Comparison

Onetime. vs World 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

World Clock

Easily convert time zones and check the current time in any region worldwide. This tool helps you stay connected with friends abroad, manage international meetings, and plan travel by accurately displaying dates and times across different locations.

Highlights
  • Convert time zones freely
  • Search time in any area
  • Check time for friends abroad
  • Manage international conferences
  • Set up widgets
  • Set theme color
  • Set UTC and standard times
Features
Read full description

Need to know the right time in another city before you call, travel, or schedule a meeting? World Clock-Timezone Converter helps you compare world times and convert any date and time across cities, UTC, and standard time zones. Add the places you care about, check the current time at a glance, or choose a future date to see what that time becomes around the world. It is useful for international meetings, remote teams, family abroad, travel plans, and friends in different time zones. Use widgets for quick access, switch between 12-hour and 24-hour time, check UTC and standard time zones, and choose a theme that fits your phone. Features: - Compare multiple cities and time zones in one list - Convert dates and times across regions - Check UTC, GMT, Zulu time, and standard time zones - Add widgets for fast world time checks - Search many cities and time zone entries - See day and night indicators - Use 12-hour or 24-hour time format - Choose from multiple theme colors - Free to use If you have feedback or need a location added, contact us at appsupport@bokeriastudio.com.

Screenshots

Onetime.4 screens
World Clock4 screens

Verdict

The call

The clearest difference is rating: World Clock at 4.8 against Onetime.'s 3.3. World Clock also leads on review sentiment (87% vs 51%) and update cadence (every 5 weeks vs every 11 months). Onetime.'s advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, in-app purchases and device support 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

World Clock holds the better App Store score, 4.8 against 3.3. That said, the two scores are not equally well evidenced: World Clock has 599 ratings behind it against 42, 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 87% of World Clock's.

UpkeepUpdate frequency

Onetime. ships an update every 11 months, World Clock every 5 weeks. The most recent releases landed on October 20, 2026 and October 19, 2026 respectively.

Scorecard7 real differences · 3 level
Onetime. versus World Clock: the parameters behind the verdict, then further details
ParameterOnetime.World Clock
PriceFreeFree
Rating3.3 (42 ratings)4.8 (599 ratings) — better
Positive reviews51.5% of reviews86.7% of reviews — better
Number of ratings42599 — better
Update frequencyEvery 11 monthsEvery 5 weeks — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree — betterAd-supported
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS13.0 — better15.0
Further details — not scored
Size2 MB32 MB
Age rating4+4+
DeveloperFLUID Design GmbHBokeria

Customer experience

Onetime.

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

World Clock

All ratings599 ratings
Positive94.5%
Neutral2.5%
Negative3.0%
Written reviews45 reviews
Positive86.7%
Neutral2.2%
Negative11.1%

User reviews

Onetime.

From 42 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

World Clock

From 599 App Store ratings

What we love

  • 👍 Simple and intuitive user interface
  • 🆓 Free application with no paywall
  • 🌍 Comprehensive timezone and city database
  • ⚡ Fast app performance and quick load times
  • 🔄 Automatic daylight saving time updates

Room to improve

  • 🐛 Widget displays incorrect or blank times
  • 🐛 Time display stuck or frozen
  • ⚠️ Daylight saving time handling issues
  • 🐛 Night mode compatibility problems
  • 🐛 Screen flickering when scrolling

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

World Clock

Reported bugs

9 issues
  • Widget showing blank screen instead of times
  • Widget time display stuck or frozen
  • Incorrect time display after daylight saving changes
  • Widget not working on night mode
  • Screen flickering when scrolling
Show 4 more
  • Widget configuration not saving properly
  • Date/time truncation in location field
  • Widget disappeared after recent update
  • Widget not displaying multiple cities

Requested features

12 requests
  • Alarm functionality for multiple timezones
  • Larger widget size options (2x2, 3x3)
  • Widget theme/color customization
  • Seconds display in time
  • Real-time minute updates
Show 7 more
  • Reorderable timezone list
  • Reverse time conversion capability
  • MacBook/desktop version
  • Ad-free premium version
  • Better widget transparency controls
  • Improved widget design and modernization
  • Day of week display in custom widgets

In-app purchases

None

Onetime.

No in-app purchases

None

World Clock

No in-app purchases

Questions

Is Onetime. free?
Onetime. is free to download, with no in-app purchases.
Is World Clock free?
World Clock is free to download, with no in-app purchases.
Which has better reviews, Onetime. or World Clock?
World Clock is rated higher. Onetime. averages 3.3 out of 5 from 42 ratings, while World Clock averages 4.8 from 599 ratings.
Do Onetime. or World Clock have ads?
World Clock shows ads; Onetime. does not.
Which is updated more often, Onetime. or World Clock?
Onetime. ships an update every 11 months, and World Clock every 5 weeks. Most recently, Onetime. was updated on October 20, 2026 and World Clock on October 19, 2026.

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