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Audio Visual Application for the professional or beginner in the Audio Visual industry.

AV Buddy is a essential information and calculation tool which will assist your Audio Visual needs. Including pinouts, charts, cut lengths, diagrams, clear AV Connector photos, descriptions, AV Calculations. Each connector has a description with useful information.

Visual Connections:
BNC- With connector diagram and cut lengths.
COMPOSITE - Includes diagram and colour coding for various equipment.
DVI - Various DVI type diagrams and pinouts.
HDMI - Includes a version comparison chart. Plus 2 pinout diagrams.
Mini Din - Diagrams for 4 and 7pins.
VGA - Pinouts and diagram.
F-CONNECTOR - Includes diagrams and common coax cable diameters.

Audio Connections:
TRS + TS Audio - Stereo and mono diagrams.
XLR - Includes diagrams for 3,4 and 5 pin connectors.
SPEAKON - Connections and diagram.
RCA - Different audio colour connection and diagram.
Connections- 21 audio interconnections diagrams.
Captive screw - pin outs for balanced and unbalanced audio.

RJ45 - Diagrams for TypeA and TypeB.
DB9 - Pinouts, charts and description.
USB - Pinouts for A,B, MiniA & B, MicroA & B and USB 3.0.

Audio testing - Audio files for testing. 12 Audio files including Brown, White, Sweep, Tone in and Tone out.

Speakers - Diagrams for parallel, series and series/parallel connections.

Decibel comparison chart.

Test Patterns - 20 display test patterns for use with your mobiles AV adapter to external display.

SPL Meter - Measure a rooms decibel level. Includes calibration.

Aspect Ratios - Popular height to width ratio's with description.

Resolution chart - 52 resolutions + aspect ratio's.

Resolution graph - Various display resolutions for quick reference.

Mic Polar Patterns - Displays 7 mic polar patterns with zoom function and decibels.

Display section - Description for LED, PLASMA, LCD and OLED screens.

AV Buddy also includes a AV calculation section.

Projector throw - Projector throw calculator for estimated throw distances plus brightness and native resolutions for Epson, Sanyo, Viewsonic, Sony, Barco, Christie, Mitsubishi and NEC projectors. Includes instructions.

Projector throw2 - Calculator for a projectors throw distance with manual lens ratio input.

Projector lumens - Calculation for lumens required based on ambient light for selecting projectors when designing.

Image height - Calculate the display size according to viewer distance.

Aspect ratio - If the height or width is known of a display, calculate the other by the aspect ratio.

Display size - If you know the resolution and the viewers distance, calculate the display size.

Viewer Text - By measuring the text height on a display. Calculate how far away the farthest viewer should be.

Diagonal - Calculate the diagonal distance by knowing the height and width.

Farthest Viewer - Calculate the farthest viewer according to screen size.

Impedance calculators for speakers. Series and parallel.

dB volt ratio - Calculate the gain needed to raise the output from one voltage to another.

dB difference - dB difference calculation between two voltages.

PAG/NAG - Determine the maximum amount of sound re-enforced in dBs that can be achieved before feedback.

Converter - Converter for Area, Energy, Illumination, Mass, Temperature and Length.

Ohms law - Power, Voltage, Current and Resistance calculators.

Resistors - Resistor band calculator for 4, 5 and 6 bands.

Heat load - BTU equipment calculator.

Rack unit - Convert RUs into Inches, mm and cm. Convert Inches, mm and cm back into RUs.

What’s New

Version 8

Back button fix.
2 new calculators - Aspect ratio and Display size.
Captive screw pin out section.
Updated email and web site address.
Test pattern fix - Now detects available resolutions.
AV Contacts updated.

Ratings and Reviews

3.3 out of 5
7 Ratings

7 Ratings

AV Bro ,

Not bad

Plenty of good info in here. The kind of stuff you should remember but never do. I'd like to see some more audio calculations added. PAG/NAG and the log calculators would be a good start. Nice job!

Great scanner app! ,

Great training tool

I just started working as a tech. This is a great addition to my tool bag. So far, it contains all the connectors I’ve used in the field. I was referred to this app from a veteran tech. I recommend it too!

Developer Response ,

Thank you Great Scanner App.

Gentle Giant II ,

Outdated app, video output doesn’t work

I was recommended this app by a fellow professional, who had heard about it not used it.
I spent my $.99, and found that the test display function does not detect even a basic display.
There is some commonly available information included, is it worth $.99?
I wouldn’t do it again.
It would be nice to see that they would come up with a more recent update instead of a computer game, found on their website.
They have a pro version, for iPad.
I am not going to spend $1.99 to see that it doesn’t work as well.

Developer Response ,

Hello Gentle Giant II.

Sorry to read that you are having trouble with AVBuddy. I'm actually in the middle of a BIG update that will include additional connectors, calculators, AV training, tools and bug fixes.

I have just tested AV Buddy on my iPhone 11 and connected it to a 55" Samsung consumer-grade TV via an Apple A1348 Lightning AV adapter and a Kramer HDMI cable, it connected perfectly and all test patterns are displayed. I'll try to replicate your problem and hope to find a fix.

Commonly found information is included and can be found on the internet, but AV Buddy is a way of collating that information to make it easier to find. Plus AV Buddy has a lot more, for example, AV Tools and AV Calculators.

Thanks again for downloading, I'll be updating ASAP.


96.2 MB

Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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