Comparison

ONE WATCH vs TimeZone Expert

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

Head to head
About

ONE WATCH

Features
Read full description

ONE WATCH shows you the local time, live weather, and the perfect moment to call - for everyone who matters to you. Across iPhone, iPad, Apple Watch, and home-screen widgets. +++ KNOW WHEN TO CALL A traffic-light indicator tells you in one glance: green when it's a good time, orange when it's borderline, red when it's the middle of the night. Set per-contact call windows, weekday availability, and time-zone preferences. +++ PHOTO WIDGETS Add your contacts with their real photo and see them on your home screen and Apple Watch. World clock, but personal. +++ LIVE WEATHER Each contact card shows the current weather at their location, powered by Apple Weather. Useful for travel planning, meeting coordination, or just being a thoughtful friend. +++ APPLE WATCH + COMPLICATIONS Full Apple Watch app with all complication slots — see your people on every watch face. +++ EVENT CONVERTER Plan meetings across time zones. Pick a moment, see what time it is for everyone. +++ 12 LANGUAGES English, German, Spanish, Portuguese, French, Italian, Dutch, Japanese, Korean, Chinese, Hindi, Arabic. +++ LIGHT & DARK MODE Beautifully designed for both — choose your preference or follow the system. +++ PRIVACY FIRST No accounts. No tracking. No analytics. No ads. Contact data stays on your device, never uploaded anywhere. Weather data is fetched via Apple WeatherKit. +++ ONE WATCH PREMIUM Unlock home-screen widgets, Apple Watch app + complications, multiple contact photos, weekday selector, per-contact availability toggle, and analog clock styles. Choose monthly, yearly, or a one-time lifetime purchase. Family Sharing supported. Privacy Policy: https://onewatch.onepage.me/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Made in Austria.

About

TimeZone Expert

Features
Read full description

TimeZone Expert helps you compare world times and plan across time zones with less guesswork. Choose your local city, add related cities, and instantly see the matching time around the world. Adjust one time and every city updates together, making it easier to find a good time for meetings, calls, travel planning, or staying connected with family and friends abroad. TimeZone Expert also highlights weekends, public holidays, and off-work hours, so you can avoid inconvenient times before sending an invite. Key features: • Compare multiple cities at the same time • Adjust one time and see all cities update together • Automatically detect your local city or choose it manually • Search cities, countries, and time zones • Show weekends, public holidays, and off-work hours • Add selected times to your calendar • Support for Apple Calendar, Google Calendar, and Outlook • Home Screen widgets for quick time checks • Apple Watch support for your selected cities • Custom holidays and office closures for specific cities • Built-in language support for international users TimeZone Expert is designed for remote teams, international families, frequent travelers, global students, and anyone who works or communicates across time zones.

Screenshots

ONE WATCH4 screens
TimeZone Expert3 screens

Verdict

The call

The clearest difference is in-app purchases: TimeZone Expert at none against ONE WATCH's 3. On price, update cadence, ads and device support there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. ONE WATCH sells 3 in-app purchases, starting at $2.99 per month. TimeZone Expert asks for nothing beyond the download.

UpkeepUpdate frequency

ONE WATCH ships an update every 3 days, TimeZone Expert every 5 days. The most recent releases landed on October 9, 2026 and September 30, 2026 respectively.

Scorecard1 real difference Ā· 5 level
ONE WATCH versus TimeZone Expert: the parameters behind the verdict, then further details
ParameterONE WATCHTimeZone Expert
PriceFreeFree
Update frequencyEvery 3 days — betterEvery 5 days
AdsNoNo
In-app purchasesYesNo — better
DevicesiPhone, iPad, Apple WatchiPhone, iPad, Apple Watch
Requires iOS18.018.0
Further details — not scored
Size52 MB14 MB
Age rating4+4+
DeveloperJohann SzebeniPo-Han Chen

In-app purchases

3 purchases

ONE WATCH

Subscriptions2
  • Premium Monthly$2.991 Month
  • Premium Yearly$24.991 Year
One-time1
  • Premium Lifetime$99.99
None

TimeZone Expert

No in-app purchases

Questions

Is ONE WATCH free?
ONE WATCH is free to download, with in-app purchases available.
Is TimeZone Expert free?
TimeZone Expert is free to download, with no in-app purchases.
Do ONE WATCH or TimeZone Expert have ads?
Neither ONE WATCH nor TimeZone Expert shows ads.
Which is updated more often, ONE WATCH or TimeZone Expert?
ONE WATCH ships an update every 3 days, and TimeZone Expert every 5 days. Most recently, ONE WATCH was updated on October 9, 2026 and TimeZone Expert on September 30, 2026.

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