I have a really great suggestion, (use translation if you don't understand)
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Forgive me, my English is not very good.
这个软件的核心作用，它是为了保护用户的眼睛健康，但是，恕我直言，最好的保护眼睛的方式，是有节制的休息。实事上，我也试用过其它相似的软件。
我并不是要说一个简单的时间提醒的功能。重点是我们如何设计一个优秀的提醒方式。我想到了一个很棒的方法。
我们可以用灰度模式，作为提醒的一种方式。这将是一种非常安静，没有打扰的提醒设计。
举例说明：
我们可以设置，60分钟显示彩色模式，在此之后15分钟之内，开始变成灰度模式。那么，用户在发现颜色变成灰度时，大脑会意识到自己应该休息了。The core function of this software, it is to protect the user's eye health, but, with all due respect, the best way to protect your eyes is to have a rest in moderation. As a matter of fact, I have tried other similar software.
I'm not talking about a simple time reminder feature. The point is how we can design a great reminder. I've come up with a great way to do this.
We could use grayscale mode, as a way of reminding. This would be a very quiet, non-intrusive reminder design.
An example:
We can set it up so that it shows color mode for 60 minutes, and within 15 minutes after that, it starts to turn into grayscale mode. Then, the user's brain will realize that he/she should take a break when he/she notices that the colors are turning into grayscale.