User friendly vs. compatible

[Hoamuahe]

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #615 "Real Life: The Internet and Websites (1)", question 10

I know a lot of people like the older version of the spreadsheet program but I like the new one. It is very user -- .......... I didn't have to take a special class to figure out how to use it and I can find the majority of its features while using it and without having to pull out the instruction manual.

(a) compatible
(b) nice
(c) congruent
(d) friendly

English Language Proficiency Tests, Advanced Level

ESL/EFL Test #615 "Real Life: The Internet and Websites (1)", answer 10

I know a lot of people like the older version of the spreadsheet program but I like the new one. It is very user -- friendly. I didn't have to take a special class to figure out how to use it and I can find the majority of its features while using it and without having to pull out the instruction manual.

Correct answer: (d) friendly

Your answer was: incorrect
I know a lot of people like the older version of the spreadsheet program but I like the new one. It is very user -- compatible. I didn't have to take a special class to figure out how to use it and I can find the majority of its features while using it and without having to pull out the instruction manual.
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why "compatible" is inappropriate here?
Thanks in advance

[Mister Micawber]

Yes. The phrase is 'user-friendly'.
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Native English teacher at Mister Micawber's