Comparison

World Alarms vs Ops Clock

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

Head to head
About

World Alarms

Set precise alarms for any timezone with this intuitive clock app, offering thousands of global locations. Convert times instantly, set alarms for specific local times worldwide, and track countdowns. It works offline and automatically handles daylight saving time.

Highlights
  • Precise timezone alarms
  • Global location support
  • Instant time conversion
  • Offline functionality
  • Daylight saving time handling
  • UTC time support
Features
Read full description

Set precise alarms for any timezone with this powerful yet intuitive clock app. Choose from thousands of global locations—far more than Apple's World Clock offers. Key Features: - Instantly convert times between your location and any city worldwide - Set alarms that trigger at the exact local time of your chosen location - Direct UTC time support for aviation professionals and technical users - Track countdown timers showing exactly how long until your alarms - Choose from multiple alarm sounds or silent notifications - Works completely offline—perfect for travel and airplane mode - Automatically handles daylight saving time adjustments - Zero ads or interruptions—just pure functionality Perfect for international travellers, remote workers, global families, and anyone coordinating across time zones. Never miss an important call, meeting, or event again—no matter where in the world it's happening. Use it as a sophisticated alternative to built-in reminder apps, with the added power of international time conversion.

About

Ops Clock

A versatile utility app offering a world clock with over 400 cities, unlimited timers, and three powerful calculators for time zone, time, and date arithmetic. It also features an event log to track real-time occurrences and elapsed times.

Highlights
  • World clock with 400+ cities
  • Unlimited count-up and countdown timers
  • Time zone, time, and date calculators
  • Event log with elapsed time tracking
  • Customizable labels and notifications
Features
Read full description

Professional grade clock and timer tool with four functions in one app: • World clock • Digital seconds display • Compact format • Over 400 cities • Set custom labels • Clocks sorted automatically • Unlimited number of timers • Count-up timers • Countdown timers • Wall clock timers • End-time notifications • Pre-notifications • Elapsed time and ETA in any zone • Three calculators • Time zone calculator helps plan multi-city conf calls • Time calculator for time arithmetic, including across different time zones • Date calculator for date arithmetic • Event Log • Stores a record of real-time events • Shows elapsed time between events This app is free, shows no advertisements, makes no use of the network and collects no personal information. Available in English, Spanish, French, Italian and Portuguese.

Screenshots

World Alarms4 screens
Ops Clock4 screens

Verdict

The call

The clearest difference is rating: Ops Clock at 4.7 against World Alarms's 4.2. World Alarms's advantage is update cadence (monthly vs every 5 months) and iOS requirement (13.4 vs 15.0). On price, review sentiment, ratings volume and ads 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.

ReceptionRating · Positive reviews · Number of ratings

Ops Clock holds the better App Store score, 4.7 against 4.2. Both are backed by a comparable volume of ratings — 5 and 11 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

World Alarms ships an update monthly, Ops Clock every 5 months. The most recent releases landed on September 14, 2026 and August 25, 2026 respectively.

Scorecard3 real differences · 7 level
World Alarms versus Ops Clock: the parameters behind the verdict, then further details
ParameterWorld AlarmsOps Clock
PriceFreeFree
Rating4.2 (5 ratings)4.7 (11 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings511 — better
Update frequencyMonthly — betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.4 — better15.0
Further details — not scored
Size13 MB2 MB
Age rating4+4+
DeveloperSwati PatelJames Kretchmar

Customer experience

World Alarms

All ratings5 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Ops Clock

All ratings11 ratings
Positive90.9%
Neutral0.0%
Negative9.1%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

World Alarms

No in-app purchases

None

Ops Clock

No in-app purchases

Questions

Is World Alarms free?
World Alarms is free to download, with no in-app purchases.
Is Ops Clock free?
Ops Clock is free to download, with no in-app purchases.
Which has better reviews, World Alarms or Ops Clock?
Ops Clock is rated higher. World Alarms averages 4.2 out of 5 from 5 ratings, while Ops Clock averages 4.7 from 11 ratings.
Do World Alarms or Ops Clock have ads?
Neither World Alarms nor Ops Clock shows ads.
Which is updated more often, World Alarms or Ops Clock?
World Alarms ships an update monthly, and Ops Clock every 5 months. Most recently, World Alarms was updated on September 14, 2026 and Ops Clock on August 25, 2026.

Other comparisons