Best ThetaCalc alternatives: apps like ThetaCalc

10+ similar apps compared and reviewed

4.8 avg rating
10 free apps
Updated October 2026

ThetaCalc is great, but it's not the only option. Explore 10+ similar apps for iPhone and iPad, each reviewed and rated by real users. Find free alternatives, premium upgrades, and hidden gems.

Top Alternatives to ThetaCalc

Command-Line Calculator#2

Command-Line Calculator by Ketan Appa

Calculator with History
Strong Contender
🔧 Utilities
5.0(5 ratings)
Free
Command-Line Calculator screenshot 1
Command-Line Calculator screenshot 2
Command-Line Calculator screenshot 3
Command-Line Calculator screenshot 4
Command-Line Calculator screenshot 5

This app offers a command-line interface for performing complex calculations, including chained operations, variable assignments, and advanced mathematical functions. It supports various number bases, constants, and provides a built-in help system for ease of use.

More apps like ThetaCalc

4
bcRPN
bcRPN
bcRPN
by Paul Wilkins
Free

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
🔧 Utilities
(4)
free
5
RCL-57
RCL-57
RCL-57
by Paul Novaes
Free

This app faithfully recreates the TI-57 programmable calculator, offering its full scientific functions and programming capabilities. It includes a user manual, sample programs, and features like turbo speed and alphanumeric display.

TI-57 recreationScientific functionsProgramming capabilities
🔧 Utilities
(0)
free
6
PyCalc
PyCalc
PyCalc
Calculate better with Python
Free

This app offers a revolutionary approach to mobile calculations, allowing users to view and edit entire equations at once. It leverages the power of Python 3.11.1 for advanced functions, symbolic math, and financial analysis, making complex computations accessible on the go.

Real-time editable calculation viewPython 3.11.1 interpreterProgrammable scientific calculator
🔧 Utilities
(15)
free
7
Dozecal
Dozecal
Dozecal
Duodecimal calculator
Free

This educational calculator promotes the use of Base Twelve (duodecimal) in math and science. It offers standard mathematical functions in both duodecimal and decimal modes, with automatic conversion between them. It utilizes Reverse Polish Notation (RPN) for calculations.

Duodecimal and Decimal modesAutomatic mode conversionRPN (Reverse Polish Notation) input
🔧 Utilities
(4)
free
8
Halcyon Calc Lite
Halcyon Calc Lite
Halcyon Calc Lite
by Halcyon Touch Software
Free

This app is a powerful calculator for students and professionals, offering advanced features like symbolic expression manipulation, graphing, and statistical analysis. It supports real, complex, and integer numbers, matrices, and vectors, making it versatile for various mathematical tasks.

Symbolic expression manipulationGraphing of expressionsMatrix and vector calculations
🔧 Utilities
(15)
free with in-app purchases
9
RLM-10CX
RLM-10CX
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
🔧 Utilities
(1)
free
10
HP-35
HP-35
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
🔧 Utilities
(5)
free