Time Zone Difference Planner vs Hourline
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Time Zone Difference Planner
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PREMIUM โ PURCHASE REQUIRED: All features described below are part of Pro and require a purchase: a weekly or yearly auto-renewing subscription, or a one-time lifetime purchase. Stop doing time zone math before every call. TimezoneWorld lays your whole team on one 24-hour band, colors the hours when everyone is actually at their desk, and ranks the best meeting windows for you โ so "does 9 AM my time work for Sydney?" is answered the moment you open the app. Most world clocks show you a row of times and leave the hard part to you. TimezoneWorld starts where they stop: you set each city's working hours, and its overlap engine walks the real calendar โ daylight saving shifts, half-hour zones like India, even quarter-hour zones like Kathmandu โ to find the hours when every city is inside its working day. Tap any hour on the band and see exactly what the clock reads in every city, and on which date. WHAT YOU GET โข A 24-hour overlap band in your own local time โ gold hours mean everyone is at their desk; tap one for the exact local time and day in every city โข Best meeting windows ranked by length, so the longest shared stretch is always suggestion number one โข Live clocks for up to 8 cities with an at-their-desk indicator, chosen from 400+ searchable time zones โข Working hours per zone โ set Berlin to 8โ16 and Sydney to 10โ18 and the overlap recalculates instantly โข A daily reminder the moment your team's shared window opens, so you catch everyone while they are online โข One-tap sharing that writes the proposed meeting out in every invitee's own local time and date PERFECT FOR โข Remote teams spread across continents who lose the first ten minutes of every week to scheduling โข Freelancers and agencies booking calls with the US, Europe, and Asia in the same week โข Long-distance families and couples who want to ring while everyone is actually awake โข Travelers who need home time, destination time, and the difference between them at a glance WHY NOT JUST USE A WORLD CLOCK? A world clock tells you it is 3 AM in Tokyo. It does not tell you when Tokyo, Berlin, and Chicago are all working at the same time โ that is a search across 24 hours and every zone's own working day, with daylight saving moving the goalposts twice a year. TimezoneWorld runs that search for you and simply shows the answer. PRIVATE BY DEFAULT Everything is computed on your iPhone from the system's own time zone database. No account, no sign-in, no tracking โ and the app works fully offline. PREMIUM (PURCHASE REQUIRED) TimezoneWorld is unlocked by a single purchase of your choice: a Weekly subscription, a Yearly subscription, or a one-time Lifetime purchase. Full access includes all 8 zone slots, the 24-hour overlap band, ranked meeting windows, per-zone working hours, the daily overlap reminder, and meeting-time sharing. Add your cities, set the working hours, and let your next "when works for you?" answer itself. Terms of Use: https://leanstudio.asia/terms-of-use Privacy Policy: https://leanstudio.asia/privacy-policy Support: support@leanstudio.asia
Hourline
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Hourline puts a working-hours comparison on your home screen. Each city gets a strip of hours running from four hours back to eight hours ahead. Every column is the same moment in every city, so reading straight down tells you what time it is in each place โ and whether anyone is awake. Color does the rest. Easily see working hours, early morning, evening, and night. Finding a window where three cities are all in daylight takes about a second. โข Live clocks that tick continuously, to the second โข Up to seven cities, in medium and large widget sizes โข The current hour underlined in every city โข A day marker when a city is on a different date than yours โข Search any city or IANA time zone โข Reorder cities โ the first is home, and every offset is shown relative to it โข Daylight saving and half-hour offsets handled correctly Built for the small, constant question: is it a reasonable hour to message or call someone right now? No account. No sign-in. No network requests at all. Your city list is stored on your device and is the only thing the app keeps.
Screenshots
Verdict
The clearest difference is in-app purchases: Time Zone Difference Planner at none against Hourline's 1. Hourline's advantage is update cadence (every 2 weeks vs every 4 months). On price, ads, device support and iOS requirement 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
Both are free to download. Hourline sells 1 one-off in-app purchase. Time Zone Difference Planner asks for nothing beyond the download.
Time Zone Difference Planner ships an update every 4 months, Hourline every 2 weeks. The most recent releases landed on October 22, 2026 and October 25, 2026 respectively.
| Parameter | Time Zone Difference Planner | Hourline |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 months | Every 2 weeks โ better |
| Ads | No | No |
| In-app purchases | No โ better | Yes |
| Devices | iPhone | iPhone |
| Requires iOS | 17.0 | 16.4 โ better |
| Further details โ not scored | ||
| Size | 5 MB | 46 MB |
| Age rating | 4+ | 4+ |
| Developer | LEAN ASIA CO., LTD | Jin Woo Park |
In-app purchases
Time Zone Difference Planner
No in-app purchases
Hourline
- Unlock Customizations$4.99
Questions
Is Time Zone Difference Planner free?
Is Hourline free?
Do Time Zone Difference Planner or Hourline have ads?
Which is updated more often, Time Zone Difference Planner or Hourline?
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