hour not start with a vowel but app show it "an hour"
'An' is used if the following word starts with a vowel sound. As jitengore said, 'h' is silent in 'hour' - so the sound that we hear in the beginning of 'hour' is a vowel sound. The same is true for 'honour/honor' and 'honest'.
Yes, because 'h' is silent in 'hour'.
Bahut acha smjhya apne jiten and PP....thnx so much