The app for remote control of an iPhone/iPad camera using another iPhone/iPad. The two devices use peer-to-peer Wi-Fi, which allows the devices to communicate directly, even if they are not on the same Wi-Fi infrastructure network. This technology is used by AirPlay, AirDrop, etc. In other words, Internet access or a Wi-Fi router is NOT needed. The maximum distance at which a connection can be maintained between two devices is about 20 foot.
The app allows you to select a camera (if the device has several cameras), manually configure the camera, including the frame rate. The frame rate of the device acting as a screen is also adjustable. By reducing the frame rate, you can reduce energy consumption and, therefore, battery life. This is especially important if you are using a very old iPhone/iPad with a weak battery as a screen.
The app can work on iOS 12 and newer. This makes it possible to use old iPhones starting with the iPhone 5S and newer as a screen.
IMPORTANT!!! Use the newest iPhone/iPad of the two as a camera. New devices prepare frames for sending MUCH more efficiently, with less power consumption and less heat generation. This is the reason for the very low maximum possible frame sending rate if an old device is used as a camera. The old device may even turn off due to overheating and display a corresponding message. If you still want to use the old device as a camera for long-term surveillance, then select the mode for shooting video and select a video format with a small frame size (for example, 360p) in the app settings. To take photos, select the photo mode for a short time.
IMPORTANT!!! When using the app to inspect dirty, hard-to-reach areas (like the underbody of a car), put the iPhone case on and place the iPhone in a small (the size of the iPhone in the case) clear zip-lock bag. Use the thinnest bags as they are the most transparent.
IMPORTANT!!! The inspected mechanisms should not be hot. For example, to damage an iPhone, it is enough to bring the iPhone a short distance to a heated exhaust pipe of a car. The air in the inspected volume should not be heated and should not contain substances or microorganisms that can harm a person or iPhone.
The app can be used without a second device, for taking photos and videos with manual camera settings.