There isn't currently a Wavve app but it is optimized for mobile use. All features should be usable except that iOS users cannot download videos onto their devices.
Update: As of iOS update 13, you can download videos to your iOS device (iPhone / iPad) with the Safari browser. You cannot download your videos to your iOS device with other browsers, though. You must use Safari to download videos on iOS devices.
When is support available?
Read this link for support hours: https://support.wavve.co/en/articles/5373873-when-is-support-available-to-help-me