Comparison

Onetime. vs Clock

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Onetime.

Visualize multiple world time zones on a single, intuitive dial. This app simplifies international scheduling and communication by displaying cities as they move through day and night, automatically handling daylight saving changes. Effortlessly find the perfect time for calls or to connect with loved ones globally.

Highlights
  • Single, easy-to-read time zone dial
  • Visualizes cities moving through day and night
  • Automatic daylight saving time adjustments
  • Timetravel™ feature for scheduling
  • Shareable time invites
Features
Read full description

One world. Onetime. Finally, a world clock that integrates all time zones into one easy-to-read dial. We are all living and working globally more and more, so we needed a way to simply see the time in cities around the world at a glance. That’s how Onetime was born. Built on the metaphor of the earth’s rotation, Onetime displays all the cities that matter to you as they move through the day and night in a natural, clockwise direction referencing the international date line. Whether you are scheduling an international call or checking to see what time it is back home, Onetime is the clock for you. No more mistakes adding and subtracting hours, no more confusing GMT numbers, no more remembering daylight savings calendars. Onetime takes care of it all, automatically. And with Timetravel™, you can fly through time so that you quickly find the right moment to schedule that important teleconference with your international colleagues or catch your loved ones before their bedtimes. The „Share“ feature lets you choose a date with TimeTravel and send an invite via message or email. Give up your wall of newsroom clocks and switch to Onetime today. Onetime. By FLUID. ABOUT FLUID Onetime was created by the award-winning design firm FLUID. With our locations in Munich and Silicon Valley and our international client base, the FLUID team is a heavy Onetime user, too.

About

Clock

This app helps you manage your time across devices. It offers features like a world clock for global time zones, customizable alarms with music options, a stopwatch for measuring durations, and timers for countdowns.

Highlights
  • World Clock for global time zones
  • Customizable Alarms with music
  • Stopwatch with lap recording
  • Multiple Timers with labels
  • Sleep schedule integration
Features
Read full description

Clock helps you manage your time on iOS, iPadOS and macOS. Check the current time anywhere with World Clock, make sure you wake up on time with Alarms, or keep track of passing time with Stopwatch and Timers. World Clock Check the current time in cities around the world. Or quickly see the time difference compared to your local time to make coordinating across time zones easy. Alarms Set regular alarms for any time of day. Choose to set them to repeat on specific days, give them a label and select the sound that plays with each. When your alarm goes off, you can choose to play from a selection of sounds, or pick a song from your Apple Music library. You can also adjust your wake up alarm and sleep schedule from Health right in the Clock app so you can wind down with a Sleep Focus and make sure you always wake up on time. Stopwatch Measure the duration of an event. You can see how much time has lapsed with either a digital or analog stopwatch face, and you can quickly record laps or splits throughout the time. Timers Count down seconds, minutes or hours. Or count down using multiple timers, and add labels and distinct sounds to each. You can also choose to set a timer that stops any music playing in the background—perfect for getting to sleep with your favorite playlist.

Screenshots

Onetime.4 screens
Clock3 screens

Verdict

The call

The clearest difference is rating: Onetime. at 3.5 against Clock's 2.5. Onetime. also leads on review sentiment (51% vs 14%). Clock's advantage is ratings volume (20K vs 39) and iOS requirement (10.0 vs 13.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Onetime. holds the better App Store score, 3.5 against 2.5. That said, the two scores are not equally well evidenced: Clock has 20K ratings behind it against 39, so its average is the more settled of the two. Written reviews point the same way: 51% of Onetime.'s written reviews are positive against 14% of Clock's.

UpkeepUpdate frequency

Onetime. ships an update every 11 months, Clock every 9 months. The most recent releases landed on September 17, 2026 and September 25, 2026 respectively.

Scorecard4 real differences · 6 level
Onetime. versus Clock: the parameters behind the verdict, then further details
ParameterOnetime.Clock
PriceFreeFree
Rating3.5 (39 ratings) — better2.5 (20K ratings)
Positive reviews51.5% of reviews — better14.3% of reviews
Number of ratings3920K — better
Update frequencyEvery 11 monthsEvery 9 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS13.010.0 — better
Further details — not scored
Size2 MB5 MB
Age rating4+4+
DeveloperFLUID Design GmbHApple

Customer experience

Onetime.

All ratings39 ratings
Positive59.0%
Neutral2.6%
Negative38.5%
Written reviews134 reviews
Positive51.5%
Neutral5.2%
Negative43.3%

Clock

All ratings19,552 ratings
Positive33.0%
Neutral6.8%
Negative60.2%
Written reviews4,265 reviews
Positive14.3%
Neutral8.7%
Negative77.1%

User reviews

Onetime.

From 39 App Store ratings

What we love

  • ✨ Beautiful and elegant design
  • 👍 Intuitive and easy to use interface
  • 🌍 Great for visualizing time differences
  • 💡 Unique and innovative visualization
  • ✅ Works well for scheduling

Room to improve

  • 🐛 Data quality issues (incorrect times)
  • 🐛 Inability to add cities
  • 🐛 App crashes or freezes
  • 🐛 City search not working
  • 🐛 Some cities not recognized

Clock

From 20K App Store ratings

What we love

  • 🚀 Useful app
  • 👍 Good alarm clock
  • ✨ Interesting experience
  • 🕰️ Helpful for timekeeping

Room to improve

  • 🐛 Alarm issues
  • 🔇 Quiet/silent alarms
  • 🕰️ Lack of customization
  • 🤯 Frustrating bugs
  • 🕰️ Unreliable timer

Bugs and requests

Onetime.

Reported bugs

8 issues
  • Incorrect time zone data for some cities (e.g., Taipei, São Paulo)
  • App freezes when trying to add cities
  • City search function not working ('No cities found')
  • App crashes on launch after updates
  • Time travel feature stops working with certain cities
Show 3 more
  • Scrolling back and forth in time no longer possible
  • App not working with latest iOS versions
  • Default 'My Time' zone cannot be removed

Requested features

9 requests
  • Ability to add descriptive labels for cities
  • Ability to add GMT/UTC time
  • Ability to add time zones manually
  • Homescreen widgets
  • Ability to toggle cities instead of removing
Show 4 more
  • iPad version
  • Tutorial on first launch
  • Option to reverse view horizontally
  • Ability to search future dates

Clock

Reported bugs

3 issues
  • Alarms not going off or being silent
  • Alarms disappearing or turning off on their own
  • Timer issues like not showing countdown or not working properly

Requested features

6 requests
  • Ability to set alarms for specific dates
  • Option to silence all alarms for a period
  • More customization for alarm sounds and snooze
  • Separate volume control for alarms
  • Ability to group and manage alarms
Show 1 more
  • Display seconds in digital clock view

In-app purchases

None

Onetime.

No in-app purchases

None

Clock

No in-app purchases

Questions

Is Onetime. free?
Onetime. is free to download, with no in-app purchases.
Is Clock free?
Clock is free to download, with no in-app purchases.
Which has better reviews, Onetime. or Clock?
Onetime. is rated higher. Onetime. averages 3.5 out of 5 from 39 ratings, while Clock averages 2.5 from 20K ratings.
Do Onetime. or Clock have ads?
Neither Onetime. nor Clock shows ads.
Which is updated more often, Onetime. or Clock?
Onetime. ships an update every 11 months, and Clock every 9 months. Most recently, Onetime. was updated on September 17, 2026 and Clock on September 25, 2026.

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