I would like to turn this into a sequential call like with Rx’s

andThen()

viewModelScope.launch(<http://Dispatchers.IO|Dispatchers.IO>) {
            petsRepository.getPets(this).collect { pets ->
                deviceRepository.getDevices(this).collect { devices ->

First?

the first is the getPets call

There's a function called first() that you can use on the flow.

oh I see

Might have to write your own extension if you want to wait for non-error completion. Take a peek at

Flow::onCompletion

You could make getPets a suspend function instead of making it a flow. Remember Flowable is comparable to Flow while Single is comparable to a simple suspend function