To edit photo’s in iPhone you have to have a App such as Photoshop or other App’s but this Cydia Tweak called Photo Edit lets you perform basic editing action directly from the stock Photo’s app. You can rotate an image or apply effects such as grayscale or Sepia.
To use the app tap the sharing menu button while in photo viewing mode, choose the newly added “Edit” option and then you can use the new functions.
No icon are Added to the home screen & there are no Options to configure. You can download this tweak via Cydia from BigBoss repo.