Comparison

DeltaClock vs Hourline

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

Head to head
About

DeltaClock

Features
Read full description

DeltaClock is a stylish world clock and time zone meeting planner built for people who work across multiple time zones. If you collaborate with teammates, clients, friends, or family in different countries, DeltaClock helps you compare cities, convert time zones, and schedule meetings without guesswork. A WORLD CLOCK YOU CAN MOVE THROUGH TIME Most world clock apps only show “now”. DeltaClock lets you scroll time forward or backward to preview any moment: • Add your key cities and instantly compare local time in each time zone • Scrub the timeline to answer “What time will it be there?” in seconds • See day and night changes, date rollovers, and time differences visually • Reduce mistakes during daylight saving time changes (DST) TIME ZONE REMINDERS THAT MAKE SENSE Create reminders based on the time in another city, and DeltaClock converts it to your local time automatically. • Schedule reminders for calls, deadlines, lessons, streams, and flights • Set reminders by “their time” (for example 9:00 in New York) and avoid mental math • Great for distributed teams, freelancers, and international routines OVERLAP PLANNER FOR REMOTE TEAMS DeltaClock is also a meeting planner: it shows overlap windows across multiple time zones so you can pick a time that works for everyone. • View overlaps for multiple cities in one planner • Build plans from overlap blocks (for example best meeting window, handover time, deep work hours) • Share plans as calendar events to keep everyone aligned • Perfect for recurring meetings, standups, interviews, and cross border projects WIDGETS: SEE TIME AT A GLANCE Add DeltaClock widgets to your Home Screen for instant time zone visibility: • City Time Widget: a stylish widget that shows the current time in your chosen city (great for your key teammate or client location) • Project Timeline Widget: a compact view that highlights overlap windows across your project cities so you can spot meeting friendly hours quickly THREE BEAUTIFUL THEMES Choose the look that fits your style: • System / Liquid Glass • Neumorphic • Retro Neumorphic A clean interface makes time zone conversion and scheduling feel effortless. WHO IT’S FOR DeltaClock is made for: • Remote work and global teams • Managers coordinating schedules across time zones • Freelancers with international clients • Students attending classes in another country • Travelers planning itineraries and check ins • Long distance relationships and families WHY DELTACLOCK DeltaClock combines a world clock, time zone converter, widgets, and meeting planner in one focused app: • Fast setup: add cities, compare time zones, find overlap • Visual timeline: understand time differences at a glance • Fewer mistakes: avoid missed meetings caused by DST or date changes • Calendar sharing: turn overlaps into real plans • Widgets: your key cities and project overlaps always visible Work across time zones with confidence. Compare time zones, plan meetings, and set time zone reminders with DeltaClock. HOW IT WORKS 1. Add the cities you care about (work, home, clients, travel). 2. Use the World Clock timeline to slide into the future or the past. 3. Switch to the Overlap Planner to find shared working hours. 4. Create a plan and export it as a calendar event to share with others. BUILT FOR CLARITY DeltaClock focuses on the most common multi time zone tasks: world clock comparison, time zone conversion, and meeting planning. Instead of doing math, you see the answer: • “Is it too late to message London?” • “When does Sydney start work?” • “What’s the best meeting time for New York, Berlin, and Tokyo?” • “If the deadline is 17:00 in LA, what time is that for me?” USE IT AS A TIME ZONE CONVERTER Need a quick time zone converter? Scrub to a time in one city and read the matching time in every other city. DeltaClock makes time zone conversion fast, visual, and reliable for daily scheduling. EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Hourline

This app displays a home screen widget that compares working hours across multiple cities. It visually indicates when people are likely awake or asleep, making it easy to find suitable times for communication.

Highlights
  • Home screen working hours comparison
  • Live, ticking clocks
  • Up to seven cities
  • Daylight saving and half-hour offsets
  • Search any city or IANA time zone
  • Offline functionality
Features
Read full description

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 — 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. • Live clocks that tick continuously, to the second • Up to seven cities, in medium and large widget sizes • The current hour underlined in every city • A day marker when a city is on a different date than yours • Search any city or IANA time zone, in any of the eight supported languages • Reorder cities — the first is home, and every offset is shown relative to it • Daylight saving and half-hour offsets handled correctly • Light and dark appearance, following your system setting Built for the small, constant question: is it a reasonable hour to message or call someone right now? No account or sign-in required. Clocks, time zone comparisons, and widgets work offline. Your city list and preferences are saved on your device.

Screenshots

DeltaClock4 screens
Hourline4 screens

Verdict

The call

The clearest difference is update cadence: DeltaClock at every 4 days against Hourline's every 2 weeks. Hourline's advantage is iOS requirement (16.4 vs 18.0). On price, ads, in-app purchases and device support 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. DeltaClock sells 3 in-app purchases, starting at $1.99 per month and Hourline sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

DeltaClock ships an update every 4 days, Hourline every 2 weeks. The most recent releases landed on October 30, 2026 and November 10, 2026 respectively.

Scorecard2 real differences · 7 level
DeltaClock versus Hourline: the parameters behind the verdict, then further details
ParameterDeltaClockHourline
PriceFreeFree
Rating—1.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 4 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesYesYes
Monetization—Free
DevicesiPhone, iPad — betteriPhone
Requires iOS18.016.4 — better
Further details — not scored
Size24 MB52 MB
Age rating4+4+
DeveloperAmeliia ShekikhachevaJin Woo Park

In-app purchases

3 purchases

DeltaClock

Subscriptions2
  • Pro Subscription Monthly$1.991 Month
  • Pro Subscription Annual$9.991 Year
One-time1
  • Lifetime purchase$24.99
1 purchases

Hourline

One-time1
  • Unlock Customizations$4.99

Questions

Is DeltaClock free?
DeltaClock is free to download, with in-app purchases available.
Is Hourline free?
Hourline is free to download, with in-app purchases available.
Do DeltaClock or Hourline have ads?
Neither DeltaClock nor Hourline shows ads.
Which is updated more often, DeltaClock or Hourline?
DeltaClock ships an update every 4 days, and Hourline every 2 weeks. Most recently, DeltaClock was updated on October 30, 2026 and Hourline on November 10, 2026.

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