A good app for iPhone for drawing on photos?

I need an app that can draw a straight line. Like how you can do on drawing on the computer, thanks

I think you can try Fotor, it's a free online photo editor software. Also have app in appstore.
very esay and have many features
you can try it online or download it.
http://www.fotor.com/,
hope you like it!

  • What's a good DRAWING app for iPhone? ALSO! Do you have any suggestions of some other mobile device that allows me to draw with a HARD tip stylus? It's hard for me to draw precisely with my FINGER (the iPhone doesn't let me draw on it with a regular hard tip pointed stylus).
  • What are some good DRAWING apps for the iPhone? ALSO! Could you please also suggest another portable device/gadget other than the iPhone that allows me to draw with a pointed, hard-tip plastic stylus. The iPhone only lets me draw with my finger, and my drawings look very inaccurate when I draw on the iPhone because my finger is so big.
  • USB drawing too much power from mac? When i plug my iphone 5 into my mac with the charger it came with and nothing else in the other USB port it says "Because a USB device was drawing too much power from your computer, one or more of your USB devices have been disabled. To prevent damaging your computer, the USB device drawing too much power has been disabled. Other devices may have also been disabled. When you disconnect the device drawing too much power, your other USB devices will be enabled again."
  • Tips for drawing on iphone apps? So i installed an app to draw some stuff and i well honestly suck at drawing on anything except paper and pencil. I'm wondering if anyone has tips on how i would use my app. I can't erase my base correctly without effing the whole thing up. I'm drawing an anime style head portrait