What app is used for deploying the D-RTK 3 Relay Fixed Deployment Version?
The DJI Enterprise app.
Related Questions
How good is the DJI Phantom 4 RTK for surveying and mapping?
Can I wirelessly monitor the status of a DJI Power Expansion Battery 2000 via app?
Yes, by connecting DJI Power Dongle to the power station.
How to list your developed Manifold PSDK application in the DJI Ecosystem Products Catalogue?
Submit your solution at DJI Enterprise; once approved, it can appear in the Ecosystem Catalogue.