Comparison

Onetime. vs Chrono

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

Chrono

Easily track time across multiple global locations with this intuitive application. Manage a custom list of world clocks, add numerous locations, and even rename them for clarity. A convenient widget provides quick access to time information, helping you stay connected across different time zones.

Highlights
  • Manage a list of world clocks
  • Extensive location selection
  • Customizable clock names
  • Convenient widget
  • Timezone comparison
  • 24/12 hour format option
Features
Read full description

Travel a lot? Have friends or family in another timezone? Want to know what time it is somewhere else on the planet? Features: * Manage a list of world clocks * Lots of locations to choose from * Rename your clocks to something meaningful * A handy widget to save you time * Simple, easy to use interface * Additional timezone information for certain locations * See if a timezone is yesterday, today or tomorrow from where you are * Change time from 24 hour to 12 hour time * Compare time in other time zones and your own by scrolling into the future or back into the past

Screenshots

Onetime.4 screens
Chrono4 screens

Verdict

The call

The clearest difference is rating: Chrono at 4.0 against Onetime.'s 3.5. Onetime.'s advantage is review sentiment (51% vs 38%) and ratings volume (39 vs 8). 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

Chrono holds the better App Store score, 4.0 against 3.5. Both are backed by a comparable volume of ratings — 39 and 8 respectively. Written reviews complicate that: 51% of Onetime.'s written reviews are positive against 38% of Chrono's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Onetime. ships an update every 11 months, Chrono every 8 months. The most recent releases landed on September 30, 2026 and October 1, 2026 respectively.

Scorecard3 real differences · 7 level
Onetime. versus Chrono: the parameters behind the verdict, then further details
ParameterOnetime.Chrono
PriceFreeFree
Rating3.5 (39 ratings)4.0 (8 ratings) — better
Positive reviews51.5% of reviews — better38.5% of reviews
Number of ratings39 — better8
Update frequencyEvery 11 monthsEvery 8 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS13.012.1 — better
Further details — not scored
Size2 MB10 MB
Age rating4+4+
DeveloperFLUID Design GmbHSebastian Connan

Customer experience

Onetime.

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

Chrono

All ratings8 ratings
Positive75.0%
Neutral12.5%
Negative12.5%
Written reviews13 reviews
Positive38.5%
Neutral23.1%
Negative38.5%

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

Chrono

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Onetime.

No in-app purchases

None

Chrono

No in-app purchases

Questions

Is Onetime. free?
Onetime. is free to download, with no in-app purchases.
Is Chrono free?
Chrono is free to download, with no in-app purchases.
Which has better reviews, Onetime. or Chrono?
Chrono is rated higher. Onetime. averages 3.5 out of 5 from 39 ratings, while Chrono averages 4.0 from 8 ratings.
Do Onetime. or Chrono have ads?
Neither Onetime. nor Chrono shows ads.
Which is updated more often, Onetime. or Chrono?
Onetime. ships an update every 11 months, and Chrono every 8 months. Most recently, Onetime. was updated on September 30, 2026 and Chrono on October 1, 2026.

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