I'm looking for a remote release for Sony A7Rii. As far as I can tell there are none on the market and the only way is via the PlayMemories app. Unfortunately my phone is a Motorolo E which is not compatible - it won't connect to the camera and is listed as not compatible in the PlayMemories documentation. So my question is, what is the most cost effective way to get a remote release? Is the only way to buy a new phone?
The Sony website lists a few non-app-based remote release options for the α7R II, namely the RMT-DSLR2 Wireless Remote Commander, the RM-VPR1 Remote Control with Multi-Terminal Cable, and the RM-SPR1 Remote Commander.