The Best Of The Free Mobile Apps For Engineers

The App Store now holds 1 million apps --- so does Google. We all now have more choices than ever with endless
low-cost digital pearls just waiting to be downloaded. How does anybody find the best?

You have to sift through user and journalist reviews, check the number of installs, ratings, and when the app was last updated. Then, try them out. Here are some of the best!





During concept design, Simulation apps can help. While you wouldn’t validate your digital prototypes with these (they can’t help you with thermal loads, for example), they can help you set up the most efficient design before choosing materials and otherwise moving into detailed design.

  • Autodesk ForceEffect. Import or sketch out your idea for a static model in this app, and then apply loads. Make changes and repeat until optimized. Available on Android and iOS platforms.
  • Autodesk ForceEffect Motion. Like ForceEffect, import or sketch your idea directly in the app. Then experiment with motors, pistons, and loads. Available on Android and iOS platforms.


Unit Converters______________________________________________________________


Let’s say you’re meticulous as you convert a pound foot to Newtons for an international customer. If you’re still doing it on your calculator, it’s probably costing you hours. Now, let’s say you’re not meticulous as you convert units. In either case, a good app proves essential.

  • Engineering Unit Converter is popular, with more than 100,000 installs and many happy customer reviews.  The best part? The app uses less than 1 MB of space on your system. The downside? It’s only available for Android.

  • Engineering Unit Converter. Same name, different app. This one offers a huge selection of measures and units. The ads can be distracting, but the price makes up for it (free). This one is only available on iOS.


Capturing The Good Idea______________________________________________________


Waiting until you’re sitting at a computer to capture ideas is a little like waiting until tomorrow to write down that crazy dream you just had. You’re likely to forget the details. That’s why engineers, designers, and everybody else so frequently download these idea-capturing apps.

  • Sketchbook Mobile. A good starting point when ideas arise while you’re in the field. Sketchbook Mobile is a professional drawing and painting tool. It’s the less expensive version of Sketchbook Pro, but a step above the free Sketchbook Mobile Express. Available on Android and iOS.

  • Autodesk AutoCAD 360.  A viewer for DWG files. This is probably the most downloaded of the CAD viewer apps with more than 5 million installs on the Android platform alone.  It's available on Android and iOS.

  • GrabCAD. A no-brainer for anybody using GrabCAD Workbench. This mobile app provides access to both the GrabCAD public library and your private projects stored on the GrabCAD Workbench.  View models, comment, create projects, and get update notifications—all from your Android or iPhone/iPad.

  • Evernote. Take notes, save pictures, make lists, make voice recordings, and organize it all in folders that are easy to use and access. And here’s a bonus for your workflow—it has an integration with the AutoCAD 360 app. Available in Android and iOS.




Many engineering apps are some form of reference, often an adaptation of a hardcopy book. These two rise above the rest.

  • Mechanical Engineering Toolbox. This free reference app includes calculators, unit converters, and material properties. Credible reviewers call the app a “superhit” and “very useful.” Available on Android.

  • Mechanics Basics: Mechanics laws, equations, tables, and reference material. This app covers everything from American standard beams to wire rope slings. It will cost you almost $2.00, but what better way to find the “tension increase on a rope with angle” when you’re working on a job site? Available for Android and iOS.


Because You Love Engineering__________________________________________________

  • Mechanical Engineering 101 - Brush up on your ME skills, or share this collection of tutorials, quizzes, and flashcards with a young person who shares your aspirations.Available in iOS and Android


  • Bridge Basher - Build a bridge, and then destroy it by adding forces with pinpoint accuracy. No engineer would ever want to demolish a model in real life, and yet reviewers call the game “enormously satisfying.” Available in iOS and Android.

  • Pocket Slide Rule - Why would you want to learn to use a slide rule in 2015? For much the same reason you might want to build virtual bridges just so you can destroy them. The fun. There are several slide rule apps, but this iOS one is the classiest.




 A simple and powerful collection of electronics tools and references. This is the free version, which contains ads; you can also buy from the Market the PRO version of the app to support the developer, unlock more features and get rid of the ads.

Get ElectroDroid

The app includes:
• Resistor color code decoder (3-6 bands);
• SMD Resistor Code;
• Inductor color code decoder;
• Ohm’s law calculator;
• Reactance/Resonance calculator;
• Voltage divider;
• Resistors ratio, value/series/parallel;
• Capacitor charge calculation;
• Operational amplifier;
• LED resistor calculator;
• Adjustable voltage regulator/LM317 calculator;
• Heat dissipation;


Electronics ToolKit____________________________________________________________


Provides a useful interface for calculating unknown quantities in the fields of electronics and electrical engineering.

Get Electronics Toolkit

Resistor color codes - tells you the resistance, tolerance, upper and lower values, and E-series information for any color-coded resistor.

Ohm's Law and Power Calculator - Finds any unknown quantity in terms of voltage, current, resistance and power dissipation for any omhic component.

Series/Parallel Value Calculator. Finds the total value for any series or parallel combination of resistors, capacitors, or inductors. The calculator can also find an individual value given the value for the whole combination.

Reactance Finder - Calculates the reactance of any capacitor or inductor from the circuit frequency.

Power Triangle - Calculates real, apparent, and reactive power dissipation as well as impedance phase angle in any electrical system.

Resistivity - Finds the resistance of any wire or prism from its dimensions and resistivity, or vice versa.

Magnetic Fields - Finds the force that acts on a conductor in a magnetic field.

Capacitors - Finds the charge and energy stored in a capacitor.

Many more electrical utilities coming soon, with regular updates. Plus, NO ADS.



Allows you to check the characteristics of all the PIC and dsPIC microcontrollers produced by Microchip.

You can search for your favorite microcontroller, reading the features, applying filters, and many new features will be introduced in future versions...

The application integrates seamlessly with the program ElectroDroid which can be downloaded for free from the Android Market.

Write here...




A simple and powerful SPICE engine.
SPICE is an acronym for Simulation Program with Integrated Circuit Emphasis
and was inspired by the need to accurately model devices used in integrated circuit design.

Get DroidTelsa

DroidTesla simulator solves basic resistive circuits using Kirchoff’s Current Law (KCL)
in much the same way a student in a circuits class would,the simulator systematically forms a matrix in accordance
with KCL and then proceeds to solve for the unknown quantities using various algebraic
techniques such as Gaussian elimination and sparse matrix techniques.


Lessons In Electric CIrcuits_____________________________________________________


Get Lessons In Electric Circuits

For Android:
Volume I - DC
Volume II - AC
Volume III - Semiconductors
Volume IV - Digital
Volume V - Reference
Volume VI - Experiments


Electrical Wiring_____________________________________________________________

Get Electrical Wiring

- Pire Wheel/Ohms Law
- Conduit Offset/3pt saddle
- Ampacity Sizing
- Residential Load - Standard and Optional Methods
o Demand Load in VA and Amps, Neutral Current
o Copper and Aluminum Service, Neutral, GEC, EGC conductors
- Ground Wire Sizing
- Box Fill
- Conduit Fill
- Voltage Drop
- Burial Depth
- Motor electrical/components


Electrical Calculations_________________________________________________________

Get Electrical Calculations

Calculation of section (Wire size)
Calculation of voltage drop
Calculation of current
Calculation of voltage
Calculation of active power
Calculation of apparent power [PRO]
Calculation of reactive power [PRO]
Calculation of resistance
Code resistors 4 colors
Code resistors 6 colors [PRO]
Color code inductor [PRO]
Colors resistor from value
SMD resistor code [PRO]
Fuses [PRO]
Sum resistors


Electrical Pro_______________________________________________________________

A great tool for electrical engineers and electricians.
This app is a compilation of five sub apps that use the 2008/2011/2014 National Electric Code (NEC).


Get Electrical Pro

Bury Depth:
This will calculate the depth needed to bury a line.

Box Conduit Fill Pro:
This will calculate:
The maximum wires in a conduit
The minimum box size
The minimum conduit/nipple size

Fault Calculator Pro:
This will calculate:
A fault over a line
A fault through a XFMR
The bracing de-rate factor for a utility XR ratio


Electrical Engineering Pak_____________________________________________________

Electrical Calculator contains 39 Calculators, that can quickly and easily calculate different electrical parameters. Automatic Calculations and Conversions with every Unit and Value Changes.


Get Electrical Engineering Pak

Electrical Calculator:
• Ohms Law Calculator
• Voltage Calculator
• Current Calculator
• Resistance Calculator
• Power Calculator

• Single Phase Power Calculator
• Three Phase Power Calculator
• Single Phase Current Calculator
• Three Phase Current Calculator