Comparison

Overlap vs Lava Clock

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

Head to head
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!

About

Lava Clock

Features
Read full description

Lava Clock - A Captivating Visual Experience for Timekeeping Lava Clock is not just a clock. It's a complete visual experience that transforms time display into a unique aesthetic moment. With dynamic backgrounds, elegant fonts, and fluid animations, your screen becomes a functional work of art. Key Features Stunning Backgrounds Choose from a variety of colorful gradients and background images. The Pro version even allows you to create your own custom gradients and use your favorite photos as backgrounds. Fluid Animations Bring your clock to life with smooth, soothing animations. Adjust the speed and intensity to your preference, or select different effects: waves, pulses, shimmers, spirals, or particles. Integrated Weather Instantly check local weather conditions. Lava Clock displays the current temperature and conditions for your location, with the ability to search for any city in the world. Custom Fonts Personalize the appearance of the time with a wide range of fonts. The Pro version includes exclusive handwritten and artistic fonts for a truly unique style. Smart Themes Let your clock's appearance adapt automatically to the time of day or season, with backgrounds that naturally evolve from morning to evening. Various Display Modes Choose from five different layouts: classic, minimal, digital, analog, or compact, depending on your preferences and needs. Lava Clock Pro Unlock the full creative potential with Lava Clock Pro: Custom backgrounds and use of your own photos Advanced animations with speed and intensity controls Exclusive handwritten and artistic fonts Advanced dynamic themes (day, night, seasonal) Lava Clock is the perfect clock for those who appreciate aesthetics and customization. Transform your device into an elegant time display that reflects your personal style. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Weather Data provided by Apple Weather : https://weatherkit.apple.com/legal-attribution.html

Screenshots

Overlap4 screens
Lava Clock4 screens

Verdict

The call

The clearest difference is price: Overlap at Free against Lava Clock's $0.99. Overlap also leads on in-app purchases (none vs 1) and device support (4 vs 2). Lava Clock's advantage is update cadence (every 2 days vs every 3 months). On ads 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

Overlap is free to download; Lava Clock costs $0.99 up front. Lava Clock sells 1 one-off in-app purchase. Overlap asks for nothing beyond the download.

UpkeepUpdate frequency

Overlap ships an update every 3 months, Lava Clock every 2 days. The most recent releases landed on October 16, 2026 and September 26, 2026 respectively.

Scorecard5 real differences · 5 level
Overlap versus Lava Clock: the parameters behind the verdict, then further details
ParameterOverlapLava Clock
PriceFree — better$0.99
Rating4.8 (849 ratings) — better—
Positive reviews67.3% of reviews—
Number of ratings849 — better—
Update frequencyEvery 3 monthsEvery 2 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad
Requires iOS15.0 — better17.0
Further details — not scored
Size71 MB42 MB
Age rating4+4+
DeveloperBonoboMaxime Pontoire

Bugs and requests

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

Lava Clock

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Overlap

No in-app purchases

1 purchases

Lava Clock

One-time1
  • Unlock Features$3.99

Questions

Is Overlap free?
Overlap is free to download, with no in-app purchases.
Is Lava Clock free?
Lava Clock costs $0.99, and also offers in-app purchases.
Do Overlap or Lava Clock have ads?
Neither Overlap nor Lava Clock shows ads.
Which is updated more often, Overlap or Lava Clock?
Overlap ships an update every 3 months, and Lava Clock every 2 days. Most recently, Overlap was updated on October 16, 2026 and Lava Clock on September 26, 2026.

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