Oh, as for saying more of the app icon design, I think it's not simple enough.

If you just want to sell the app for the moment instead of making it a career, it's totally fine. However, if you want it to be potential in the future, I suggest you not to ignore the app icon even if your app is very outstanding already.

From my perspective, a good app icon should be simple AND has MEANING. The meaning here does not only stand for the meaning of the app itself, but, which is more important, the essence and the spirit of your productS. If you noticed, I used "products" not "product". I want to say that, like Google, Apple, Evernote, etc., a good icon needs to be inclusive in design, which makes your company transferable and changeable in it's way to success, and makes it Not weird for people to see when you will come out new products which are not quite related to your existing products. Take apple and dell for example, you never feel strange to buy a cell phone from Apple but no one would like to buy a phone from dell but they are both PC companies in fact.

In one word, it's a matter of way of expressing enterprise spirit, but please don't ignore the app icon(company symbol as well), which gives people first and foremost prediction of your product or company.

Based on this ideology, your app icon is narrowly-defined but it's good enough for this app alone.

I didn't plan to say this much in my original post. I just felt not so comfortable with the definition. But I like your app, this product. And you are a startup built by Chinese ( I'm too) and I want to start a business on my own someday as well (still a student...), so I'm trying to be helpful if I could.

Good luck on your way to success buddy,

Best,

Jason Hu

Both the app icon and the picture shown immediately when you open the app for the first time.

Do you refer to app icon, or just button icon?

Yeah,thanks so much for your suggestions. Do you have further suggestion about icon, I think I would look for a good designer to make a impressive icon.