OnCue
OnCue is a wireless technology that has always relied on Apple's technology in iOS that provides peer-to-peer transfer of information. When these technologies first debuted, they were limited to Bluetooth data transfers and were highly reliable, albeit slow. With each release of iOS, new features and support for high-speed data transfers over WiFI networks have made this solution and interoperability with multiple devices difficult in certain circumstances. Starting in iOS 12, OnCue now only operates on WiFi. For best performance, ensure that both Bluetooth and WiFi are enabled on your device. You do not need to be connected to a WiFi network for OnCue to function.It is recommended that if you are using OnCue that you use devices running the same version of iOS/iPadOS if possible due to changes that Apple makes in each major release. Keep in mind that some older iPads, such as iPad 1 and 2, share an antenna between Bluetooth and WiFi radios which can interrupt the wireless signals causing poor performance. The peer-to-peer technology by Apple on which OnCue is based is also limited to about 5-6 devices.
OnSong Connect
Because of these limitations, we created our own, robust wireless sharing solution a few years ago. We call it OnSong Connect and it powers a number of newer features in OnSong, such as the Console and Chromecast lyrics projection. It is cross-platform too and can support scores of connected devices.Overall, we recommend using OnSong Connect. It's more powerful, well-supported, and robust. It's fast and super resilient to networking issues. Since it does require WiFi, you will need to connect all of your devices to the same WiFi network. We recommend purchasing a portable network router to connect to in order to ensure the best performance at various venues.