Your contribution cannot be approved because it does not follow the Utopian Rules.

HARD rules broken:

• A contribution must contain ...benefits of your work to the project owner.

• First of all, this is not a mobile app, this is a toolkit, they don't really need icon. so you should not too focus on icon. because you are proposing a logo (logo is not only icon).
• Your logo is not optically balance.
  
  This project already have a great logotype, the logotype is well made with great kern and contrast (different font width to show contrast)
  

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