DeltaClock vs Zonal Time
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
DeltaClock
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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 βnowβ. DeltaClock lets you scroll time forward or backward to preview any moment: β’ Add your key cities and instantly compare local time in each time zone β’ Scrub the timeline to answer βWhat time will it be there?β in seconds β’ See day and night changes, date rollovers, and time differences visually β’ 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. β’ Schedule reminders for calls, deadlines, lessons, streams, and flights β’ Set reminders by βtheir timeβ (for example 9:00 in New York) and avoid mental math β’ 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. β’ View overlaps for multiple cities in one planner β’ Build plans from overlap blocks (for example best meeting window, handover time, deep work hours) β’ Share plans as calendar events to keep everyone aligned β’ 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: β’ City Time Widget: a stylish widget that shows the current time in your chosen city (great for your key teammate or client location) β’ 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: β’ System / Liquid Glass β’ Neumorphic β’ Retro Neumorphic A clean interface makes time zone conversion and scheduling feel effortless. WHO ITβS FOR DeltaClock is made for: β’ Remote work and global teams β’ Managers coordinating schedules across time zones β’ Freelancers with international clients β’ Students attending classes in another country β’ Travelers planning itineraries and check ins β’ Long distance relationships and families WHY DELTACLOCK DeltaClock combines a world clock, time zone converter, widgets, and meeting planner in one focused app: β’ Fast setup: add cities, compare time zones, find overlap β’ Visual timeline: understand time differences at a glance β’ Fewer mistakes: avoid missed meetings caused by DST or date changes β’ Calendar sharing: turn overlaps into real plans β’ 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: β’ βIs it too late to message London?β β’ βWhen does Sydney start work?β β’ βWhatβs the best meeting time for New York, Berlin, and Tokyo?β β’ βIf the deadline is 17:00 in LA, what time is that for me?β 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/
Zonal Time
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Zonal is a beautifully crafted world clock for people who live, work, and connect across time zones. Whether you're scheduling a call with a client in Tokyo, checking in on family in London, coordinating with a remote team in New York, or planning a trip to SΓ£o Paulo β Zonal makes it effortless to know what time it is, anywhere in the world, at any moment. Your world, on one screen. Add any city from over 100 destinations worldwide, or choose from all 50 US states and Washington DC. Each location appears as a sleek card showing the local time, date, timezone abbreviation, UTC offset, and a live day-progress bar that visualizes exactly where in the 24-hour cycle that place currently sits. A time-of-day phase label β Dawn, Morning, Afternoon, Evening, Night, or Late Night β tells you at a glance whether your contact is starting their day or winding down for the night. Slide through time. Zonal's timeline slider lets you move forward or backward up to 12 hours and watch every city on your list update simultaneously. Finding a meeting window that works for everyone has never been simpler. See the overlap, pick the time, and get on with your day. Set any time, any city. Tap the time display on any card to set a specific local time for that city using an elegant iOS-style wheel picker. Dial in the exact hour and minute and Zonal instantly converts it across every location on your list β accounting for timezone offsets and daylight saving rules automatically. Need to pin a specific date and time? Use the built-in date and time picker to lock in any moment, past or future. Daylight saving, handled automatically. Zonal applies daylight saving rules for every location based on the exact date you're viewing. Scroll forward to November and watch US cities shift back an hour. Jump to summer in Australia and see the southern hemisphere DST come into effect. A clear DST badge on each card tells you when a clock has shifted so there are never any surprises. Reorder your world your way. Press and hold the drag handle on any card to pick it up and move it to exactly where you want it. A smooth floating preview follows your finger while a gold indicator shows precisely where the card will land. Designed to be enjoyed. Zonal ships with two refined themes β a deep dark mode with warm gold accents for night-time use, and a light parchment mode that's equally premium in daylight. Your preference is saved automatically. Every detail, from the serif clock numerals to the hairline progress bars and the gentle animations, has been considered as part of a cohesive, considered design. Zonal isn't just a utility you reach for reluctantly. It's an instrument you'll actually enjoy using.
Screenshots
Verdict
The clearest difference is in-app purchases: Zonal Time at none against DeltaClock's 3. Zonal Time also leads on iOS requirement (15.0 vs 18.0). On price, update cadence, ads and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. DeltaClock sells 3 in-app purchases, starting at $1.99 per month. Zonal Time asks for nothing beyond the download.
DeltaClock ships an update every 4 days, Zonal Time every 2 days. Both last shipped on September 8, 2026.
| Parameter | DeltaClock | Zonal Time |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 days | Every 2 days β better |
| Ads | No | No |
| In-app purchases | Yes | No β better |
| Devices | iPhone, iPad | iPhone, iPad, iPod β better |
| Requires iOS | 18.0 | 15.0 β better |
| Further details β not scored | ||
| Size | 24 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Ameliia Shekikhacheva | Rami AlZaid |
In-app purchases
DeltaClock
- Pro Subscription Monthly$1.991 Month
- Pro Subscription Annual$9.991 Year
- Lifetime purchase$24.99
Zonal Time
No in-app purchases









