Best Screenshot/Screen Capture App

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http://androidforums.com – Using N4 with 4.2.1 When I use the built in screenshot (power button + holding volume down) - the screenshot looks awesome. But when I send it as an mms to my friend (who also has the exact same phone) the picture is significantly degraded. The same happens when he sends me a screenshot. Is this an issue with my MMS settings? the built in screenshot app? Or should I download a new screenshot app? If so, which is the best one? Thanks. (General)