Comparison

Onetime. vs UNIMATIC 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

UNIMATIC World Clock

Easily view and convert time zones for cities worldwide. Coordinate meetings, schedule events, and share times instantly with friends and family across the globe. Access over 160,000 cities and major time zones.

Highlights
  • Global time access
  • Easy time conversion
  • Calendar event integration
  • Instant time sharing
  • Extensive city database
Read full description

UNIMATIC World Clock: Master Global Time Embrace UNIMATIC's dedication to simplicity and precision with the UNIMATIC World Clock app. Easily coordinate with colleagues, friends, and family around the globe. Essential Features: Global Time Access: Instantly view accurate times for cities worldwide. From New York to Tokyo, stay connected effortlessly. Easy Time Conversion: Swipe to convert and compare time zones. Schedule international meetings without hassle. Confident Scheduling: Quickly add events to your calendar. Plan global activities with confidence. Instant Sharing: Share specific times via email, text, or social media. Coordinate smoothly with others. Extensive Database: Explore over 160,000 cities and major time zones like GMT, UTC, EST, and PST. Why Choose UNIMATIC World Clock? Inspired by Unimatic's principles of simplicity and functionality, this app is more than a world clock—it's a vital tool for today's global citizen. Connect with the world reliably and in style.

Screenshots

Onetime.4 screens
UNIMATIC World Clock4 screens

Verdict

The call

The clearest difference is rating: UNIMATIC World Clock at 4.6 against Onetime.'s 3.3. UNIMATIC World Clock also leads on review sentiment (80% vs 51%) and update cadence (every 2 months vs every 11 months). On price, ratings volume, 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

UNIMATIC World Clock holds the better App Store score, 4.6 against 3.3. Both are backed by a comparable volume of ratings — 42 and 53 respectively. Written reviews point the same way: 51% of Onetime.'s written reviews are positive against 80% of UNIMATIC World Clock's.

UpkeepUpdate frequency

Onetime. ships an update every 11 months, UNIMATIC World Clock every 2 months. The most recent releases landed on October 20, 2026 and September 22, 2026 respectively.

Scorecard3 real differences · 7 level
Onetime. versus UNIMATIC World Clock: the parameters behind the verdict, then further details
ParameterOnetime.UNIMATIC World Clock
PriceFreeFree
Rating3.3 (42 ratings)4.6 (53 ratings) — better
Positive reviews51.5% of reviews80.0% of reviews — better
Number of ratings4253 — better
Update frequencyEvery 11 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPod
Requires iOS13.013.0
Further details — not scored
Size2 MB43 MB
Age rating4+4+
DeveloperFLUID Design GmbHAlex Komarov Inc.

Customer experience

Onetime.

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

UNIMATIC World Clock

All ratings53 ratings
Positive90.6%
Neutral1.9%
Negative7.5%
Written reviews5 reviews
Positive80.0%
Neutral0.0%
Negative20.0%

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

UNIMATIC World Clock

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Onetime.

No in-app purchases

None

UNIMATIC World Clock

No in-app purchases

Questions

Is Onetime. free?
Onetime. is free to download, with no in-app purchases.
Is UNIMATIC World Clock free?
UNIMATIC World Clock is free to download, with no in-app purchases.
Which has better reviews, Onetime. or UNIMATIC World Clock?
UNIMATIC World Clock is rated higher. Onetime. averages 3.3 out of 5 from 42 ratings, while UNIMATIC World Clock averages 4.6 from 53 ratings.
Do Onetime. or UNIMATIC World Clock have ads?
Neither Onetime. nor UNIMATIC World Clock shows ads.
Which is updated more often, Onetime. or UNIMATIC World Clock?
Onetime. ships an update every 11 months, and UNIMATIC World Clock every 2 months. Most recently, Onetime. was updated on October 20, 2026 and UNIMATIC World Clock on September 22, 2026.

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