Coinvert is available for iOS. You can install the app for free from the App Store (iOS). Later this year we'll be releasing for Android.
Install the Coinvert early access app from TestFlight (iOS). Soon we'll publicly release the full Coinvert app in the App Store (iOS)
Once the app is installed, tap Coinvert to open it
If you cannot install the Coinvert app from the App Store (iOS) you may be running an unsupported OS version. The minimum supported OS is: iOS 11