, remembering its state and offering 10 memory locations.

Complex number supportFour-level stackPolar and rectangular formats

This utility app functions as a Reverse Polish Notation calculator. It handles complex numbers and utilizes extended precision for all calculations, offering an unlimited stack depth and an undo feature for up to 10 operations.

Reverse Polish Notation (RPN) inputComplex number calculationsExtended precision math

Exact Complex Calculator

Free

Perform complex calculations with a modern, user-friendly interface. Offers both basic and scientific modes, including support for complex numbers and advanced functions. This lightweight application provides a history of computations and is completely free with no advertisements.

Complex number supportBasic and Scientific modesHistory of operations

RePNCalc - RPN Calculator Pro

Easy Reverse Polish Notation

Free

This utility app offers a Reverse Polish Notation (RPN) calculator experience for iOS devices. It features customizable key layouts via swipe gestures and long-press options for stack items. External keyboard support is also available.

Reverse Polish Notation (RPN) inputSwipe gesture key layout customizationLong-press stack item options

🔧 Utilities

(1)

free with in-app purchases

Compare with Calccis

RLM-11CX

Scientific & Programable

Free

This app is a scientific and programmable calculator designed for science and engineering, replicating the functionality of the HP-11C. It offers extensive features for finance, business, statistics, complex numbers, and unit conversions, with a programmable interface for custom calculations.

Finance calculations (amortization, bond price, Black-Scholes)Business functions (break-even, currency exchange)Statistical analysis (regression, probability distributions)

🔧 Utilities

(7)

free with in-app purchases

Compare with Calccis

HP-35

RPN Calculator. HP-35, 45, 21

Free

Emulates classic Hewlett Packard RPN scientific calculators from the 1970s. Experience the original HP-35, HP-45, and HP-21 models on your iPhone.

RPN calculator emulationHP-35 modelHP-45 model