> Rival ebike maker Cowboy is making an app[0] that supports some VanMoof bikes and they say it will support more models in future.

That future can be very short. Cowboy is like Vanmoofs twin: proprietary parts, ridiculously VC funded, mountains of debt, more losses than revenue, no realistic path towards profitability, ... All that in a ebike boom decade. It's another bankruptcy waiting to happen.