Air-o-Graph app for iPhone and iPad

This app is for those who have purchased an Apple HomePod and, like me, you want to use it to play your record collection. With no audio inputs on the HomePod, this can be tricky. I made this app for myself to aide in the process and I think others could probably benefit.

Before purchasing this app, please be aware of the entire setup youll need in order to use it as Ive described below. Also, please be aware that there is some audio delay (a few seconds) and so if youre using it as a microphone output its is slightly weird.

Setup description:
Ultimately, you need to convert the audio output from your pre-amp or receiver to a mono microphone input (or line-in) to your iOS lightning adaptor. Generally, youll need the following (though some products are available which can combine some of these steps.)

1) From your pre-amp, you will need to combine the left and right channels to a mono channel. Do NOT use a Y-cable, they do not properly combine the channels and youll be very sad.
1a) If your preamp output is RCA, you can likely use:
Channel combiner: https://www.amazon.com/Galaxy-Audio-JIBR-RCA-Combiner
RCA to 3.5mm plug: https://www.sweetwater.com/store/detail/CMR206--hosa-cmr-206-6-foot-3.5mm-trs-to-dual-rca-cable
1b) If your preamp output is a 3.5mm stereo plug (standard headphone plug), you can use this:
Channel combiner: https://www.sweetwater.com/store/detail/MiniSumBox--switchcraft-318-mini-audiostix-1-channel-passive-laptop-direct-box
XLR to 3.5mm: https://www.sweetwater.com/store/detail/XVM101F--hosa-xlr-female-to-right-angle-1-8-inch-trs-cable-1-foot
1c) Its possible that if your receiver output has HDMI, you can go directly from that to lightning, but I havent tested this and it might not recognize the audio as a line-in device. If you try it and it works, mention it in a comment!
2) What you now have is a mono signal, you need to convert this to a microphone input. There are a billion of these on the internet, heres one: https://www.amazon.com/ENVEL-Convertors-Smartphone-Microphone-Simultaneously/dp/B01M0T6PSF
3) Youll then need your iOS 3.5mm to lightning dongle. Thats this: https://www.apple.com/shop/product/MMX62AM/A/lightning-to-35-mm-headphone-jack-adapter

Once you have everything connected, start up the app and press the airplay button. It should share your input as youd expect.

Im happy to take requests for improvements or features. There are a few that Id like to have, if theres interest in the comments, Ill push the features here as well.

There will never be ads or information collection for this application (in the current version or any future version).