Comparison

World Clock Pro vs 배터리 D

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

Head to head
About

World Clock Pro

Easily track and convert time across multiple global time zones. Schedule events, share accurate times instantly, and access a vast database of cities and time zones. Ideal for international communication and planning.

Highlights
  • Universal clock access
  • Effortless time conversion
  • Schedule calendar events
  • Instant time sharing
  • Large city and timezone database
  • Automatic timezone updates
Features
Read full description

TIMEZONE CALCULATOR – YOUR ULTIMATE WORLD TIME COMPANION Master global time with a tool that is clear, concise, and built for busy international lives. Whether you’re scheduling business meetings or connecting with friends overseas, World Clock Pro keeps you in sync—simply and directly. ESSENTIAL FEATURES UNIVERSAL CLOCK ACCESS: View accurate times in cities around the world—New York, London, Tokyo, Sydney. No fuss, just the facts. EFFORTLESS TIME CONVERSION: Swipe to convert and compare time zones with precision. Plan your calls and meetings with ease. SCHEDULE WITH CONFIDENCE: Create and integrate calendar events quickly. Organize trips, group activities, and international calls without confusion. INSTANT TIME SHARING: Share exact times via email, SMS, social media, or messengers. Coordination is just a click away. HUGE CITY & TIMEZONE DATABASE: Access over 160,000 cities and popular time zones like GMT, UTC, EST, and PST at your fingertips. WHY THIS APP MATTERS Say goodbye to timezone confusion. This isn’t just another world clock—it’s a powerful tool for global thinkers, frequent travelers, and anyone who values clear, reliable time data. Streamline your schedule and manage your day without delay. EXTEND YOUR EXPERIENCE For a deeper dive into global time management, World Clock Pro is also available on Mac. Just search “World Clock Pro” in the Mac AppStore * * * World Clock Pro offers a premium subscription: Subscribe to get access to unlimited timezones, and timely automatic updates of our timezone database of more than 160,000 locations and timezones. – Length of subscription: 1 month or 1 year – Payment will be charged to iTunes Account at confirmation of purchase – Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period – Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal – Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase – Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable – Terms & Conditions: https://timemaster.s3.amazonaws.com/Time-master-terms.pdf – Privacy Policy: https://timemaster.s3.amazonaws.com/Time-master-privacy-policy.pdf

About

배터리 D

Features
Read full description

이 앱은 아이폰 배터리를 언제 교체하면 좋을지 D-Day로 알려주는 앱 입니다. 아이폰 구입한 시기를 지정하고, 교체 목표치(%)를 입력해야 합니다. 현재 내 배터리의 성능 최대치(설정>배터리>배터리 성능상태 및 충전 %)를 두 번 이상 입력하면 내 아이폰 배터리 교체 D-Day를 계산해 줍니다.

Screenshots

World Clock Pro4 screens
배터리 D1 screens

Verdict

The call

The clearest difference is in-app purchases: 배터리 D at none against World Clock Pro's 6. 배터리 D also leads on update cadence (every 2 weeks vs every 2 months). World Clock Pro's advantage is iOS requirement (13.0 vs 26.2). On price, ads and device support 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. World Clock Pro sells 5 in-app purchases, starting at $1.99 per month. 배터리 D asks for nothing beyond the download.

UpkeepUpdate frequency

World Clock Pro ships an update every 2 months, 배터리 D every 2 weeks. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
World Clock Pro versus 배터리 D: the parameters behind the verdict, then further details
ParameterWorld Clock Pro배터리 D
PriceFreeFree
Rating4.8 (1.4K ratings) — better—
Positive reviews76.7% of reviews—
Number of ratings1.4K — better—
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscription—
DevicesiPhone, iPod — betteriPhone
Requires iOS13.0 — better26.2
Further details — not scored
Size41 MB1 MB
Age rating4+4+
DeveloperAlex Komarov Inc.Young Joon Kim

Bugs and requests

World Clock Pro

Reported bugs

3 issues
  • Widget not working on iOS 14 and newer
  • Issues with local time zone detection and display
  • Inconsistent behavior after app updates

Requested features

4 requests
  • Add date function for future time zone changes
  • Ability to customize and sort displayed time zones
  • Implement an Apple Watch app
  • Improve widget functionality and customization

배터리 D

Not enough reviews yet to summarise bugs or requests.

In-app purchases

5 purchases

World Clock Pro

Subscriptions5
  • 1 month$1.991 Month
  • 1 month2 variants$2.991 Month
  • 1 year3 Days trial$9.991 Year
Show 2 more
  • 1 year3 Days trial$11.991 Year
  • 1 year3 Days trial$19.991 Year
None

배터리 D

No in-app purchases

Questions

Is World Clock Pro free?
World Clock Pro is free to download, with in-app purchases available.
Is 배터리 D free?
배터리 D is free to download, with no in-app purchases.
Do World Clock Pro or 배터리 D have ads?
Neither World Clock Pro nor 배터리 D shows ads.
Which is updated more often, World Clock Pro or 배터리 D?
World Clock Pro ships an update every 2 months, and 배터리 D every 2 weeks. Most recently, World Clock Pro was updated on November 6, 2026 and 배터리 D on October 31, 2026.

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