Because WhatsApp is available on both iOS and Android, there will be some visual differences between the two versions. That isn’t the most serious problem, to be sure. If you’re using the Android version, you probably don’t care what the iOS version looks like. WhatsApp, on the other hand, is working to make the app more consistent across both platforms. The pill-shaped highlight around the current tab will let you know which tab you’re on. This is the white action bar, but it will change to match the dark theme.
