Streamlined
Part of speech: adjective
Definition: Designed to offer little resistance to the flow of fluid, especially by having sleek, graceful lines. Having been made more simple and straight forward.
Part of speech: verb
Definition: To design and construct the contours of a vehicle etc. so as to offer the least resistance to its flow through a fluid.
Example sentence: People want to download publications quickly and read them without cruft. Publications that started in print carry too much baggage and usually have awful apps. 'The Magazine' was designed from the start to be streamlined, natively digital, and respectful of readers' time and attention.
Efficient
Part of speech: adjective
Definition: Making good, thorough, or careful use of resources; not consuming extra. Especially, making good use of time or energy.Using a particular proportion of available energy.
Example sentence: The higher your energy level, the more efficient your body The more efficient your body, the better you feel and the more you will use your talent to produce outstanding results.