10 Best Atomic Alarm Clock in 2021 – Ready

The atomic alarm clock is known for its accuracy. As the name suggests, an alarm clock is a variant of a clock that comes with alarm features. It wakes people up at a specified time or even alerts people at a specific time. While on a classic desktop analog alarm clock an additional dialer and hand are given so to set an alarm, in modern digital clocks you can set it via the use of buttons. In smartphones or digital watchers, you can set the alarm also using voice commands. Nowadays alarm feature is also included in Smart TVs, MP3 players and computers.

Just like WIndow based atomic alarm clock software, Emerson, Dreamsky, and La Crosse are some of the popular brands known for their ergonomic and feature-rich desktop alarm clock. While atomic alarm clocks can only work on a computer, a desktop digital clock can provide a 24/7 service without relying on any computers.  Our team has conducted thorough market research and curated a list of the best atomic alarm clock as well as their alternatives. In our research, we have compared 35+ digital alarm clocks. We have also gone through 5000+ user comments to establish the claim made by all the shortlisted products. 

Our top pick for the below-provided list is the Emerson alarm clock which comes with a USB port and Bluetooth connectivity.  It also comes with a wireless charger for compatible Apple iPhones and Samsung Galaxy phones.

Top 3 best atomic alarm clock

5/5
La Crosse Technology 616-146 Color Projection Alarm Clock with Outdoor temperature & Charging USB port

La Crosse Technology 616-146 Color Projection Alarm Clock

4/5
DreamSky Compact Digital Alarm Clock with USB Port for Charging, Adjustable Brightness Dimmer, Blue Bold Digit Display, Adjustable Alarm Volume, 12/24Hr, Snooze, Bedroom Desk Alarm Clock.

DreamSky Compact Digital Alarm Clock with USB Port for Charging

4.6/5
Emerson Alarm Clock Radio and QI Wireless Phone Charger with Bluetooth, Compatible with iPhone XS Max/XR/XS/X/8/Plus, 10W Galaxy S10/Plus/S10E/S9, All Qi Compatible Phones, ER100202

Emerson Alarm Clock Radio and QI Wireless Phone Charger

Top 10 best atomic alarm clock

  • Wireless mobile charger on top of clock, simply drop and charge.
  • Also includes a USB port for additional mobile, tablet etc charging (2.1a 5V)
  • Bluetooth 5.0 technology for easy pairing
  • Automatically sets itself to the correct year, Month, date, day and time as soon as you plug it in and after every power interruption
  • Button cell battery (included) maintains time & Alarm settings
Emerson Alarm Clock Radio and QI Wireless Phone Charger with Bluetooth, Compatible with iPhone XS Max/XR/XS/X/8/Plus, 10W Galaxy S10/Plus/S10E/S9, All Qi Compatible Phones, ER100202
  • Large Display Plug in Clocks with Smart Dimmer: Compact Streamline design yet large number display. 2” jumbo illuminated LED digits ensure the time is easy to see even for impaired vision people. The patented smart brightness dimmer design allows you set the brightness of display from 0-100 level by easy turn wheel. Needless worry the brightness, either too bright thus affecting your sleep or too dark to read time.
  • Adjustable Alarm Sound: Single alarm setting with 9 minutes snooze. No harm “ beep” alarm sound can be set from 30-90 DP as person preference . Needless worry the alarm sound, either too loud thus frightening you or too low to wake you up from deep sleeping. One simple ON/OFF button allows you disable the alarm on weekend.
  • USB Charging Port: Convenient USB port allows you to charge your smartphone , ipad or other smart device without plug in wall. handy, convenient and organized.
  • Easy Operation Clock: Intuitive setting button, experience zero stress when setting the time or alarm. Easy for kids, seniors and the elderly.
  • Outlet Powered with Memorized Battery Backup : Plug in to power the clock with the included DC adapter . 2* AAA batteries ( not included ) needed for storing time and alarm settings in case of power outage. With backup battery power source only, the screen will go blank and alarm will not sound.
DreamSky Compact Digital Alarm Clock with USB Port for Charging, Adjustable Brightness Dimmer, Blue Bold Digit Display, Adjustable Alarm Volume, 12/24Hr, Snooze, Bedroom Desk Alarm Clock.
  • Color LCD and nighttime backlight
  • Project time and/or outdoor temperature on ceiling or wall
  • 90 degree arm rotation,7 time zone settings
  • Please refer the User Manual under product description for installation and trouble shooting steps
  • Wireless outdoor temperature and monitors indoor temperature
La Crosse Technology 616-146 Color Projection Alarm Clock with Outdoor temperature & Charging USB port
  • Atomic self-setting time and date with automatic Daylight saving time reset
  • USB charging port for mobile devices (charge cable not included)
  • Indoor temperature & humidity with trend arrows
  • Adjustable backlight settings
  • Moon phase icons
La Crosse Technology 617-1485B Atomic Color Alarm Clock with USB Charging Port
Sharp Atomic Desktop Clock with Color Display - Atomic Accuracy - Easy to Read Screen with Calendar & Day of Week Time/Date Display - Auto Set Digital Dual Alarm Clock - Perfect for Nightstand or Desk
  • COLOR ATOMIC DUAL ALARM CLOCK - Accurate to the Second! The Atomic Clock has a built in receiver that automatically synchronizes itself with the WWVB radio broadcast by the US Government’s National Institute of Standards and Technology (NIST) in Fort Collins, Colorado. The Atomic Clock will always be accurate to within on second as it receives daily WWVB updates.
  • COLOR CALENDAR & DAY OF WEEK DISPLAY - Always know what day of the week it is with a quick glance. The clock displays the calendar and the day of the week. Using the Snooze/Dimmer switch on top of the display, you can easily adjust the display brightness to your liking.
  • EASY TO SET DUAL ALARM - Set alarm for two people, or set one alarm for weekdays and the other for weekend!. Snooze/Dimmer Switch is simple to use and on top of the display.
  • "NO WORRY" BATTERY BACK-UP - There is a "No Worry" battery back-up option (requires 2 x AAA battery, sold separately), that will allow the alarm to go off, even if the power goes out. The battery back-up stores the time and alarm settings if the power is interrupted. During battery back-up the clock’s display will not be lit. Once power is restored, the display will re-light.
  • VARIABLE BACKLIGHT ON DEMAND - Press the snooze button on top of the clock to activate the 3-Step Dimmer Control, illuminating the whole display for 5 seconds. The backlight will also illuminate when the alarm sounds.
  • EASY TO SET: 3 simple steps and wait for the correct time to set (for more details, check the “Product Description” below). Clock size: 3.8" x3.2" x1.0"; Base depth: 1.3”.
  • SELF-SETTING W/ 4 TIMEZONES: Atomic clock receives radio time signals from Colorado and updates itself with accurate time and date. 4 timezones (P/ M/ C/ E) selectable.
  • BATTERY OPERATED: hito digital bedside alarm clock works with 2x AA batteries.
  • GLOW IN THE DARK: hito atomic alarm clock features an light sensor which activates soft ambient backlight when it is dark. Make sure to turn the switch on in the battery compartment.
  • INDOOR TEMPERATURE: This clock also displays indoor temperature (Fahrenheit/ Celsius).
HITO 3.8' Digital Battery Atomic Alarm Clock Bedside Travel Auto Time Set Auto Night Light Date Day Indoor Temperature 4 Timezones for Bedroom Office Desk
  • Simple Alarm Clock with Snooze: The classic alarm noise is perfect for kids, adults, or elders with the snooze button on top
  • Integrated USB Port (1.5a): This allows you to wake up to a fully charged phone, tablet, or other 5V electronics
  • Vibrant Color Display: The display quickly displays the current date as well as the current moon phase
  • Outlet Powered with Battery Backup: Preserves the alarm in the event of any power outages
  • Clever Designed USB Alarm Clock: This clock is cleverly designed to feature indoor temperature and humidity weather it placed in a hotel or bedroom with its auto-dim feature
AcuRite Intelli-Time Alarm Clock with USB Charger, Indoor Temperature and Humidity (13040CA), 0.8, White
  • Large Display with Full Range Dimmer: 6.6“ Large LCD screen with nice eye care number display. Time, date and temperature display. Almost full range brightness settable (6 levels + auto dim ), you can easily change to have the view bright or dim it to extremely low.
  • Advance autoset time : The alarm clock will set itself to right time, date and temperature immediately once plugged in. The long lasting button cell backup battery (installed ) will holds all settings and ensure the time always be accurate in case of main power interrupted. What you need to do is set your time zone and wake up time. Simple as that. Even miss the right time, you are still able to set it manually.
  • Auto DST and selectable time zone : Automatically adjusts to Daylight Savings Time while set the DST on .Seven USA time zone (EST/ CST/ MST/ PST/AST/HAT/AKT) and one newfoundland time zone NST selectable for your location.
  • Ascending beeping alarm with snooze: Ascending alarm sound wake you up naturally . Additional snooze to counter oversleeping, simply press the snooze button once and go back to sleep. 8 minutes later the alarm will ring again .
  • Plug in clock with USB charging port: Powered by USB port by plug in outlet. Extra USB charging port for charging cellphone and other electronic device. 3*AA batteries( not included) as backup, which will store the setting and keep the time works in case of main power outage.
DreamSky Auto Set Digital Alarm Clock with USB Charging Port, 6.6 Inch Large Screen with Time/Date/Temperature Display, Full Range Brightness Dimmer, Auto DST Setting, Snooze, Backup Batteries,12/24Hr
  • Elegant alarm clock with 100% adjustable display: 4.3 Inches large LCD screen displays eye easy catch blue digit, time and content are easy to read at a glance. 0%-100% adjustable display full range dimmer enable you to set the brightness of display to a comfortable level at will.
  • Advance autoset time: The clock will sets itself to the correct time once plug in, hassle free to set time. Cell button battery included as backup battery, which will store the time, date and alarm setting during main power outage, however it will not support the time display nor trigger the alarm.
  • Auto DST and selectable time zone: Automatically adjusts to Daylight Savings Time while set the DST on. Four USA time zone selectable per your location (EST/ CST/ MST/ PST).
  • Ascending soft beeping alarm with snooze: Ascending alarm sound wake you up naturally. Additional snooze to counter oversleeping, simply press the snooze button once and go back to sleep. 8 minutes later the alarm will ring again.
  • Plug in clock with USB ports: one USB port connect the DC adapter (included) power on the clock. Let the other port charging your smart device like cellphone, tablet and mp3 players etc. Convenient and organized.
DreamSky Auto Time Set Alarm Clock with Snooze & Full Range Dimmer 0-100% Adjustable Brightness, USB Charging Port, Auto DST, 4 Time Zones Alarm Clocks for Adult Kids Bedrom
  • Atomic Alarm Clock - The Atomic Clock has a built in receiver that automatically synchronizes itself with the WWVB radio broadcast by the US Government’s National Institute of Standards and Technology (NIST) in Fort Collins, Colorado. The Atomic Clock will always be accurate to within on second as it receives daily WWVB updates.
  • Wall Mountable and Table Top Use - The clock may be hung on the wall using the hang hole at the back of the clock or displayed on your nightstand by pulling out the backstand. 3 x AAA batteries Needed (not included)
  • Calendar and Day of Week Display - Always know what day of the week it is with a quick glance. The clock displays the calendar and the day of the week.
  • Indoor Temperature Display - Get the real time indoor temperature of your room displayed on your clock.
  • Backlight on Demand - Press the snooze button on top of the clock to illuminate the whole display for 5 seconds. The backlight will also illuminate when the alarm sounds.
Sharp Atomic Desktop Clock – Auto Set Digital Alarm Clock - Atomic Accuracy - Easy to Read Screen with Time/Date/Temperature Display- Perfect for Nightstand or Desk

Frequently Asked Questions

These ATOMIC CLOCK has a TIME button on the lower left with 12/24 showing below the button. I tried to check the clock’s ability to display the 12 and 24 hour modes.

It only illuminated when you press the Snooze/Light button, and only for a few seconds. Otherwise it is dark.