For Apple phone systems most of the applications can be downloaded for free from:
Apple store: 
Such as TUYA, HDLiveCam, CamSC Pro, Allcam365, Ubox, Etc.
For Android base phones you can download the same applications from:
Google Play Store:
Keep in mind that from time to time the application developers will upgrade, change or even discontinue these from these platforms because of some security issues or specific requirements that can't be met, on this last, the developers will find an alternative way to provide you the download for the application through platforms such as:
APKPure 
Alternatively, we will post here the direct links for the applications that have moved away from the standard Apple or Google platforms.
The following are alternative links to the applications listed below:
HDLiveCam For android phones you will have to download APKPure platform in order to download the application, or alternatively use the following link listed below.
http://120.79.165.16/download/index_en.html
CamSC Starting August 1st, 2026, all audio Wi-Fi devices that use this app have been prohibited from live audio transmitting and the app had to be modified to comply with requirements of the official countries of use or origine, so in order to keep the LIVE Stream Audio function now you must download the app from an APK source and install it on an android phone and allow all the permission while you install the app, once the installation is done add and use the feature as you did before. Note, to keep the live audio feature working do not update the app.
CamSC APK Download https://cdn.shopify.com/s/files/1/0622/9721/1119/files/CamSC_Pro.rar?v=1787878468
An APK version is not available for iPhone
If you already had the app CamSC installed on an android phone, simply log out of your app without removing the audio devices you already have paired, then uninstall the app from your phone and install the APK version in its place, log back in with the same email and password you use before and use as before, if you are using the app and devices for the first time then you must turn your Bluetooth ON, be logged in and be at the location of that network to add the device to the app.