Screentaker就能解决你的这些问题，它是一个Mac应用程序。这款软件出来已经有一段时间了，也许你已经使用过它。它能够提供一个最简洁的方法来让你的截图看起来更专业。

Screentaker

v1.3 Mac OS X | 3.8 MB

Screentaker is a small utility that makes creating nice screenshots for iOS apps easier by letting you apply effects to them. Simply drop the screenshot on Screentaker or even capture a screenshot from the iOS Simulator and choose the desired device, orientation and effect. The app is smart enough to detect the device and orientation automatically. You can also download and install effects other users have created or create your own effects.

Capture from iOS Simulator

Apply effects to your screenshots

Download and install new effects

Create your own effects

Screentaker - Simple screenshot taking and editing for iOS apps.

What's New in Version 1.3

The preview image can now be dragged to the Finder or other apps.

Added support for the iPhone 5c and iPhone 5s, the iPad Air and the new iPad mini.