My PaintBrush: Paint and Edit at Mac App Store analyse

My PaintBrush is a useful multilayer paint and image editor. Use inspiring tools and brushes to create smooth images. My PaintBrush features highlights: 1 ) Familiar preset tools 
• Erasers, Fill tools, Colorpicker, Zoom In. 
• Straight lines, Curves, Rectangles, Rounded-rectangles, Ellipses. 
• Text: customize font, size, color of text. 
• Palette: set the foreground and background color for tools. 2 ) Build up and manage multiple layers: 
• Merge or combine layers. 
• Set the alpha value of individual layer. 
• Customize the layer to be visible or not. 
• Freely Change the order of layers. 
• Delete unwanted layers. 3) Operations on each layer 
• 10 times undo/redo. 
• Flip horizontally and vertically. 
• Move selected zone 4) Export to: 
• PNG, JPEG, TIFF, BMP, GIF 
• MPB (contains layers information) My PaintBrush Copyright © 2014 - 2019 eTinySoft.Inc. Based on PaintBrush Copyright © 2007-2010 Soggy Waffles. Licensed under the GNU General Public License v3. My PaintBrush source code: https://github.com/hansewu/My-PaintBrush 
Feedback: Any suggestion about My Paintbrush will be appreciated, support email: [email protected]