Onetime. vs Chrono
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
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.
- Manage a list of world clocks
- Extensive location selection
- Customizable clock names
- Convenient widget
- Timezone comparison
- 24/12 hour format option
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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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
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.
| Parameter | Onetime. | Chrono |
|---|---|---|
| Price | Free | Free |
| Rating | 3.5 (39 ratings) | 4.0 (8 ratings) — better |
| Positive reviews | 51.5% of reviews — better | 38.5% of reviews |
| Number of ratings | 39 — better | 8 |
| Update frequency | Every 11 months | Every 8 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 13.0 | 12.1 — better |
| Further details — not scored | ||
| Size | 2 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | FLUID Design GmbH | Sebastian Connan |
Customer experience
Onetime.
Chrono
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
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- 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
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- 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
Onetime.
No in-app purchases
Chrono
No in-app purchases









