Electronics Toolbox

Peter Ho

Contains adsIn-app purchases

About this app

Electronics Toolbox – All-in-One Electronic Calculator & Reference

The ultimate mobile toolkit for electronics engineers, hobbyists, students, and professionals!

Over 80 powerful tools & references in one clean, fast, and offline app. Whether you're designing circuits on the go, debugging in the lab, or learning electronics, this is the only app you'll ever need.



Basic tools
• Resistor color code
• Inductor color code
• Resistor SMD marking & EIA-96
• dBm, dbW, dBuV converter
• Resistors in series
• Resistors in parallel
• Two resistors in ratio
• Voltage divider
• Ohm's law
• Y-Δ converter
• L, C reactance
• Complex number operation
• RC charging time constant
• RC filter
• RL filter
• LC circuit
• 555 monostable
• 555 astable
• Wheatstone bridge
• Trace width calculator
• Battery capacity
• Operational amplifier
• LED calculator
• RMS calculator
• Range calculator
• Temperature conversion
• BJT bias voltage
• Voltage regulator
• Shunt regulator
• Length converter
• Limit 10 combinations of component values


Digital Tools
• Number converter
• Logic gates
• DAC R-2R
• Analog-to-digital
• 7-segment display
• Minimization of boolean function
• Half adder & full adder
• Synchronous counter up to 6 states
• Cyclic redundancy check CRC-8, CRC-16, CRC-32
• Hamming code


Electronics resources
• SI unit prefix
• Physical quantities
• Circuit symbol
• ASCII table
• 74xx series
• CMOS 40xx series
• Pinouts
• C programming language
• Python language
• Common linux command for Raspberry Pi
• Resistivity table
• Permeability table
• Permittivity table
• Ampacity table
• AWG table
• Standard wire guage (SWG) table
• World plug
• EDA software
• Flip-flop
• SMD marking
• Formulas

PRO Version Unlocks (one-time purchase)
• No limitation of component values
• Selectable 1%,5%,10%,20% of values
• Complex matrix
• Pi-pad attenuator
• T-pad attenuator
• Coil inductance
• Poles & zeros calculator
• More resources

Perfect for:
• Electronics students & teachers
• Hardware makers & Arduino/Raspberry Pi enthusiasts
• Professional engineers in the field
• Hobbyists building robots, amps, and drones
• Works 100% offline – no internet needed!
• Lightweight, super-fast, regularly updated with new tools.

Need a feature? Just email us – we listen to every suggestion.
Download now and supercharge your electronics workflow!


All trade names mentioned in this app or the other documentation provided by this app are trademarks or registered trademarks of their respective holder. This app is not related or affiliated in any way these companies.

Ratings and reviews

Love it. More useful than anything I have ever seen. When I first downloaded it I only skimmed through it. Since then I started on a project, I remembered I had this app. I was able to quickly figure out how it worked and able to find the values I needed without all the maths or searching online. If an idea pops in your head, you can open this app and bounce some configurations around. Very handy tool app.

This is brilliant. Really, when I saw how many things are in this app, I was mindblown. Nevertheless there is one detail I noticed that someone could easily miss in my opinion: the physical quantities and units table is great (although there's a typo - kevin instead of kelvin) but I think that it would be nice to add also expressions of given units in SI base units. And I don't know if you're planning it, but adding a list of some useful physical constants would be another welcome improvement.

I'm the Retail Security officer, stand at the door checking the slips to ensure that items on the slip are corresponding with items in the bag. Your Application has helped me a lot. I love when customers approached me for electronics items to describe for them and thanks a lot. I have to continue with learning because it wide and good. I'm from South Africa 🇿🇦. KEEP UP THE GOOD WORK. THANKS AGAIN.

What’s new

5.6.60
- Fix minor bugs