Please update the app ASAP.. – Localphone: Local Numbers - cheap international calls Review

I have been using this app from 3 years. I have received an email stating that not to update my iPhone to iOS 11 as this application is not supported in the new version. Please do release an update ASAP to support the new version of iOS. If not it will be forcing me to switch to a different app.
Review by Kumar6578 on Localphone: Local Numbers - cheap international calls.