You can also use apps like Offtime or Unplugged to create tech free zones by strategically scheduling automatic airplane modes.

你也可以使用 Offtime 或 Unplugged 这样的应用程序，有策略地安排自动飞行模式来创建无科技区域。

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You can also use apps like Offtime or Unplugged to create tech-free zones by strategically scheduling automatic airplane modes.

你也可以使用像 Offtime 或 Unplugged 这样的应用程序，通过有策略地安排自动飞行模式来创建无科技地带。

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It's one of the most widely used free photo editing apps in the world.

它是世界上使用最广泛的免费图片编辑应用程序之一。

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Developers can use the money made from advertising to keep their apps free and increase the number of downloads.

FORBES: A Call For Socialism In The App Economy

Many developers are experimenting with one or more of these options to make revenue and keep their apps free.

FORBES: A Call For Socialism In The App Economy

With the extra revenue, they can keep apps free.

FORBES: How To: Advertising On An Intimate Device