iOS Call Screen Themes is a free personalization app developed by Ruru LTD that customizes your caller screen with impressive color phone themes. It is also a video ringtone and caller name announcer app with a great call blocking feature. With Caller Theme Effect, you can choose from a variety of stunning and vibrant caller screen themes. You can assign different themes to different contacts based on your relationship with them and even personalize the caller ringtone for specific contacts. iOS Call Screen Themes is easy to use and completely free to download. Change your caller screen now and make incoming calls prominent with the app's awesome call flash effects.