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想开发一个早睡早起的软件，大家觉得有市场吗？
source link: https://www.v2ex.com/t/517564
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问与答 - @yang59324 - 设计产品的目的：改变大家晚睡的习惯，养成早睡早起的习惯开发一种 app，用户注册后交 1000 押金，设定 23 点到 7 点不能连 wifi，不能用 4G，不能玩啥游戏，看视频（只能打电话、
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