Comparison

Onetime. vs EarthClock Time Zone Converter

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

EarthClock Time Zone Converter

Visually convert time zones with an interactive dial and slide list. Easily see day/night status, dates, and track time across multiple locations. Save events to your calendar or set reminders with a single tap.

Highlights
  • Visual, interactive time conversion display
  • Time travel tool for precise conversions
  • Set native iOS alarms and calendar events
  • Powerful search and custom city labels
  • Detailed time, date, and timezone information
  • Day/night visual cues
Read full description

EarthClock is a visual Time Converter, making timezone conversions easier not just for time, but for understanding important things like: - Is it Day or night there? - Is it yesterday today or tomorrow there? - What’s the Date there at my time? - And of course, track the time later across multiple locations This is very easy with EarthClock - just turn the Dial, or Slide the List! 
Time conversions will automagically appear, along with clear visual cues for Date, Day/Night and the rest. One tap and you can save the time as a Calendar Event or reminder. The difference from most World Time and Time Conversion apps present information as text, and numbers which you need to correlate and think about the numbers. With EarthClock you just need to look! EarthClock is free to use, for up to two cities.  To track more cities and timezones, save Calendar Events and Alarms, get EarthClock+ in-App. ---- KEY FEATURES: Visual, Interactive Time-Conversion Display — Rotate the 24-hour dial to see time conversions live across different time zones. EarthClock’s sleek interactive dial of Earth map and Clocks, provides a visually engaging way to track time around the world. Time Travel: Precise Time Conversion — Convert time directly to a date, time, and place with EarthClocks unique and powerful Time Travel tool. Faster, more detailed and far more intuitive than doing mental maths Set Native iOS Alarms and Calendar events, in one tap — Planning a call or meeting across multiple time zones? EarthClock makes it easy to set reminders, add events to your calendar, or share the best time with others via text or email. Powerful Search & Custom city Labels — Easily find any timezone, country, or major city with our comprehensive database. Can’t find your exact location? No problem! You can rename any timezone to match your city or even label it with emojis for a personal touch. Detailed Time, Date, & Timezone Info — Beyond just showing time, EarthClock provides rich details at a glance. - Instantly see the date to see if its today/tomorrow or yesterday at all locations, - Visually track if its day/night, as well as progress to noon or midnight. - Tap cities to see details like active Daylight Saving time, and edit labels, Download EarthClock today and take the guesswork out of time conversion! Whether you’re scheduling meetings, travelling, or simply curious, EarthClock makes managing time zones easier and more beautiful than ever. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Onetime.4 screens
EarthClock Time Zone Converter4 screens

Verdict

The call

The clearest difference is review sentiment: EarthClock Time Zone Converter at 100% against Onetime.'s 51%. EarthClock Time Zone Converter also leads on rating (4.3 vs 3.5) and update cadence (every 3 months vs every 11 months). Onetime.'s advantage is in-app purchases (none vs 1) and ratings volume (39 vs 6). On price, ads, device support and iOS requirement 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. EarthClock Time Zone Converter sells 1 in-app purchase, starting at $5.99 per year. Onetime. asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

EarthClock Time Zone Converter holds the better App Store score, 4.3 against 3.5. That said, the two scores are not equally well evidenced: Onetime. has 39 ratings behind it against 6, 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 100% of EarthClock Time Zone Converter's.

UpkeepUpdate frequency

Onetime. ships an update every 11 months, EarthClock Time Zone Converter every 3 months. The most recent releases landed on September 17, 2026 and September 18, 2026 respectively.

Scorecard6 real differences · 4 level
Onetime. versus EarthClock Time Zone Converter: the parameters behind the verdict, then further details
ParameterOnetime.EarthClock Time Zone Converter
PriceFreeFree
Rating3.5 (39 ratings)4.3 (6 ratings) — better
Positive reviews51.5% of reviews100.0% of reviews — better
Number of ratings39 — better6
Update frequencyEvery 11 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPod
Requires iOS13.013.0
Further details — not scored
Size2 MB48 MB
Age rating4+4+
DeveloperFLUID Design GmbHSameer Rajadnya

Customer experience

Onetime.

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

EarthClock Time Zone Converter

All ratings6 ratings
Positive83.3%
Neutral0.0%
Negative16.7%
Written reviews10 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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

EarthClock Time Zone Converter

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Onetime.

No in-app purchases

1 purchases

EarthClock Time Zone Converter

Subscriptions1
  • EarthClock+$5.991 Year

Questions

Is Onetime. free?
Onetime. is free to download, with no in-app purchases.
Is EarthClock Time Zone Converter free?
EarthClock Time Zone Converter is free to download, with in-app purchases available.
Which has better reviews, Onetime. or EarthClock Time Zone Converter?
EarthClock Time Zone Converter is rated higher. Onetime. averages 3.5 out of 5 from 39 ratings, while EarthClock Time Zone Converter averages 4.3 from 6 ratings.
Do Onetime. or EarthClock Time Zone Converter have ads?
Neither Onetime. nor EarthClock Time Zone Converter shows ads.
Which is updated more often, Onetime. or EarthClock Time Zone Converter?
Onetime. ships an update every 11 months, and EarthClock Time Zone Converter every 3 months. Most recently, Onetime. was updated on September 17, 2026 and EarthClock Time Zone Converter on September 18, 2026.

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