Mobile test automation for iOS and Android

I wonder if you have any mobile test automation tool that you can recommend? After trying several tools I simply cannot find one that meets every criteria. Ranorex can be used on both devices but after facing too many issues I have chosen not to use it. The best tool I have encountered is robotium, although it only works on Android and therefore is not interesting.

Criteria:

• Possible to CI integrate.


• Can be used with Nunit or a similar structure.


• Can be used on both iOS and Android.


• Is stable.

Please do not recommend one of these recording tools, since they (in my opinion) do not test anything.

Have a nice day an thank you for all the help.