Oh and for anyone who doesn't know yet - there is this website https://forvo.com/ which has a lot of audio recordings from native speakers. You can search for a single word or a full phrase. It really helped me with Korean and German when I had doubts:). Source: 6 months ago

Another useful site for hearing pronunciations is Forvo: https://forvo.com/ Those are user contributed pronunciations, so there was an effort to say the word clearly. Although Youglish might be more authentic in a sense, I prefer hearing a word enunciated precisely if I want to learn the pronunciation. - Source: Hacker News / 8 months ago

Forvo to hear isolated recordings of words, YouGlish to hear them in context. Source: 11 months ago

Another possible resource is a site called forvo in which people pronounce words and sentences in their own languages. Very useful tool to learn pronunciations of new words but please bear in mind that sometimes they can be unrealistic if they are exaggerated and/or out of context. Source: 11 months ago

For individual words and phrases, go to http://forvo.com where you can hear native speakers in dozens of languages and even submit new words, names, or phrases. Source: 12 months ago

Not sure of an application that can do what you want, there is PopChar for finding/adding accented characters (paid). Source: over 1 year ago