Tempus World Clock vs Meridiem
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Tempus World Clock
Easily track multiple time zones with customizable clocks for people and places. Convert times instantly, find optimal meeting slots across different regions, and view city details including weather and sunrise/sunset.
- Customizable clocks with names and colors
- Instant time conversion across zones
- Meeting time finder with working hours
- City detail view with weather and sunrise/sunset
- Apple Watch app and complications
- Home Screen widgets
- iCloud sync across devices
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Tempus is a world clock and time zone converter built for people who work, travel, and stay in touch across time zones. It is at home on iPhone, iPad, and Apple Watch. NAME YOUR CLOCKS Add clocks for cities or for the people you talk to. Give each one a custom name, an emoji, and a color tag so "Mum in Sydney" or "Design team, Berlin" is readable at a glance. Choose emoji from a searchable catalog with recents and suggestions for the city. Pick analog or digital faces, 12 or 24 hour time, and see the time difference from wherever you are. CONVERT TIMES INSTANTLY Pick any time in any zone and see it in all your clocks at once. Drag the time scrubber to slide through the day and watch every clock move together. Day and night indicators follow the working hours you set for each city, so you can see at a glance who is reachable. PROFILES Group your clocks into profiles such as Work or Family and switch between them from the title on iPhone or the sidebar on iPad. A city can be in several profiles, and the active profile syncs to your other devices and Apple Watch. REMINDERS IN ANOTHER CITY'S TIME Set a reminder for 9:00 in Tokyo and Tempus alerts you when it is 9:00 there, whatever time it is where you are. Anchor a reminder to the city or to your own time, repeat it every day or on the weekdays you choose, or set it for a single date. Label it, pause it without deleting it, and turn alerts off on a device you would rather keep quiet. ON THE LOCK SCREEN Keep a reference city in the Dynamic Island and on the Lock Screen, with its current time and how far ahead or behind you it is. A countdown appears there before a reminder is due. FIND A MEETING TIME THAT WORKS Select two or more clocks, set working hours for each, and Tempus shows the overlapping windows where everyone is available. Add the meeting to your calendar in one tap or share it as an .ics invite. CITY DETAIL Tap any clock for a full city view: a skyline illustration that changes with the time of day, sunrise and sunset on a daylight arc, and current weather conditions. IPAD On iPad, Tempus uses a native split layout: browse your clocks in a sidebar while City Detail stays open beside them. Time Converter and Meeting Finder open in the detail column with room for a full-width overlap timeline. Keyboard shortcuts and pointer hover are supported throughout. APPLE WATCH Tempus on Apple Watch shows your clocks on your wrist, lets you convert times with the Digital Crown, and offers complications for your favorite clocks. Clocks sync instantly between iPhone and Apple Watch. WIDGETS AND SYNC Home Screen widgets keep your clocks in view. Your clocks sync across all your devices with iCloud. PRIVACY FIRST Tempus has no account, no ads, and no tracking. Your clocks are stored on your device and in your private iCloud database. Weather is provided by Apple Weather for the cities you add, never for your own location.
Meridiem
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Meridiem is a world clock built for people who live across time zones — remote teams, long-distance relationships, frequent travelers, and anyone who needs to know what time it is somewhere else, at a glance. See the whole picture on a living 3D globe that tracks day and night in real time, with every city you follow pinned right where it belongs. Switch to Timeline to compare hours side by side, and let Golden Hour do the math for you — it automatically finds the best overlapping window to call, meet, or message someone in a different time zone. FEATURES - Interactive 3D globe with a real-time day/night terminator - Golden Hour: automatically finds the best time to connect across every city you track - Add any city in seconds, with smart matches for lesser-known places (search "Alaska" and Adak shows up; search "Guadalajara" and Mexico City appears, since they share a zone) - Fully customizable list — reorder or remove any city, including the ones Meridiem starts you with - A clean, calm, distraction-free design PRIVATE BY DESIGN Meridiem doesn't ask for your location, doesn't require an account, and doesn't connect to the internet at all. "You" is simply your iPhone's own time zone setting. There's no tracking, no analytics, and nothing about you ever leaves your device. Whether you're just curious what time it is in Tokyo right now, keeping up with family abroad, or coordinating with a team across three continents, Meridiem makes time zones feel simple again.
Screenshots
Verdict
The clearest difference is price: Meridiem at Free against Tempus World Clock's $1.99. Tempus World Clock's advantage is device support (3 vs 1). On ads, in-app purchases and iOS requirement 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
Meridiem is free to download; Tempus World Clock costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Tempus World Clock | Meridiem |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 10 days | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, Apple Watch — better | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 61 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Viktor Gamov | Alejandro Paez |
In-app purchases
Tempus World Clock
No in-app purchases
Meridiem
No in-app purchases








