When comparing DoubleTwist Alarm Clock vs Timely, the Slant community recommends Timely for most people. In the question“What are the best alarm clock apps for Android?” Timely is ranked 1st while DoubleTwist Alarm Clock is ranked 10th. The most important reason people chose Timely is:
A basic version of Timely is free, but you can opt to buy the Premium version for $2.99 that has more themes, sounds and challenges. The premium version also introduces cloud synchronization and disables ads.
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Pros
Pro Nap/egg timer
Lets you quickly set an alarm within 60 minutes.
Pro Alarm fade in
Adjustable fade-in time for alarms.
Pro Beautiful design
Pro Live wallpaper clock
Has a smoothly animated swiss clock with day/night modes.
Pro Sleep cycle alarm
Wakes you up when you're most likely to be between sleep cycles.
Pro Nightstand mode
DoubleTwist Alarm Clock includes a nightstand mode so it can show time all night long.
Pro Flip clock
Pro Sunrise alarm
Wakes you up at local sunrise.
Pro Custom alarm sounds
Allows you to set a random song to wake you up. Alternatively, any ringtone can be used.
Pro Free version
A basic version of Timely is free, but you can opt to buy the Premium version for $2.99 that has more themes, sounds and challenges. The premium version also introduces cloud synchronization and disables ads.
Pro Provides own alarm tones
Over 25 wake up tones come with the app ranging from simple alarm sounds to synthesized music.
Pro Gorgeous display
Timely combines vibrant colors, smooth transition effects, and peaceful animations that make the user experience all the more enjoyable. From the neat scrolling effects to the futuristic looking timer, the artistic touch to this app is outstanding.
Pro Simple user interface
This app makes setting up alarms intuitive. A list of all alarms are displayed in one place that provides detail on when the time of the alarm, if it's enabled, and even what tone will play when the alarm sounds. There is no difficulty in figuring out how to use all of its features. Timely displays icons that make it easy for users to set new alarms, switch to nightstand or timer mode, or even find out what the "Smart Rise" feature is.
Pro Can be fixed to work with Android 10/11
Pro Alarms synchronization
Set the alarm time on any devices and all synced devices (you can chose) will ring simultaneously. Turning off the alarm on one device stops all of them.
Pro Timer and stopwatch included
Everything is so simple! Please make it work with Android 10.
Pro Custom themes
Timely comes with many different themes to use, and even comes with a feature to design your own colored themes.
Pro Comes with lock-screen widgets
Pro Wake up tasks
4 possible wake up tasks are allowed to be enabled. In order to shut off the alarm, the user must complete the set task(s).
Cons
Con Alarms no longer sound when using Android 10
Alarms will trigger but sound is disabled under Android 10's new silent notifications section. App needs an update to support this, and it's been stagnant since 2017.
Con Pricey at $3.99
Con Not compatible with Android 10
The alarm app does not pop-up when it rings. Without the app GUI, you can't dismiss the alarm. So you have to launch manually the app when it rings to dismiss.

Con Development stopped
Company has been bought by Google and development has been stopped since then.
Con Alarm does not work at all in Marshmallow
If you have Android 6.0 Marshmallow, this app is useless as an alarm.
Con Cannot use custom alarm sounds
It's not possible to have Timely play your favorite .mp3 to wake you up, or any other custom sound file for that matter.
