UTC ALARM vs TZ24
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
UTC ALARM
This utility app allows users to set alarms based on Coordinated Universal Time (UTC), also known as Zulu time. It is ideal for professionals who work across different time zones, such as pilots and cabin crew, ensuring timely notifications regardless of local time.
- Set alarms in UTC (Zulu time)
- Multiple custom named alarms
- Reliable notifications
- Large, clear UTC time display
- Clean, dark interface
- Works offline
- No account required
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UTC ALARM - Set alarms in Coordinated Universal Time (Zulu time). Perfect for pilots, cabin crew, aviation professionals, and anyone working across time zones. Set alarms that trigger at exact UTC times, regardless of your local timezone. Features: • Large, clear UTC time display • Create multiple alarms with custom names • Reliable notifications even when the app is closed • Clean, dark interface optimized for iPad • No account required - works offline Free with no ads.
TZ24
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Your world clocks, right on your home screen. TZ24 is a world clock and time zone converter that makes it easy to check global time, compare cities, set reminders, and track your favourite locations with customisable home-screen widgets. Whether you're working with international teams, traveling, or staying connected with loved ones abroad, TZ24 helps you stay in sync. NEW: HOME-SCREEN WORLD CLOCK WIDGETS Keep the time zones that matter most just a glance away. Choose from four useful widget layouts: • Compare Time Widget See and compare the time in two cities directly from your home screen. • Single Time Widget Display the local time for one selected city. • Multi-City Widget Track multiple city clocks together in one convenient widget. • Compact Multi Time Widget Keep a smaller selection of global times visible in a space saving layout. Check important city times without opening the app. WORLD CLOCK YOUR FAVOURITE CITIES TOGETHER Add the cities you care about and view their current local times in one organised dashboard. See time differences and UTC offsets to understand how time changes around the world. COMPARE TIME ZONES EASILY Compare the time between two cities with a simple time zone converter. Whether you're coordinating an international meeting or planning a call with friends abroad, TZ24 makes comparing time zones straightforward. EXPLORE THE WORLD TIME ZONE MAP Discover global time zones using an interactive map. Explore UTC offsets and better understand time differences across countries and regions. SET OFFLINE TIME ZONE REMINDERS Create reminders for selected time zones and stay organised when planning activities across countries. PERSONALISE YOUR WORLD CLOCK • Four home-screen widget layouts • Multiple city clocks • Time zone comparison • Interactive global time zone map • Offline reminders • 12-hour and 24-hour formats • Optional seconds display • Theme customisation • Notification preferences and haptic feedback PERFECT FOR GLOBAL LIVING Remote Workers Keep important international time zones visible while coordinating with colleagues. Traveler's Follow local times across your favourite destinations. Friends & Families Stay connected with people living in different countries. Global Professionals Compare times before making international calls. Make every time zone easier to manage. Download TZ24 and keep the world on your home screen.
Screenshots
Verdict
The clearest difference is update cadence: UTC ALARM at every 11 days against TZ24's every 2 months. TZ24's advantage is iOS requirement (15.0 vs 17.0). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
UTC ALARM ships an update every 11 days, TZ24 every 2 months. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.
| Parameter | UTC ALARM | TZ24 |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 11 days — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | MAXIME CLEMENT SIMON LAURENT | Sergio Vazquez |
In-app purchases
UTC ALARM
No in-app purchases
TZ24
No in-app purchases









