I want to develop custom app in android wear (below 2.0 version). Is it possible to do with below 2.0 versions ?
Note: I already tried app using 2.0 preview version. Its working fine
Yes, it is possible to use an older version to develop custom apps in Android wear. However, there are limitations in using an older version, unlike the version 2.0 you can access the internet directly over Bluetooth, WI-FI or cellular with relying on the Data Layers APIs.
There are numerous updates were in you can only find in version 2.0. below is the link of what's new in Android Wear 2.0: http://android-developers.blogspot.com/2016/05/android-wear-20-developer-preview.html