Time Zone Difference Planner vs Shadowline
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Time Zone Difference Planner
Read full descriptionHide full description
PREMIUM — 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 — 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 — daylight saving shifts, half-hour zones like India, even quarter-hour zones like Kathmandu — 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 • A 24-hour overlap band in your own local time — gold hours mean everyone is at their desk; tap one for the exact local time and day in every city • Best meeting windows ranked by length, so the longest shared stretch is always suggestion number one • Live clocks for up to 8 cities with an at-their-desk indicator, chosen from 400+ searchable time zones • Working hours per zone — set Berlin to 8–16 and Sydney to 10–18 and the overlap recalculates instantly • A daily reminder the moment your team's shared window opens, so you catch everyone while they are online • One-tap sharing that writes the proposed meeting out in every invitee's own local time and date PERFECT FOR • Remote teams spread across continents who lose the first ten minutes of every week to scheduling • Freelancers and agencies booking calls with the US, Europe, and Asia in the same week • Long-distance families and couples who want to ring while everyone is actually awake • 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 — 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 — 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
Shadowline
Visualize time zones with elegant clock faces or a single 24-hour dial. Plan meetings, manage jet lag with science-based advice, and view a live day & night map. Widgets offer at-a-glance city times.
- World clocks with customizable themes
- 24-hour dial for at-a-glance time comparison
- Meeting planner with calendar integration
- Jet lag adjustment plans
- Live day & night map with moon phase
- Home and Lock Screen widgets
Read full descriptionHide full description
Shadowline turns time zones into something you can actually see. Track the cities that matter to you, then read them at a glance — as elegant clock faces, or on a single 24-hour dial where every city sits on one ring so you instantly see who's awake, who's asleep, and the hours you overlap. FEATURES • World clocks — Add any city on Earth and see its time, day or night, and offset from you. Reorder, rename, and theme each one. • 24-hour dial — All your cities on one circular timeline. Drag to scrub through the day and find a time that works everywhere. • Meeting planner — Swipe through upcoming hours and watch every city update together. Found a slot? Add it straight to your calendar. • JetLag IQ — Heading somewhere new? Get a simple, science-based plan to shift your body clock and land ready. • Day & night map — A live world map with the real sunlight terminator, plus sunrise, sunset, and moon phase. • Widgets — Put your favorite cities and the dial on your Home and Lock Screen in styles that match your look. Everything runs entirely on your device. No account, no ads, no tracking — your cities and settings never leave your phone. SHADOWLINE PRO Free to use with up to three cities. Unlock Shadowline Pro once — a single $2.49 purchase, no subscription — for unlimited cities, every widget style, and import/export. Yours forever.
Screenshots
Verdict
The clearest difference is in-app purchases: Time Zone Difference Planner at none against Shadowline's 1. Shadowline's advantage is update cadence (every 2 days vs every 4 months). On price, ads, device support and iOS requirement 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
Both are free to download. Shadowline 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, Shadowline every 2 days. The most recent releases landed on October 22, 2026 and October 6, 2026 respectively.
| Parameter | Time Zone Difference Planner | Shadowline |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 4 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 5 MB | 40 MB |
| Age rating | 4+ | 4+ |
| Developer | LEAN ASIA CO., LTD | KKB CoRi Technologies Private Limited |
In-app purchases
Time Zone Difference Planner
No in-app purchases
Shadowline
- Shadowline Pro$2.49
Questions
Is Time Zone Difference Planner free?
Is Shadowline free?
Do Time Zone Difference Planner or Shadowline have ads?
Which is updated more often, Time Zone Difference Planner or Shadowline?
Other comparisons















