World Clock vs ZoneTrekker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
World Clock
Easily calculate time differences worldwide by scrolling a dynamic time bar. Add any city, set specific dates and times, and plan international meetings or calls without manual calculations. The app syncs with iOS time data.
- Dynamic scrolling time bar
- Add and manage cities
- Direct date and time specification
- Customizable city names
- Time unit adjustment (minute/hour)
Read full descriptionHide full description
"World Clock" is the best app to calculate time differences all over the world. All cities' times change automatically just by scrolling it with your finger. Therefore, you don't need to add or subtract times any more to calculate time differences. ■■Features■■ -Scrolling the time bar on the side of the screen up and down simultaneously changes the time in each city to the future or past. -Double-tap the time bar to change the time unit between 1 minute and 1 hour. -You can add any city from the list of cities provided in the app. -Tap each city to specify the date and time directly. -Press and hold on a city to change the city and edit the custom name. -Only one fixed city can be displayed at the top of the screen. ■■Examples of use■■ -International meeting planner -International call -Trip planning Disclaimer:This application has been built with extreme care and attention. However, it does not guarantee the accuracy of the names and times of the cities displayed. Please note that we are not liable whatsoever for any profit loss, or any other form of loss experienced by the customer from using this application. ※We don't have any time difference data in our app. We have been inquiring about time differences of each city to iOS. Therefore, “World Clock” shows you the time of iOS. As a result, depending on the version of iOS you are using, the exact time may not be displayed. If you find a time lag in our app, please confirm default "Clock" app on your iPhone. If the time in "Clock" app is the same with the time in our “World Clock”, it means that our app is running normally. ※Abbreviated name of time zone was originally researched and added. If you notice any mistakes, please contact us from the support site. ※The screenshots are specially edited not to show ads.
ZoneTrekker
Track local time, weather, holidays, and timezones for any location worldwide. Customize lists, set alarms, and compare time differences with visual aids. Get detailed weather history and holiday information.
- Customizable location lists
- Real-time local time and weather
- Public holiday tracking
- Timezone comparison charts
- Location-based alarms
- 24-hour weather history
Read full descriptionHide full description
At a glance - local time, weather, public holidays, timezone comparisons and location alarms for any list of locations around the world Create your own custom list of locations that you are interested in Uses color coding to show working hours, non-working hours, nigh-time and public holidays - Main screen A custom list of locations of all your friends, family or associates Shows current status, day of week, local time, timezone, next alarm event, next public holiday, current temperature and weather description Customise this list, and add any location around the world, either from included 40,000+ in-app database, or via full internet map search - Location Details screen Tap on ellipsis to get full location detail summary, set or edit alarms, list of all holidays and observances for this year and next, and see a detailed 24hr weather history - Timezone comparisons See a full-screen graphic with local hours of the day laid side-by side for all your locations, with a red line showing the time right now Select any date to see how comparison hours shift when daylight savings starts or ends
Screenshots
Verdict
The clearest difference is price: World Clock at Free against ZoneTrekker's $3.99. World Clock also leads on rating (3.9 vs 3.4) and review sentiment (77% vs 63%). ZoneTrekker's advantage is ads (none vs shown). On ratings volume, in-app purchases, 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
World Clock is free to download; ZoneTrekker costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
World Clock holds the better App Store score, 3.9 against 3.4. Both are backed by a comparable volume of ratings — 14 and 5 respectively. Written reviews point the same way: 77% of World Clock's written reviews are positive against 63% of ZoneTrekker's.
World Clock ships an update every 6 weeks, ZoneTrekker every 3 months. The most recent releases landed on November 6, 2026 and November 9, 2026 respectively.
| Parameter | World Clock | ZoneTrekker |
|---|---|---|
| Price | Free — better | $3.99 |
| Rating | 3.9 (14 ratings) — better | 3.4 (5 ratings) |
| Positive reviews | 77.4% of reviews — better | 62.5% of reviews |
| Number of ratings | 14 — better | 5 |
| Update frequency | Every 6 weeks — better | Every 3 months |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported — better | Paid |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 6 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Yuki Fukui | ozPDA |
Customer experience
World Clock
ZoneTrekker
In-app purchases
World Clock
No in-app purchases
ZoneTrekker
No in-app purchases
Questions
Is World Clock free?
Is ZoneTrekker free?
Which has better reviews, World Clock or ZoneTrekker?
Do World Clock or ZoneTrekker have ads?
Which is updated more often, World Clock or ZoneTrekker?
Other comparisons















