Electrodoc is a simple and powerful collection of electronics tools and references.
Electrodoc is the new app name of Electrodroid. Same app, with the same and even more features.
This is the free version, which contains ads; you can also buy from the app store the PRO version of the app to support the developer, unlock more features and get rid of the ads.

The app includes:
• Resistor Color Code;
• SMD Resistor Code;
• Inductor Color Code;
• Ohm's Law;
• Reactance/Resonance;
• Filters;
• Voltage divider;
• Resistor Ratio;
• Resistor series/parallel;
• Capacitor series/parallel;
• Capacitor charge;
• Operational Amplifier;
• LED Resistor Calculator;
• Adjustable voltage regulator;
• NE555 Calculator;
• Power dissipation;
• Battery Life calculator;
• Inductor Design Tool;
• Voltage Drop Calculator;
• PCB Trace Width Calculator;
• Power Calculator;
• Frequency Converter;
• Analog-Digital Converter;
• Port pin-out (USB port, Serial port, Parallel port, Ethernet port, Registered Jack, SCART connector, DVI connector, HDMI connector, Display Port, VGA connector, S-Video connector, Jack connector, FireWire connector, RCA connector, Audio DIN connector, XLR and DMX, ATX Power connectors, EIDE/ATA - SATA, PS/2-AT connectors, 25-pair cable color code, Fiber Optic cable color, MIDI connector, Apple Lightning connector, OBD-II Car connector, Car audio ISO connector, Arduino boards);
• Resources (PIC ICSP / AVR ISP, ChipDB (IC pinouts), USB specifications, Resistivity Table, AWG-SWG Wire Size, Ampacity Table, Standard Resistors, Standard Capacitors, Capacitor marking codes, Circuit Schematic symbols, Symbols and Acronyms, SI Units prefixes, ASCII Table, Boolean Logic gates, Switch Information, 78xx IC, Batteries, Coin Batteries, Decibel Table, Radio frequencies);
• Full support for EIA resistor series for all calculators;
...and more to come!

The Pro version doesn't have any ads, and has additional features like new calculators, and more pinouts and resources.
There are also improvements in some calculators (e.g. LED, voltage regulators), extra features in some plugins, and it is possible to sort the lists according to your preferences.
These are the extra calculators and pinouts available at the moment only in the PRO version: Lookup Resistor color by value, Zener Diode Calculator, Y-Δ Transformation, Decibel Converter, RMS Converter, Range Converter, Power Over Ethernet, VESA Connector, PC peripheral connectors, MIDI/Game port, Apple 30-pin connector, PDMI, Trailer connectors, SD card pin-out, SIM/Smart card, Raspberry Pi pin-out, LCD pin-out, GPIB/IEEE-488 pin-out, Thermocouples colors, Arduino boards, JTAG pinouts, BeagleBone boards, SMD Package Sizes, 7400 series IC, PT100 Conversion Table, Fuses color code, Automotive Fuses colors, DIN 47100 color coding, IP marking, World Plugs & Sockets, IEC Connectors, NEMA connectors.

The app has also support for plugins to expand functionality of the application (e.g. PIC and AVR micro-controllers Database, simulators, parts search).

If you like the program, please rate it, and buy the full version to support the development.
Electrodoc Pro link: play.google.com/store/apps/details?id=it.android.demi.elettronica.pro

For FAQ and full change-log, visit electrodoc.it

From version Electrodoc - electronics in your hand 5.1:

Version 5.1:
• fixed some bugs and improved user experience in some calculators;
• new resources: PCI and PCI Express bus [PRO];
• more options and materials in voltage drop calculator;
• fixed some resources (NEMA, USB), improved smd package sizes page;
• fixed layouts for some screen/resolutions;
• translation updates;

Variant
Arch
Version
DPI
(Android 4.0+)
Latest: 4.6 on June 5, 2018
(Android 5.0+)
Latest: 5.0 on July 30, 2020
All versions
Electrodoc - electronics in your hand 5.1

Version:5.1

Uploaded:April 14, 2021 at 12:30AM UTC

File size:8.84 MB

Downloads:335

Electrodoc - electronics in your hand 5.0.1

Version:5.0.1

Uploaded:August 12, 2020 at 11:46AM UTC

File size:8.44 MB

Downloads:670

Version:5.0

Uploaded:July 30, 2020 at 8:56PM UTC

File size:8.43 MB

Downloads:145

Electrodoc - electronics in your hand 4.9.1

Version:4.9.1

Uploaded:October 24, 2019 at 6:25PM UTC

File size:6.84 MB

Downloads:434

Electrodoc - electronics in your hand 4.9

Version:4.9

Uploaded:October 22, 2019 at 9:24AM UTC

File size:6.84 MB

Downloads:132

Electrodoc - electronics in your hand 4.8.1

Version:4.8.1

Uploaded:March 30, 2019 at 8:14PM UTC

File size:6.84 MB

Downloads:273

Version:4.8

Uploaded:March 1, 2019 at 7:07PM UTC

File size:6.69 MB

Downloads:110

Electrodoc - electronics in your hand 4.7

Version:4.7

Uploaded:November 11, 2018 at 8:05PM UTC

File size:6.4 MB

Downloads:240

Version:4.6

Uploaded:June 5, 2018 at 10:18PM UTC

File size:6.21 MB

Downloads:97