Comparison

Custom Alerts vs World Clock

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

Head to head
About

Custom Alerts

This app allows users to set highly customizable alerts for calendar events, ranging from minutes to weeks in advance. It supports multiple calendars and enables event creation and editing directly within the application, syncing seamlessly with the native iOS calendar.

Highlights
  • Set alerts from 0 minutes to 99 weeks ahead
  • Supports multiple calendars
  • Create and edit calendar events
  • Syncs with iOS calendar
  • Customizable alert timing
Features
Read full description

Set alerts on calendar events as close as 0 minutes ahead of the event or as long as 99 weeks ahead of the event •Supports multiple calendars •Create and edit calendar events from within Custom Alerts •Everything automatically syncs with the built-in iOS calendar app.

About

World Clock

Easily convert time across different timezones with a simple interface. Schedule meetings, plan travel, or connect with people globally. Features a world clock and meeting planner, with offline functionality.

Highlights
  • Intuitive timezone conversion
  • Built-in world clock
  • Meeting planner and sharing
  • Offline functionality
  • Automatic daylight saving support
  • Customizable location labels
  • Cross-device cloud synchronization
Features
Read full description

Respect everyone’s time, wherever they work. Easy Timezones is the visual world clock and time planner for people coordinating global teams and international clients. See everyone’s working day, find a time that works, and share every local time—without timezone math. Easy Timezones is ad-free for everyone. See your global team’s day Compare local times and dates on one smooth timeline. Typical awake-hour and work-hour bands help you recognize when it may be reasonable to call, message, or meet. Find a time that works Swipe through the day instead of calculating offsets. Tap to create a meeting window, then adjust it in 15-minute steps while every location updates. Share every local time Add the selected time to your device calendar, prepare an email, or share a clear local-time summary through messaging and other apps. Keep important times close Use Home Screen widgets to see important locations without opening the app. On supported iPhones, add a compact Lock Screen widget for an even faster glance. Built for global coordination - Add practical labels such as London HQ or New York Sales - Organize teams, clients, projects, or trips with Premium groups - Plan future dates with automatic daylight saving time handling - Search more than 59,000 cities, plus UTC and GMT - Use core time, search, and planning features offline - Choose 12-hour or 24-hour time and light or dark mode Easy Timezones Premium Coordinate more teams and clients with unlimited locations, multiple groups, cross-device cloud sync, and group-aware widgets. See the whole day. Find the right time. Share it. Terms of Use (EULA): https://easytimezones.com/terms Privacy Policy: https://easytimezones.com/privacy

Screenshots

Custom Alerts4 screens
World Clock4 screens

Verdict

The call

The clearest difference is price: World Clock at Free against Custom Alerts's $0.99. World Clock also leads on rating (4.5 vs 3.8) and update cadence (every 6 weeks vs every 13 months). Custom Alerts's advantage is in-app purchases (none vs 5) and iOS requirement (12.0 vs 15.0). On ratings volume, 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

World Clock is free to download; Custom Alerts costs $0.99 up front. World Clock sells 5 in-app purchases, starting at $1.99 per month. Custom Alerts asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

World Clock holds the better App Store score, 4.5 against 3.8. Both are backed by a comparable volume of ratings — 4 and 11 respectively. Written reviews point the same way: 50% of Custom Alerts's written reviews are positive against 67% of World Clock's.

UpkeepUpdate frequency

Custom Alerts ships an update every 13 months, World Clock every 6 weeks. The most recent releases landed on November 1, 2026 and November 7, 2026 respectively.

Scorecard7 real differences · 3 level
Custom Alerts versus World Clock: the parameters behind the verdict, then further details
ParameterCustom AlertsWorld Clock
Price$0.99Free — better
Rating3.8 (4 ratings)4.5 (11 ratings) — better
Positive reviews50.0% of reviews66.7% of reviews — better
Number of ratings411 — better
Update frequencyEvery 13 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size1 MB60 MB
Age rating4+4+
DeveloperCalm Seas Software, LLCSamtark Pty Ltd

Customer experience

Custom Alerts

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews4 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

World Clock

All ratings11 ratings
Positive81.8%
Neutral9.1%
Negative9.1%
Written reviews6 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

None

Custom Alerts

No in-app purchases

5 purchases

World Clock

Subscriptions4
  • Standard$1.991 Month
  • Premium$2.991 Month
  • Premium Monthly7 Days trial$2.991 Month
Show 1 more
  • Premium Annual7 Days trial$14.991 Year
One-time1
  • Premium Lifetime$34.99

Questions

Is Custom Alerts free?
Custom Alerts costs $0.99, with no in-app purchases.
Is World Clock free?
World Clock is free to download, with in-app purchases available.
Which has better reviews, Custom Alerts or World Clock?
World Clock is rated higher. Custom Alerts averages 3.8 out of 5 from 4 ratings, while World Clock averages 4.5 from 11 ratings.
Do Custom Alerts or World Clock have ads?
Neither Custom Alerts nor World Clock shows ads.
Which is updated more often, Custom Alerts or World Clock?
Custom Alerts ships an update every 13 months, and World Clock every 6 weeks. Most recently, Custom Alerts was updated on November 1, 2026 and World Clock on November 7, 2026.

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