I'm not expecting you to give a review that suits every viewer, I'm expecting you to add sufficient information to judge whether the app you're proposing is any better than the next.
In case of Fitango, they even make it easy for you, because they have a promotional Youtube video, which should explain most features. Given my feature-request here, this would have taken care of most of the answer.
As this MSO question explains, it's generally frowned upon to just supply a link. The most important reason is linkrot, because the information in your link might not exist a year from now.
When someone goes on StackOverflow, the question "answer" should actually contain an answer. Not just a bunch of directions towards the answer. You should provide context to all your links, otherwise the OP will have no idea what they are clicking into.
You're also doing yourself a favor, because the first user who does post an overview of the features accompanied by screenshots will gain all the rep.
As for the fact that the question didn't ask for it, that's a really poor excuse. Garbage in, mean garbage out? Next time you see a question that doesn't require enough details, you flag it or leave a comment that more information is required. Most importantly, we try to make users back up their answers, because there's a lot of BS and marketing talk in the fitness world. So surely you're not saying you'd rather see the quality of the site go down, just so you don't have to research your answer?
I might be harsh, but I can point you to several other SE-sites where they ended up deciding to ban recommendation topics.
And just to prove my point: here's five minutes of work on your behalf