Comparison

World Clock vs ShiftRest

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

Head to head
About

World Clock

Easily convert time zones and check the current time in any region worldwide. This tool helps you stay connected with friends abroad, manage international meetings, and plan travel by accurately displaying dates and times across different locations.

Highlights
  • Convert time zones freely
  • Search time in any area
  • Check time for friends abroad
  • Manage international conferences
  • Set up widgets
  • Set theme color
  • Set UTC and standard times
Features
Read full description

Need to know the right time in another city before you call, travel, or schedule a meeting? World Clock-Timezone Converter helps you compare world times and convert any date and time across cities, UTC, and standard time zones. Add the places you care about, check the current time at a glance, or choose a future date to see what that time becomes around the world. It is useful for international meetings, remote teams, family abroad, travel plans, and friends in different time zones. Use widgets for quick access, switch between 12-hour and 24-hour time, check UTC and standard time zones, and choose a theme that fits your phone. Features: - Compare multiple cities and time zones in one list - Convert dates and times across regions - Check UTC, GMT, Zulu time, and standard time zones - Add widgets for fast world time checks - Search many cities and time zone entries - See day and night indicators - Use 12-hour or 24-hour time format - Choose from multiple theme colors - Free to use If you have feedback or need a location added, contact us at appsupport@bokeriastudio.com.

About

ShiftRest

Features
Read full description

ShiftRest is the sleep planner built for people who don't work 9-to-5. Nurses, first responders, factory and warehouse crews, drivers, pilots, security — if your schedule rotates, your sleep shouldn't be guesswork. ShiftRest turns your shift roster into a clear, personalised plan for when to sleep, when to nap, and when to stop drinking caffeine. WHY SHIFTREST • Built specifically for shift and night work — not a generic sleep app. • Works fully offline. No account, no tracking, no data collection. PLAN YOUR SLEEP AUTOMATICALLY • Add your shifts — or generate a whole rotating pattern (e.g. 4 on / 4 off) in seconds. • Get a tailored main-sleep window, a strategic nap, and a caffeine cut-off time for every shift. • See at a glance what to do now and when your next sleep begins. STAY ON TRACK • Optional reminders for bedtime, wake-up, naps, and your caffeine cut-off. • Daily check-in and streak to help you build a healthier routine. • A recovery score that blends your check-ins and consistency. • Connect Apple Health to compare how you actually slept versus your plan. • Home Screen and Lock Screen widgets show your next sleep window. DO MORE WITH PRO • Save unlimited rotation templates. • Detailed caffeine planning with a clear "last coffee by" time. • Your recovery score and Health insights. CUSTOMISE IT TO YOU • Set your target sleep, commute, wind-down time, and caffeine sensitivity. • Choose day, evening, night, custom, or rest days. PRIVATE BY DESIGN Everything stays on your device. ShiftRest collects no personal data. ShiftRest offers general guidance to help you plan rest around shift work. It is not medical advice. If you have concerns about sleep or fatigue, consult a qualified healthcare provider.

Screenshots

World Clock4 screens
ShiftRest4 screens

Verdict

The call

The clearest difference is ads: ShiftRest at none against World Clock's shown. World Clock's advantage is iOS requirement (15.0 vs 17.6). On price, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

Scorecard2 real differences · 8 level
World Clock versus ShiftRest: the parameters behind the verdict, then further details
ParameterWorld ClockShiftRest
PriceFreeFree
Rating4.8 (599 ratings) — better—
Positive reviews86.7% of reviews—
Number of ratings599 — better—
Update frequencyEvery 5 weeks—
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.6
Further details — not scored
Size32 MB2 MB
Age rating4+4+
DeveloperBokeria斌 华

Bugs and requests

World Clock

Reported bugs

9 issues
  • Widget showing blank screen instead of times
  • Widget time display stuck or frozen
  • Incorrect time display after daylight saving changes
  • Widget not working on night mode
  • Screen flickering when scrolling
Show 4 more
  • Widget configuration not saving properly
  • Date/time truncation in location field
  • Widget disappeared after recent update
  • Widget not displaying multiple cities

Requested features

12 requests
  • Alarm functionality for multiple timezones
  • Larger widget size options (2x2, 3x3)
  • Widget theme/color customization
  • Seconds display in time
  • Real-time minute updates
Show 7 more
  • Reorderable timezone list
  • Reverse time conversion capability
  • MacBook/desktop version
  • Ad-free premium version
  • Better widget transparency controls
  • Improved widget design and modernization
  • Day of week display in custom widgets

ShiftRest

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

World Clock

No in-app purchases

None

ShiftRest

No in-app purchases

Questions

Is World Clock free?
World Clock is free to download, with no in-app purchases.
Is ShiftRest free?
ShiftRest is free to download, with no in-app purchases.
Do World Clock or ShiftRest have ads?
World Clock shows ads; ShiftRest does not.

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