TechCalc+ contains 12 computing modes in one application + a handy reference section.
Modes included are:

* Basic Mode
* Scientific Mode
* 64-bit Programmer Mode (Hex Oct Bin and Dec)
* Graphing (save copy of graph to sdcard)
* Matrices
* Complex Numbers (cartesian polar using Euler's identity)
* Quick Formulas
* Quick Converter
* Time Calculator
* Equation Solver
* Calculus (Derivative Definite Integral Taylor Series & Indefinite Integral) - requires Android version 2.3 or higher
* Financial

+ the Periodic Table of Elements!

Features include:

* All Trigonometric operations (radians degrees or gradients)
* Powers & Roots
* Logs and Antilogs
* Factorial Modulus & Random Numbers functions
* HCF LCM Prime factorization
* Pol() & Rec() Functions
* Permutations (nPr) and Combinations (nCr)
* Statistics
* Fractions Mode
* A wide range of conversion categories and constants
* 20 Memory Registers in each of the calculation modes
* Detailed calculation history
* Extensive Help and Reference
* Highly customizable via the Settings

The reference section includes:

* Physical Laws
* Names in the Metric System
* Mathematical Tables
* Elementary & Linear Algebra
* Trigonometric Identities
* Differentiation & Integration Rules
* Statistics Formulas
* Vector Mathematics
* ASCII Fractional Bits Roman Numeral & Number Base Converters
* pH Interpolation Body Mass Index (BMI) Percentage Proportion & Molecular Weight Calculators
* Sigma & Pi Notation
* Balancing Chemical Equations
* Statistics (Grouped Data)
* Numerical Sequences
* Humidity Calculations
* Boolean Algebra Calculator
* Empirical Formula Calculator
* Characteristics of an RLC Circuit
* Feet and Inches Calculator

Please email any questions that are not answered in the Help section.