I was astounded by snapseed. Depending on what you want to do you might find it quite capable. It has a raw processing engine that works even with new DNG formats and offers a wide variety of color grading options.
Have not tried any image overlay stuff though
For example by locking 2.2 million people in a 45 x 10 km area, taking away any external food supply, forbidding them from working their fields or going fishing and throwing bombs on an area that is populated by 50% under 18 year olds, officially admitting that they target ambulances, refugee camps and the like? According to the UN the people in the Gaza strip are currently at an average 2 slices of bread per person and day. Won’t take much longer until the fighting is over at this rate.