Here is an app that teaches us what we should use in our communication with our clients. It is one of the simplest on our laptop.
Is it also an app for iPhone or Android? (I will have to check - but I think they are.)
Sometimes we are lost on what is the most appropriate word that we need to use for our communication with our clients - and here comes the help from this site/app.
Now I do see a cool homepage with examples of the words that we should use with our clients.
Check the site and see why I rate this so high.