Comparison

Shadowline vs Clock Stamp

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

Head to head
About

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.

Highlights
  • 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
Features
Read 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.

About

Clock Stamp

This app displays multiple city time zones on a single, elegant clock face. It provides visual context for day, night, and weather in each location, aiding in travel planning and international communication.

Highlights
  • Multiple city time zones
  • Visual analog world clock
  • Local time difference display
  • Weather and day/night context
  • 12-hour and 24-hour modes
  • Light and dark appearance
Features
Read full description

Clock Stamp makes world time easy to read. See the time in several cities at once on one elegant dial, and check time differences, whether it's day or night, and the local weather at a glance. • Dial: every city sits on the dial, so time differences and daylight are clear at a glance • City search: search Apple Maps for cities and towns worldwide, and add as many as you like • Local Time: follows your location, or uses your phone's time zone • Weather: local weather at a glance, with backgrounds and weather effects that follow each city's time and weather • iPhone Duo: controls within reach of your thumb on both displays, and a live map of Earth showing day and night when it's open • 12/24-hour dial, Light/Dark appearance, Celsius/Fahrenheit, two text sizes • Six languages: English, 简体中文, Français, Italiano, 日本語, 한국어 • Supports VoiceOver and Reduce Motion Made for working across borders, remote meetings, planning trips, studying abroad, and keeping in touch with friends and family in other time zones.

Screenshots

Shadowline4 screens
Clock Stamp4 screens

Verdict

The call

The clearest difference is in-app purchases: Clock Stamp at none against Shadowline's 1. Shadowline's advantage is iOS requirement (17.0 vs 26.2). On price, rating, ratings volume and update cadence 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. Shadowline sells 1 one-off in-app purchase. Clock Stamp asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Shadowline against 5.0 for Clock Stamp. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 days. Both last shipped on October 31, 2026.

Scorecard3 real differences · 6 level
Shadowline versus Clock Stamp: the parameters behind the verdict, then further details
ParameterShadowlineClock Stamp
PriceFreeFree
Rating5.0 (1 ratings)5.0 (1 ratings)
Number of ratings11
Update frequencyEvery 2 daysEvery 2 days
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad — betteriPhone
Requires iOS17.0 — better26.2
Further details — not scored
Size40 MB4 MB
Age rating4+4+
DeveloperKKB CoRi Technologies Private LimitedZhicheng Chen

Customer experience

Shadowline

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Clock Stamp

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

Shadowline

One-time1
  • Shadowline Pro$2.49
None

Clock Stamp

No in-app purchases

Questions

Is Shadowline free?
Shadowline is free to download, with in-app purchases available.
Is Clock Stamp free?
Clock Stamp is free to download, with no in-app purchases.
Which has better reviews, Shadowline or Clock Stamp?
Shadowline and Clock Stamp are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do Shadowline or Clock Stamp have ads?
Neither Shadowline nor Clock Stamp shows ads.
Which is updated more often, Shadowline or Clock Stamp?
Shadowline ships an update every 2 days, and Clock Stamp every 2 days. Most recently, Shadowline was updated on October 31, 2026 and Clock Stamp on October 31, 2026.

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