DeltaClock vs TimeZone Expert
Price, ratings, monetisation and update history for both apps, side by side — 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 “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/
TimeZone Expert
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TimeZone Expert helps you compare world times and plan across time zones with less guesswork. Choose your local city, add related cities, and instantly see the matching time around the world. Adjust one time and every city updates together, making it easier to find a good time for meetings, calls, travel planning, or staying connected with family and friends abroad. TimeZone Expert also highlights weekends, public holidays, and off-work hours, so you can avoid inconvenient times before sending an invite. Key features: • Compare multiple cities at the same time • Adjust one time and see all cities update together • Automatically detect your local city or choose it manually • Search cities, countries, and time zones • Show weekends, public holidays, and off-work hours • Add selected times to your calendar • Support for Apple Calendar, Google Calendar, and Outlook • Home Screen widgets for quick time checks • Apple Watch support for your selected cities • Custom holidays and office closures for specific cities • Built-in language support for international users TimeZone Expert is designed for remote teams, international families, frequent travelers, global students, and anyone who works or communicates across time zones.
Screenshots
Verdict
The clearest difference is in-app purchases: TimeZone Expert at none against DeltaClock's 3. On price, update cadence, ads 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
Both are free to download. DeltaClock sells 3 in-app purchases, starting at $1.99 per month. TimeZone Expert asks for nothing beyond the download.
DeltaClock ships an update every 4 days, TimeZone Expert every 5 days. The most recent releases landed on September 8, 2026 and July 21, 2026 respectively.
| Parameter | DeltaClock | TimeZone Expert |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 days — better | Every 5 days |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad | iPhone, iPad, Apple Watch — better |
| Requires iOS | 18.0 | 18.0 |
| Further details — not scored | ||
| Size | 24 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Ameliia Shekikhacheva | Po-Han Chen |
In-app purchases
DeltaClock
- Pro Subscription Monthly$1.991 Month
- Pro Subscription Annual$9.991 Year
- Lifetime purchase$24.99
TimeZone Expert
No in-app purchases





