The phrase "convenience of using" is correct and usable in written English.
You can use it to describe the advantages of using something or to express the effortlessness of using something. For example, "The convenience of using an app to track your spending has made it a popular choice for budget conscious consumers."
When doing so, emphasize the usefulness and/or convenience of using the multiple products in conjunction with each other.
But none offer the convenience of using text-based payment services for all purchases.
After that problem was fixed, I started to appreciate the convenience of using voice interfaces.
Nearby money-changers offer a better rate, but some Chinese visitors prefer the convenience of using their own money.
With four children, the family cannot afford vacations outside of Germany and is not impressed by the convenience of using a common currency.
This is an awful lot of money to pay for the convenience of using a one-stop-shop for your tickets and insurance.
That is the price people tacitly accept for the convenience of using popular web services free of charge.
Private jets also offer the convenience of using general aviation airports to avoid the hassles of commercial airports.
Mostly for the convenience of using the Internet anywhere in her apartment, Ms. Freeman, 58, said that for the last six months she has been using a wireless network a friend showed her how to tap into.
In nearly every instance, they were quoted prices well above the government postal rate, and only one of them was told they were paying a premium for the convenience of using a U.P.S. Store.
That is fine for the vast majority of internet users, who are happy to trade a measure of privacy for the convenience of using popular sites like Google, Facebook, Twitter, Flickr and YouTube.
