Wake-up call (service)
The phrase has been used to describe a sign or warning that alerts one to negative or dangerous behavior or circumstances. In east Asia, a wake-up call is commonly known as a "morning call."
Several online services have been built for wake up call phone reminders such as Wakeup.io at https://wakeup.io and iping at www.iping.com
- The American Heritage Dictionary. Boston: Houghton Mifflin, 2000, ISBN 978-0-395-82517-4.
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