Comparison

World Time Clock Master vs Time Calculator Tools

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

Head to head
About

World Time Clock Master

Effortlessly manage multiple time zones with this app. Convert times instantly, schedule events, and view global clocks at a glance with interactive widgets. Features atomic accuracy and a vast database of locations.

Highlights
  • Multiple time zone display
  • Interactive time conversion
  • Event scheduling
  • Atomic time accuracy
  • Dynamic home screen widgets
  • List mode for text view
  • Real moon phases and sunrise/sunset
Features
Read full description

THE EASIEST WAY TO DEAL WITH MULTIPLE TIMEZONES + INTERACTIVE WIDGETS Sick of screwing up meeting times and missing calls? This app cuts through time-zone confusion and hands you the perfect hour at a glance. Forget guesswork — just click, connect, and impress. KEY FEATURES EVENT SCHEDULING MADE EASY Found the perfect meeting time? Add events to your calendar with just a tap, and never miss an international webinar, call, or special moment again. ATOMIC ACCURACY No drift, no guesswork. Each second syncs with the atomic standard, so you can trust every moment. Extensive Time Zone Database: Tap into over 160,000 locations and time zones including GMT, UTC, and more. UNIFIED CLOCK FACE View all your essential time zones at a glance on one beautifully designed, customizable clock face. Whether you prefer digital or analog displays (or even military time), everything is exactly where you need it. INTERACTIVE TIME CONVERSION Convert times instantly by simply twisting or swiping across the clock face. Watch as your selected time zones update in real time—making planning international calls, meetings, or travel effortless. DYNAMIC WIDGETS Access global times without even opening the app. Our interactive home screen widget lets you drag a simple line to reveal and convert times, ensuring you’re always in sync no matter where you are. LIST MODE Get a clean, text-based view of all your cities in one column. See times and dates at a glance, and scroll to check future or past hours. It’s a no-fuss way to track the world’s clocks. FEELS LIKE A LUXURY TIMEPIECE We poured effort into details most people never notice — and we’re okay with that. Our users aren’t “most people.” Details include: — Real Moon Phases — Real Moon Rotation — Real Sunrise & Sunset — Advanced City Lights — Haptic Feedback * * * World Clock Master offers a premium subscription: Subscribe to get access to unlimited timezones, interactive widgets, customizations, 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

About

Time Calculator Tools

This app offers a suite of tools for date and time calculations. It can determine the duration between dates, calculate time differences across zones, and estimate time until specific events. It also helps find the midpoint between two dates.

Highlights
  • Calculate total hours and minutes worked
  • Check time in different time zones
  • Calculate days until a specific event
  • Determine weeks between two dates
  • Find the midpoint of a date range
Features
Read full description

Collection of tools to calculate dates and times: Time Calculator (ex: How many total hours and minutes did I work this week?) Time Zones (ex: What time is it in other time zones? When will it be 8 PM in another time zone?) Time Until (ex: How many days until my project is due?) Time Between (ex: How many weeks are there between our birthdays?) Average date (ex: What's the midpoint of summer?)

Screenshots

World Time Clock Master4 screens
Time Calculator Tools4 screens

Verdict

The call

The clearest difference is in-app purchases: Time Calculator Tools at none against World Time Clock Master's 13. Time Calculator Tools also leads on review sentiment (100% vs 66%) and rating (5.0 vs 4.6). World Time Clock Master's advantage is ads (none vs shown) and update cadence (fortnightly vs every 5 months). On price 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 Time Clock Master sells 10 in-app purchases, starting at $2.99 per month. Time Calculator Tools asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Time Calculator Tools holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: World Time Clock Master has 816 ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 66% of World Time Clock Master's written reviews are positive against 100% of Time Calculator Tools's.

UpkeepUpdate frequency

World Time Clock Master ships an update fortnightly, Time Calculator Tools every 5 months. The most recent releases landed on September 29, 2026 and June 3, 2026 respectively.

Scorecard8 real differences · 2 level
World Time Clock Master versus Time Calculator Tools: the parameters behind the verdict, then further details
ParameterWorld Time Clock MasterTime Calculator Tools
PriceFreeFree
Rating4.6 (816 ratings)5.0 (7 ratings) — better
Positive reviews65.8% of reviews100.0% of reviews — better
Number of ratings816 — better7
Update frequencyFortnightly — betterEvery 5 months
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationSubscriptionAd-supported — better
DevicesiPhone, iPad, Vision ProiPhone, iPad, iPod
Requires iOS17.015.6 — better
Further details — not scored
Size236 MB34 MB
Age rating4+4+
DeveloperAlex Komarov Inc.Evan Winograd

Customer experience

World Time Clock Master

All ratings816 ratings
Positive90.8%
Neutral2.8%
Negative6.4%
Written reviews76 reviews
Positive65.8%
Neutral5.3%
Negative28.9%

Time Calculator Tools

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

World Time Clock Master

Reported bugs

4 issues
  • Lose all the registered locations after updating the app
  • Sticky signup interface
  • Widget doesn't work
  • GMT and London currently have a 1 hour time difference between the two locations, but the app shows them the same time

Requested features

4 requests
  • Add the time difference in hours between the default location and other locations in both the widget and the app
  • See my calendar events on the dial
  • Make a paid tier that doesn't collect my data
  • Add new event to a Calendar

Time Calculator Tools

Not enough reviews yet to summarise bugs or requests.

In-app purchases

10 purchases

World Time Clock Master

Subscriptions6
  • 1 month3 variants$2.991 Month
  • 3 months$3.993 Months
  • 1 year1 Year trial2 variants$11.991 Year
Show 3 more
  • 1 year3 Days trial$11.991 Year
  • 1 year$11.991 Year
  • 1 year3 Days trial$19.991 Year
One-time4
  • Lifetime$29.99
  • Lifetime$49.99
  • Lifetime$79.99
Show 1 more
  • Lifetime$99.99
None

Time Calculator Tools

No in-app purchases

Questions

Is World Time Clock Master free?
World Time Clock Master is free to download, with in-app purchases available.
Is Time Calculator Tools free?
Time Calculator Tools is free to download, with no in-app purchases.
Which has better reviews, World Time Clock Master or Time Calculator Tools?
Time Calculator Tools is rated higher. World Time Clock Master averages 4.6 out of 5 from 816 ratings, while Time Calculator Tools averages 5.0 from 7 ratings.
Do World Time Clock Master or Time Calculator Tools have ads?
Time Calculator Tools shows ads; World Time Clock Master does not.
Which is updated more often, World Time Clock Master or Time Calculator Tools?
World Time Clock Master ships an update fortnightly, and Time Calculator Tools every 5 months. Most recently, World Time Clock Master was updated on September 29, 2026 and Time Calculator Tools on June 3, 2026.

Other comparisons