Comparison

ONE WATCH vs ZoneTime

Price, ratings, monetisation and update history for both apps, side by side โ€” 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 โ€” 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 โ€” 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

ZoneTime

Features
Read full description

ZoneTime lines up every city you care about on one swipeable timeline, so you can see who's awake, spot the best time to call, and share the plan in one tap. No account. No sign-up. No email. No ads. Open it, add your cities, and plan the call. FEATURES โ€ข A synced timeline for every city, color-coded by work hours, awake hours, and night โ€ข 7,000+ cities and every timezone, searchable offline โ€” even by abbreviation like EST or CET โ€ข Tap the timeline to plan a meeting, drag either edge to adjust it, and share by email, calendar, or message โ€ข Groups for teams, family, or clients, with custom labels for each person โ€ข Automatic daylight saving handling โ€ข Light and dark themes, 12- or 24-hour time Your cities and groups stay on your iPhone, and every timezone lookup works offline. No tracking of you across other companies' apps or websites, and nothing shared with data brokers. TELL ME WHAT TO BUILD See something in another world clock that you wish this one had? Email mark@vibecode.review. I read every message and I build what people actually ask for โ€” that is how most of this app got here. I build these apps on my own, in retirement, as a way of giving back. No company, no investors, no marketing budget โ€” what you pay goes purely into developing the next feature and the next app. You'll probably laugh at what I charge. Free to start, no commitment up front. Most apps want that decision before you've seen a screen, then quietly bill you. Not this one โ€” nothing to remember to cancel. After 7 days of use it asks you to unlock it โ€” one payment, and that's the last you'll hear of it. Still not sure? Extend another week, free โ€” I'd rather you were genuinely happy with it before you pay. This app alone, or $5.99 for all 10 โ€” full apps across different categories, each one built because someone asked, and your payment covers every new app you ask me to build too. Never a subscription โ€” yours for good, updates included.

Screenshots

ONE WATCH4 screens
ZoneTime4 screens

Verdict

The call

The clearest difference is device support: ONE WATCH at 3 against ZoneTime's 1. ZoneTime's advantage is iOS requirement (16.4 vs 18.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. ONE WATCH sells 3 in-app purchases, starting at $2.99 per month and ZoneTime sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 days. The most recent releases landed on October 9, 2026 and October 18, 2026 respectively.

Scorecard2 real differences ยท 4 level
ONE WATCH versus ZoneTime: the parameters behind the verdict, then further details
ParameterONE WATCHZoneTime
PriceFreeFree
Update frequencyEvery 3 daysEvery 3 days
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad, Apple Watch โ€” betteriPhone
Requires iOS18.016.4 โ€” better
Further details โ€” not scored
Size52 MB51 MB
Age rating4+4+
DeveloperJohann SzebeniMeng-Yi Hsu

In-app purchases

3 purchases

ONE WATCH

Subscriptions2
  • Premium Monthly$2.991 Month
  • Premium Yearly$24.991 Year
One-time1
  • Premium Lifetime$99.99
3 purchases

ZoneTime

One-time3
  • All-Apps Unlock$5.99
  • Unlock ZoneTime$7.99
  • Unlock ZoneTime Final$9.99

Questions

Is ONE WATCH free?
ONE WATCH is free to download, with in-app purchases available.
Is ZoneTime free?
ZoneTime is free to download, with in-app purchases available.
Do ONE WATCH or ZoneTime have ads?
Neither ONE WATCH nor ZoneTime shows ads.
Which is updated more often, ONE WATCH or ZoneTime?
ONE WATCH ships an update every 3 days, and ZoneTime every 3 days. Most recently, ONE WATCH was updated on October 9, 2026 and ZoneTime on October 18, 2026.

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