Comparison

World Clock vs Overlap

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

World Clock

Easily compare world times and convert dates and times across different cities and time zones. Ideal for international meetings, travel, or staying connected with loved ones abroad. Offers widgets for quick access and customizable themes.

Highlights
  • Compare multiple cities and time zones
  • Convert dates and times across regions
  • Check UTC and standard time zones
  • Add widgets for fast world time checks
  • See day and night indicators
  • Choose 12-hour or 24-hour format
  • Select from multiple theme colors
Features
Read full description

Need to know the right time in another city before you call, travel, or schedule a meeting? World Clock-Timezone Converter helps you compare world times and convert any date and time across cities, UTC, and standard time zones. Add the places you care about, check the current time at a glance, or choose a future date to see what that time becomes around the world. It is useful for international meetings, remote teams, family abroad, travel plans, and friends in different time zones. Use widgets for quick access, switch between 12-hour and 24-hour time, check UTC and standard time zones, and choose a theme that fits your phone. Features: - Compare multiple cities and time zones in one list - Convert dates and times across regions - Check UTC, GMT, Zulu time, and standard time zones - Add widgets for fast world time checks - Search many cities and time zone entries - See day and night indicators - Use 12-hour or 24-hour time format - Choose from multiple theme colors - Free to use If you have feedback or need a location added, contact us at appsupport@bokeriastudio.com.

About

Overlap

Easily find optimal meeting times across different time zones with a visual graph. Set custom availability for each location and sync with your calendar to avoid scheduling conflicts. Share convenient times directly from the app.

Highlights
  • Visual Overlap Graph for meeting times
  • Customizable availability hours per time zone
  • Calendar event integration
  • Multiple time zone display
  • Time zone renaming
  • Lock Screen Standby Mode widget
Features
Read full description

Find the perfect time to catchup across multiple time zones without the mind-bending math. Overlap is a smart world clock that helps you connect with people in different time zones. It makes it simple to see the time in multiple places at once, and its fun Overlap Graph is a unique visual way to quickly find convenient meeting times across the world. You can choose ‘available’ hours for each time zone. For example Dan in London might be available from 2pm to 5pm and Rashida in Sydney might be available from 7am to midday. Bring up the Overlap Graph and it will magically show you the most compatible times to schedule your catchup. Overlap also displays your calendar events, so you can always find a time that suits your schedule. Available on iPhone, iPad and Mac. • You can see multiple time zones in one beautiful UI • You can swipe left and right to quickly move through time. • You can customize 'availability' for each timezone - this could mean office hours for a meeting or simply when you're available for a group chat with your far-flung family -no more 'Sorry that's 3am for me!' • You can rename each time zone; for example, you might simply rename a time zone to say 'Grandma' or the name of a client you work with. Or perhaps your Grandma is your client, no judgement here. • You can hide time zones that you don’t need right now so it’s always easy to focus on what you need to know. • You can show your calendar events so you can always choose a time that fits your schedule. • Once you’ve chosen a great time its easy to share it via your favorite messaging app or create a calendar event. • Standby Mode is a Lock Screen feature that activates automatically when your iPhone is charging in landscape mode. The Overlap widget fully supports this mode!

Screenshots

World Clock4 screens
Overlap4 screens

Verdict

The call

The clearest difference is ads: Overlap at none against World Clock's shown. Overlap also leads on monetization model (free vs ad-supported). World Clock's advantage is review sentiment (87% vs 67%) and update cadence (monthly vs every 3 months). On price, rating, ratings volume 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

On the App Store both sit at effectively the same score — 4.8 for World Clock against 4.8 for Overlap. Both are backed by a comparable volume of ratings — 600 and 875 respectively. Written reviews are what separate them: 87% of World Clock's written reviews are positive against 67% of Overlap's.

UpkeepUpdate frequency

World Clock ships an update monthly, Overlap every 3 months. Both last shipped on October 29, 2026.

Scorecard4 real differences · 6 level
World Clock versus Overlap: the parameters behind the verdict, then further details
ParameterWorld ClockOverlap
PriceFreeFree
Rating4.8 (600 ratings)4.8 (875 ratings) — better
Positive reviews86.7% of reviews — better67.3% of reviews
Number of ratings600875 — better
Update frequencyMonthly — betterEvery 3 months
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supportedFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS15.015.0
Further details — not scored
Size34 MB71 MB
Age rating4+4+
DeveloperBokeriaBonobo

Customer experience

World Clock

All ratings600 ratings
Positive94.5%
Neutral2.5%
Negative3.0%
Written reviews45 reviews
Positive86.7%
Neutral2.2%
Negative11.1%

Overlap

All ratings849 ratings
Positive95.5%
Neutral2.4%
Negative2.1%
Written reviews248 reviews
Positive67.3%
Neutral11.3%
Negative21.4%

User reviews

World Clock

From 600 App Store ratings

What we love

  • 👍 Simple and intuitive user interface
  • 🆓 Free application with no paywall
  • 🌍 Comprehensive timezone and city database
  • ⚡ Fast app performance and quick load times
  • 🔄 Automatic daylight saving time updates

Room to improve

  • 🐛 Widget displays incorrect or blank times
  • 🐛 Time display stuck or frozen
  • ⚠️ Daylight saving time handling issues
  • 🐛 Night mode compatibility problems
  • 🐛 Screen flickering when scrolling

Overlap

From 875 App Store ratings

What we love

  • 💡 Elegant and intuitive interface
  • 🚀 Helpful for coordinating meetings across time zones
  • 👍 Useful for tracking time differences globally
  • 👍 Simple and easy to use
  • 👍 Beautiful and sleek design

Room to improve

  • 🐛 Widget not working
  • 🐛 Timezone data not always accurate
  • 🐛 Duplicate timezone entries
  • 🐛 App crashes and freezes
  • 🔋 High CPU usage on Mac

Bugs and requests

World Clock

Reported bugs

9 issues
  • Widget showing blank screen instead of times
  • Widget time display stuck or frozen
  • Incorrect time display after daylight saving changes
  • Widget not working on night mode
  • Screen flickering when scrolling
Show 4 more
  • Widget configuration not saving properly
  • Date/time truncation in location field
  • Widget disappeared after recent update
  • Widget not displaying multiple cities

Requested features

12 requests
  • Alarm functionality for multiple timezones
  • Larger widget size options (2x2, 3x3)
  • Widget theme/color customization
  • Seconds display in time
  • Real-time minute updates
Show 7 more
  • Reorderable timezone list
  • Reverse time conversion capability
  • MacBook/desktop version
  • Ad-free premium version
  • Better widget transparency controls
  • Improved widget design and modernization
  • Day of week display in custom widgets

Overlap

Reported bugs

4 issues
  • Timezone data not updating correctly
  • Inability to delete unwanted timezones
  • Inconsistent behavior across platforms
  • Typing issues on Mac version

Requested features

5 requests
  • Add option to reorder timezones
  • Implement 24-hour clock display
  • Allow customization of colors and backgrounds
  • Integrate with calendar for scheduling
  • Add weather information for each timezone

In-app purchases

None

World Clock

No in-app purchases

None

Overlap

No in-app purchases

Questions

Is World Clock free?
World Clock is free to download, with no in-app purchases.
Is Overlap free?
Overlap is free to download, with no in-app purchases.
Which has better reviews, World Clock or Overlap?
Overlap is rated higher. World Clock averages 4.8 out of 5 from 600 ratings, while Overlap averages 4.8 from 875 ratings.
Do World Clock or Overlap have ads?
World Clock shows ads; Overlap does not.
Which is updated more often, World Clock or Overlap?
World Clock ships an update monthly, and Overlap every 3 months. Most recently, World Clock was updated on October 29, 2026 and Overlap on October 29, 2026.

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