are there any recommendations on a Observer / RX multiplatform library targeting Android / iOS? I saw https://github.com/noheltcj/RxCommon but not sure how up to date is. Also not necessarily looking for RX specifically, but a framework perhaps already available to deal with observables on Android / iOS.

Have you seen this? https://github.com/badoo/Reaktive

Nice seems one of the most complete frameworks. Just wanted to avoid picking one that was no longer supported. It would give more confidence knowing for example what larger companies are doing. (like maintaining their owns, vs depending on one of these)

Coroutines are probably the way to go unless you have a good reason to not use them. Take a look at

Flow

.

Are they working well on iOS too?

They work. There are still some quirks and you likely will need to use the native-mt branch, but the future-proof solution for sure.

are kotlinx.coroutines available only on that specific branch? I'm getting Unresolved reference: coroutines when tryng to import them in common shared code (using Kotlin 1.3.70 and Kotlinx Coroutines 1.3.5)

We’ve moved onto 1.4.0 in general. You can see the changes to the dependencies that we’ve been using here: https://github.com/touchlab/KaMPKit/commit/06701c1b4c0a425b3f8acf1d55c0ff0c2aa7f5b4#diff-f6dcd12435c476b2cedd79bcd292b929

got it, will try to do the same on my end. So would you also recommend using Kotlin Coroutines / flow for handling async and observers on multiplatform code?

First? For multiple threads, the first version was around November of last year, but I’m not sure what version that was. 1.4.0 is not necessarily required, but I would think that’s the simplest option.

Got it, I'm getting Unresolved reference: coroutines when trying to import them in common shared code (while it compile fines for Android code) - using Kotlin 1.3.70 and Kotlinx Coroutines 1.3.5. So wasn't sure if they are not available for common shared code in the version I'm using, or if I've not set up correctly the dependencies in my build.gradle. Unfortunately upgrading to 1.4.0 is a pain in the system I'm currently on, so wanted to know if it was required.