'flatten learning curve' is a correct and usable phrase in written English. You can use it to describe a situation where someone is taking a long time to learn something and progress is slow, but then with some help and guidance, the learning process is sped up. For example, "By providing her with the necessary resources, we managed to flatten her learning curve and she quickly became a proficient user of the software.".
Learning any application is easy, as there is a standard and convention that is followed in the design of applications, so learn one and you have a flattened learning curve on the others.
So do flattening learning curves because you learn deeper subtleties.
It's slightly difficult to understand at first, but there are a few tricks that can help flatten the learning curve.
By the time elite quarterbacks reach the N.F.L., they are better prepared to play immediately, flattening the learning curve that used to accompany even the most talented college quarterbacks during the transition to the league.
It radically flattens the learning curve for existing users and for the two thousand new ones OpenStreetMap adds every day.
The attributes identified for a mobile phone were comfort, flattening the "learning curve", ease of use, availability, affordability, resale value, capacity, ergonomics, durability, multiple utility, reliability, eco-friendly, brand and line extension.
The learning curve flattened.
Ludwig does not simply clarify my doubts with English writing, it enlightens my writing with new possibilities
Simone Ivan Conte
Software Engineer at Adobe, UK