Gleam Competitions , 78 reviews

I'm extremely frustrated with this app. I've gotten support but it really hasn't helped me much. I really wish I hadn't paid good money for it.

Rather pricey after the free trial. The same thing can be accomplished with Mailchimp and a little scripting. We found the app OK, but as we said way over priced for most smaller shops.

Unfortunately, this APP doesn't support other languages than English.

Well, they say it supports 25 languages (French included) but in reality... Many of translations are missing (so phrases remain in English), are weird and not natural, or are made with Google translator which is even worse I think.
And if you would like to change all these texts by yourself, you have to pay 100$/month more for a plan that includes this option.

Too bad because app seems to be good (but I'm not sure because I couldn't even run any contest because of this language issue).

Unfortunately this app just requires plan upgrade after plan upgrade in order to get any real use from it. The final straw for me was not being able to use competition hashtag entries unless I upgraded to an almost $400USD / month plan!
Until you upgrade to the next plans from the last plans (all payable immediately) you won't really know easily, what you are in for.