A first release of the app for the new device version 4.0 has been pushed to the Google Play store and Apple store. You also need to upgrade the firmware of the device as explained here. The iOS app will follow shortly.
Note that you can check the version of the Android/iOS app in the about section accessible from the top right menu button.
We apologize for the delay in releasing this app. We are working hard to add more features to make the experience of your In/Out device as valuable as possible. Please stay tuned on this website.