One Alarm

One Alarm is a minimal alarm clock application for iOS.

Drag the minute hand to set the alarm time. Drag or tap the switches to turn the alarm ON/OFF and quickly set AM/PM. A badge on the One Alarm icon will appear and countdown every hour to show approximately how many hours are left until the alarm sounds.

If you’re sick of complicated alarm interfaces, One Alarm is for you. Tapping through multiple menus just to set an alarm is tedious. With One Alarm, you can set an alarm with one tap.

On devices with iOS 4.0 (iPhone 3G and up) and higher, alarms will sound even when the app is closed. You can simply set the alarm and exit the app.

Only Alarm is free for the first 10 days after you begin using it. After 10 days, if you love the app you are welcome to unlock it for 99 cents (via in-app purchase). If not, that’s ok but you won’t be able to set any more alarms. It’s free to try One Alarm, but costs 99 cents if you find it useful and want to keep using it. We think this is fair and hope you do too. As always your support is greatly appreciated.
xo, CW&T


  1. Finally, a simple alarm! Thanks

    no sound on my iPhone or iPad, any idea?

    Posted April 1, 2011 at 5:29 am by Vachik
  2. Thanks! We’ve tested it on iPhones and iPad. Make sure your mute is not on and your volume isn’t too low. The next update will have an alert to notify you if your mute is on or if your volume is too low.

    Posted April 1, 2011 at 6:00 am by cwwang
  3. No longer works on my iPad 1 after iOS 5.0 upgrade. One Alarm comes up with no hands showing and then shuts down in 1.5 seconds.

    Please fix, love this app.

    I did pay for it some time ago


    Posted October 25, 2011 at 1:46 pm by Roger Miller
  4. Thank you so much. One Alarm is working fine now.

    Roger Miller

    Posted October 25, 2011 at 9:26 pm by Roger Miller
  5. From upgrade os5 I can’t unlock.

    I did pay for it times ago.

    Posted November 7, 2011 at 11:00 am by Kaz
  6. Please try updating to the latest version. This was a bug in a previous update, but it should be working in the latest update.

    Posted November 7, 2011 at 2:11 pm by cwwang
  7. Hello,

    I love One Alarm for the simplicity. It will be appreciated if the hour hand can be adjust with two-finger drag.

    Thank you and regards,
    Sect Ione

    Posted December 15, 2011 at 8:47 pm by Sect Ione
  8. Hello. I”ve bought OneAlert in June 2011. But it doesn’t work now, it askes more money. How can I get the program I bought last year?

    Posted June 4, 2012 at 1:17 pm by Sergey Koshurnikov
  9. If you’ve already bought One Alarm, you can choose to buy the instant unlock repeatedly without being charged again.

    Posted June 4, 2012 at 6:08 pm by cwwang

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