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How to add countdown widgets on iPhone's Lock Screen
![Setting Up a Countdown Clock - The iPhone Book: Covers iPhone 4S, iPhone 4, and iPhone 3GS, Fifth Edition [Book]](https://www.oreilly.com/api/v2/epubs/9780133016529/files/graphics/07fig08.jpg "Setting Up a Countdown Clock - The iPhone Book: Covers iPhone 4S, iPhone 4, and iPhone 3GS, Fifth Edition [Book]")
Setting Up a Countdown Clock - The iPhone Book: Covers iPhone 4S, iPhone 4, and iPhone 3GS, Fifth Edition [Book]
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Countdown - Pretty Progress on the App Store
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Countdown on the App Store
