The DSLR Controller app allows users to connect their DSLR camera to their phone via USB or Wi-Fi. This app is particularly useful for tethered shooting, as it allows users to share pictures they are shooting directly with others via Chromecast. The free version of the app offers features such as viewing all pictures on the camera in a grid, quick loading of JPG and RAW files, and the ability to share pictures directly from the camera to other apps like Instagram and Facebook. The paid version offers additional features such as showing Exif data, downloading RAW files, and using Partymode to shoot pictures and show them immediately.

The DSLR Controller app is compatible with a range of cameras from Sony, Nikon, and Canon. However, it is important to note that the mobile device must support USB-host mode to connect to the camera via USB. For Sony cameras, the app is compatible with those that have the 'Smart Remote Control' app, such as the Alpha 6300. For Nikon cameras, the app is compatible with models such as the D750, D800, and D850. For Canon cameras, the app is compatible with models such as the EOS R, EOS RP, and EOS R5.

Overall, the DSLR Controller app is a useful tool for photographers who want to connect their DSLR camera to their phone and share pictures with others. The app offers a range of features, including the ability to view and share pictures, download JPG files, and use Partymode to shoot pictures and show them immediately. The paid version of the app offers additional features such as showing Exif data and using Liveview with Camera Control.