Yes, there are subscription plans and additional costs associated with using the TP-Link camera app. The app itself is free to download and use, but some features may require a subscription to access. For example, advanced motion detection, cloud storage for video recordings, and remote access to live camera feeds may all be premium features that require a subscription. Additionally, there may be extra costs for adding multiple cameras to your account or for accessing certain advanced settings or features. It is important to carefully review the pricing and subscription options within the app to understand all associated costs before using the TP-Link camera app.