At the beginning you should have focused app, that does one thing very well, 10 times better than anyone else. Then (if that sticks) you should gradually add fe

At the beginning you should have focused app, that does one thing very well, 10 times better than anyone else. Then (if that sticks) you should gradually add features, but only if that makes user experience that much better. I've seen a lot of great apps do that and win big time. I think Twitter has a lot of problems with fail whale, so maybe they don't have the time (resources?) to expand their core product.