Comparison

Tempus World Clock vs AlphaTime

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

Head to head
About

Tempus World Clock

Easily track multiple time zones with customizable clocks for cities and people. Convert times instantly, find meeting windows, and set location-specific reminders. View city details including weather and sunrise/sunset.

Highlights
  • Customizable clocks with names, emojis, and color tags
  • Instant time conversion with a draggable scrubber
  • Meeting finder with overlapping availability windows
  • Location-specific reminders
  • City detail view with weather and daylight arc
  • Profile grouping for clocks
  • Lock screen and Dynamic Island integration
Features
Currently charting
Read full description

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 A city widget shows one city drawn as its skyline, lit for the time of day, with an optional weekday and date. The World Clocks widget shows the cities you choose on the Home Screen or the Lock Screen. 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.

About

AlphaTime

Features
Read full description

AlphaTime makes it simple to see, compare, and convert time around the world. Whether you're working with international teams, staying connected with family and friends, traveling, or planning across time zones, AlphaTime puts the world's time zones into one clear, intuitive view. Free Features • View the current and chosen by you time across multiple locations • Start with four default cities: New York, London, Tokyo, and Sydney • Pick a specific hour and minutes and see the corresponding time in every city • Choose the exact 5-minute interval you need • Convert time automatically across time zones • View live analog clocks • Choose 12-hour or 24-hour time formats AlphaTime Premium Unlock the full AlphaTime experience with an optional auto-renewable subscription. Premium includes: • Add new cities • Edit saved cities • Delete cities • Reorder your city list • Choose a saved city as your Reference City to convert time from any location in the world • Use the Time Strip to select a time in your Reference City and see that same moment across all your saved cities • Control the Return to Current Time behavior Subscription AlphaTime Premium includes a 1-month free introductory offer, followed by USD $0.99/month. Subscription availability and pricing may vary by region. You can cancel at any time through Apple's subscription management. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula

Screenshots

Tempus World Clock4 screens
AlphaTime4 screens

Verdict

The call

The clearest difference is price: AlphaTime at Free against Tempus World Clock's $1.99. AlphaTime also leads on iOS requirement (15.1 vs 17.0). Tempus World Clock's advantage is in-app purchases (none vs 1) and chart position (#157 vs unranked). On 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

CostPrice · In-app purchases · Ads · Monetization

AlphaTime is free to download; Tempus World Clock costs $1.99 up front. AlphaTime sells 1 in-app purchase, starting at $0.99 per month. Tempus World Clock asks for nothing beyond the download.

UpkeepUpdate frequency

Tempus World Clock ships an update every 9 days, AlphaTime fortnightly. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 7 level
Tempus World Clock versus AlphaTime: the parameters behind the verdict, then further details
ParameterTempus World ClockAlphaTime
Price$1.99Free — better
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 9 days — betterFortnightly
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid—
Best chart rank#157 — better—
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS17.015.1 — better
Further details — not scored
Size73 MB27 MB
Age rating4+4+
DeveloperViktor GamovJEN EVANS TRUSHEVSKA

In-app purchases

None

Tempus World Clock

No in-app purchases

1 purchases

AlphaTime

Subscriptions1
  • AlphaTime Premium1 Month trial$0.991 Month

Questions

Is Tempus World Clock free?
Tempus World Clock costs $1.99, with no in-app purchases.
Is AlphaTime free?
AlphaTime is free to download, with in-app purchases available.
Do Tempus World Clock or AlphaTime have ads?
Neither Tempus World Clock nor AlphaTime shows ads.
Which is updated more often, Tempus World Clock or AlphaTime?
Tempus World Clock ships an update every 9 days, and AlphaTime fortnightly. Most recently, Tempus World Clock was updated on November 5, 2026 and AlphaTime on October 31, 2026.

Other comparisons