Comparison

Flip Clock vs World Time Clock Master

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

Head to head
About

Flip Clock

This app provides a classic digital clock widget for your device's home, lock, and standby screens. It offers features like displaying seconds, a calendar, customizable themes, and various timekeeping tools including alarms, timers, and stopwatches. It can also function as a screensaver when charging.

Highlights
  • Display seconds on multiple screens
  • Full screen time and date
  • Smart alarm clock
  • Timer and stopwatch
  • Countdown to target dates
  • Pomodoro Technique timer
  • Customizable widget signatures
Features
Read full description

Transform your iPhone and iPad into a stylish, functional retro flip clock. Whether you need a sleek desk clock for your workspace, a soothing nightstand clock, or a personalized focus timer, Flip Clock brings classic minimalism and personal flair to your everyday workflow. Perfect for StandBy mode, Lock Screen widgets, and full-screen focus sessions. ◆ Aesthetic Clock and StandBy Mode - Full-Screen Flip Clock: Vintage flip animation with customizable themes. - OLED Burn-In Protection: Built-in pixel shifting technology protects your screen during long always-on sessions. - Show Seconds Everywhere: Real-time seconds display on Home Screen, Lock Screen, Dynamic Island, and StandBy mode. - Smart Auto-Launch: Automatically turns into a screensaver when charging. - 12/24 Hour Formats: Toggle easily with flexible date and calendar displays. ◆ Custom Signatures and Aesthetic Widgets - Personal Signatures Anywhere: Add custom text, mottoes, or signatures directly in the app and on your Lock Screen and Home Screen widgets. - Aesthetic Widgets: Beautiful, customizable widgets featuring clock, calendar, and your personal text. - Multiple Clock Themes: Personalize colors, fonts, and styles for any desk setup. ◆ Focus, Timers and Productivity Tools - Count-up and Countdown Timers: Flexible stopwatch count-up timers and precise countdown timers for workouts, study sessions, and daily tasks. - Pomodoro Technique: Stay in the flow zone with integrated study and work interval timers. - Floating Stopwatch: Keep a live floating timer widget over other apps. - Event Countdown: Track big upcoming moments like New Year's, exams, birthdays, and holidays. - White Noise Player: Soothing background sounds to boost concentration or help you sleep. ◆ Smart Alarms and Online Music Ringtones - Rich Online Music Library: Choose from a wide selection of online music tracks, ambient sounds, and ringtones to wake up your way. - Smart Volume Control: Alarms that gently wake you up by automatically adjusting volume gradually. - Hourly Chime: Friendly voice/sound timekeeping on the hour. Upgrade your desk setup and daily routine today with Flip Clock!

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

Screenshots

Flip Clock4 screens
World Time Clock Master4 screens

Verdict

The call

The clearest difference is monetization model: Flip Clock at free with in-app purchases against World Time Clock Master's subscription. Flip Clock also leads on ratings volume (69K vs 816) and iOS requirement (15.0 vs 17.0). World Time Clock Master's advantage is ads (none vs shown). On price, rating, review sentiment and update cadence 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. Flip Clock sells 3 one-off in-app purchases and World Time Clock Master sells 10 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.6 for Flip Clock against 4.6 for World Time Clock Master. That said, the two scores are not equally well evidenced: Flip Clock has 69K ratings behind it against 816, so its average is the more settled of the two. Written reviews are what separate them: 73% of Flip Clock's written reviews are positive against 66% of World Time Clock Master's.

UpkeepUpdate frequency

Flip Clock ships an update every 3 weeks, World Time Clock Master fortnightly. The most recent releases landed on September 24, 2026 and September 20, 2026 respectively.

Scorecard4 real differences · 6 level
Flip Clock versus World Time Clock Master: the parameters behind the verdict, then further details
ParameterFlip ClockWorld Time Clock Master
PriceFreeFree
Rating4.6 (69K ratings)4.6 (816 ratings)
Positive reviews72.5% of reviews — better65.8% of reviews
Number of ratings69K — better816
Update frequencyEvery 3 weeksFortnightly — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchases — betterSubscription
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, Vision Pro
Requires iOS15.0 — better17.0
Further details — not scored
Size77 MB236 MB
Age rating4+4+
Developer翠玲 施Alex Komarov Inc.

Customer experience

Flip Clock

All ratings69,436 ratings
Positive90.7%
Neutral3.8%
Negative5.5%
Written reviews2,135 reviews
Positive72.5%
Neutral8.2%
Negative19.3%

World Time Clock Master

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

User reviews

Flip Clock

From 69K App Store ratings

What we love

  • 👍 Simple and effective
  • 🎨 Aesthetic design
  • ⏱️ Useful timer and alarm features
  • 🔍 Highly visible and readable clock
  • 🤩 Great for productivity and focus

Room to improve

  • 🔍 Limited customization options
  • 🔋 Battery drain issues
  • 📢 Excessive ads
  • 🔒 Unreliable unlock/restore purchases
  • 🐛 Bugs and glitches

World Time Clock Master

From 816 App Store ratings

What we love

  • 🚀 Delightful scheduling assistance
  • 👍 Feature improvement
  • 👍 The best Timezone helper
  • 👍 One of the best clocks around
  • 👍 The Widget is so damn cool!

Room to improve

  • 🐛 Problemas al actualizar
  • 🐛 Sticky signup interface
  • 🐛 Demo not enough
  • 🔒 NOT A FREE APP
  • 💰 Terrible monetisation model compared to previous app

Bugs and requests

Flip Clock

Reported bugs

4 issues
  • Clock freezing or not updating correctly
  • Alarm issues (not triggering, unable to disable)
  • Inconsistent behavior across devices and OS versions
  • Unlock/restore purchase bugs

Requested features

5 requests
  • More clock face and color options
  • Automatic dark/light mode switching
  • Ability to set clock as device wallpaper
  • Improved alarm functionality and customization
  • Seamless integration with other devices

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

In-app purchases

3 purchases

Flip Clock

One-time3
  • Remove Ads$0.99
  • More clock skins$0.99
  • Premium Version$2.99
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

Questions

Is Flip Clock free?
Flip Clock is free to download, with in-app purchases available.
Is World Time Clock Master free?
World Time Clock Master is free to download, with in-app purchases available.
Which has better reviews, Flip Clock or World Time Clock Master?
Flip Clock and World Time Clock Master are both rated 4.6 out of 5 on the App Store, from 69K and 816 ratings respectively.
Do Flip Clock or World Time Clock Master have ads?
Flip Clock shows ads; World Time Clock Master does not.
Which is updated more often, Flip Clock or World Time Clock Master?
Flip Clock ships an update every 3 weeks, and World Time Clock Master fortnightly. Most recently, Flip Clock was updated on September 24, 2026 and World Time Clock Master on September 20, 2026.

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