Comparison

World Time Calc vs CheckTimeYo

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

Head to head
About

World Time Calc

Visualize day/night cycles and working hours across different cities with an interactive timeline. Receive custom notifications for sunrise and sunset. Manually adjust work hours for precise scheduling.

Highlights
  • Day/night and working hour graphs
  • Automatic time updates
  • Manual work hour adjustment
  • Interactive time cursor
  • Sunrise/sunset alarm notifications
Features
Read full description

・Features of the WorldTimeCalc ・Graph of day/night and working hours in each city. - Day and night time will be updated automatically every day. Working hours can be changed manually for each city. ・By sliding the cursor, the time for each city will change in the list. ・In normal times, the cursor points to the current time in real time, so you can see at a glance whether it is daytime, nighttime, during business hours, or outside in each city. ・You can send alarm notifications for sunrise, sunset, start time, and end time.

About

CheckTimeYo

Features
Read full description

'CheckTimeYo' is a retro-looking clock app that displays the time, the time from cities around the world (489 of them) of your choice, a feed of your choice, a calendar, and today's moon phase. With 390 themes to choose from, you can even select a font to your liking. Download now! It's free, with no ads, no in-app purchases, and no catch! Using this app is easy. For many settings, there's no need to open the Settings screen. Just tap on the area of the screen where you want to make changes. For example, if you want to change the date format to your liking, simply tap on the date displayed on the screen.

Screenshots

World Time Calc3 screens
CheckTimeYo4 screens

Verdict

The call

The clearest difference is in-app purchases: CheckTimeYo at none against World Time Calc's 1. CheckTimeYo also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement 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 Calc sells 1 one-off in-app purchase. CheckTimeYo asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 6 weeks. The most recent releases landed on July 9, 2026 and December 2, 2025 respectively.

Scorecard2 real differences · 6 level
World Time Calc versus CheckTimeYo: the parameters behind the verdict, then further details
ParameterWorld Time CalcCheckTimeYo
PriceFreeFree
Positive reviews66.7% of reviews—
Update frequencyEvery 6 weeksEvery 6 weeks
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationAd-supported—
DevicesiPhone, iPad — betteriPhone
Requires iOS16.0 — better17.4
Further details — not scored
Size10 MB12 MB
Age rating4+4+
DeveloperHajime SuzukiMasayoshi Ueda

In-app purchases

1 purchases

World Time Calc

One-time1
  • PremiumPlan$7.99
None

CheckTimeYo

No in-app purchases

Questions

Is World Time Calc free?
World Time Calc is free to download, with in-app purchases available.
Is CheckTimeYo free?
CheckTimeYo is free to download, with no in-app purchases.
Do World Time Calc or CheckTimeYo have ads?
World Time Calc shows ads; CheckTimeYo does not.
Which is updated more often, World Time Calc or CheckTimeYo?
World Time Calc ships an update every 6 weeks, and CheckTimeYo every 6 weeks. Most recently, World Time Calc was updated on July 9, 2026 and CheckTimeYo on December 2, 2025.

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