This one's new on the block, and, when opensubtitles.org is up and happy, it works quite well, but, so far, this is the only source it looks at, so your mileage will vary from other subtitle finding apps. Subtitle Master, for instance, has consistently found subs that Caption will not. In point of fact, as of 02/16/17, Caption has not been working for me for the last week or so. The developer tells me he's working on setting up more than just one source, which should make this app at least recommendable as part of your toolbox for subtitle finding. It is not at a state to stand alone yet.