Comparison

Timezone Converter vs Unichrono

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

Head to head
About

Timezone Converter

Easily track the local time and date for contacts worldwide. Avoid awkward calling hours by reviewing the best times to connect. Schedule meetings instantly with a Google Calendar link.

Highlights
  • Instant timezone comparison
  • People list with local time/date
  • Best time to call suggestions
  • Home screen widgets
  • One-tap Google Calendar scheduling
  • Clean, readable design
Features
Read full description

Celeste makes time zones effortless. Track the local time and date of the people who matter—so you always know when it’s a good time to call, text, or schedule. Key features # Compare time zones instantly across cities and countries # People list with local time + date (no “base city” needed) # Review Best time to call to avoid awkward hours # Home Screen widgets in multiple styles # One Tap Google Calendar link to schedule calls fast # Clean design that’s easy to read at a glance Built for real life: - Family in different countries - Long-distance relationships - Remote teams across regions Whether your partner is in Boston, family is overseas, or teammates are global — Celeste keeps everyone in sync. ## Language support: - English, French, Spanish, Arabic, Japanese, Portuguese (Brazil), and Simplified Chinese Privacy Policy: https://celeste.pebbleworklabs.com/privacy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Unichrono

Features
Read full description

It's 9 in the morning where you are. Is it too early to call your mother? Is your team in Berlin still at their desks? Will anyone in Tokyo read this tonight? And what time will it be in Lisbon when you land? Unichrono answers all three from your Home Screen, without you opening anything. PUT THEIR TIME WHERE YOU ALREADY LOOK Add the cities your people are in, then place a widget. One city, big enough to read across a room. Four cities in a row. Eight in a grid. A clock face. Your Lock Screen too, in every shape Apple allows. Every widget is yours to set up: which cities it holds, 12 or 24 hour, which theme, and what the second line says. KNOW BEFORE YOU SEND IT Each city carries the shape of its own day, so you can see it instead of working it out. A wash of colour for morning, afternoon, evening and night. Yesterday or Tomorrow when the date has already turned over there. Sunrise and sunset. And a dot for each city — green while they are inside their own working hours, amber at the edges, red when you would be waking them up. WORK OUT THE TIME BEFORE YOU GO Add the city you are flying to and it sits beside home, with the offset spelled out, so the gap is a fact rather than arithmetic you do at the gate. Drag the ruler to your landing hour and see what everyone back home will be doing when you touch down, and whether that is a reasonable time to text. Sunrise and sunset tell you what daylight you are arriving into. Once you are there, your own row moves with you and the people you left behind stay where they are. PLAN WITHOUT THE ARITHMETIC Drag the ruler along the bottom of the screen and every clock moves together, so you can find the hour that works for all of you before you propose it. Jump to a date months out and see what it looks like there. Once you have found it, set an alarm for their morning, drop the meeting into your calendar, or copy an invite that reads correctly in every zone. Unichrono can also say a city's time out loud, at an hour you pick. 6,312 cities are built in, from capitals down to small towns. Search happens on your phone; nothing is fetched. IT NEVER ASKS YOU FOR ANYTHING No account. No sign-in. No ads. No analytics. No tracking. Switch on Airplane mode and every clock in this app keeps telling the truth, because not one of them was ever asking a server. Unichrono has no backend to send your data to, because it does not need one — the time zone rules ship inside the app. WHAT IT COSTS Free, and staying free: 3 cities, the World Clock widget in every size, Hero City, Lock Screen widgets, time travel, the plan board, themes, and the full city search. Unichrono Pro is one payment of USD 2.99. It is not a subscription and never becomes one. Pro adds unlimited cities; every other widget — Two Cities, Three Cities in a day-wash or rings style, Analog, Sun Clock and Availability; the denser grid layout; extra widget detail lines, such as how long until they close; spoken city alerts; the hourly or daily time announcer; and the plan board's alarm, calendar and invite actions. Launch gift: until 31 December, all of that is free. Open the app, tap Claim, and it stays unlocked on your iPhone. No account, no subscription, nothing to renew.

Screenshots

Timezone Converter4 screens
Unichrono4 screens

Verdict

The call

The clearest difference is update cadence: Unichrono at every 5 days against Timezone Converter's monthly. Unichrono also leads on device support (4 vs 1). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Timezone Converter sells 2 in-app purchases, starting at $5.99 per month and Unichrono sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Timezone Converter ships an update monthly, Unichrono every 5 days. The most recent releases landed on October 28, 2026 and October 29, 2026 respectively.

Scorecard2 real differences · 8 level
Timezone Converter versus Unichrono: the parameters behind the verdict, then further details
ParameterTimezone ConverterUnichrono
PriceFreeFree
Rating5.0 (10 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings10 — better—
Update frequencyMonthlyEvery 5 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone, iPad, Mac, Apple Watch — better
Requires iOS17.017.0
Further details — not scored
Size7 MB34 MB
Age rating4+4+
DeveloperPebblework LabsAbhilash Emmanuel

In-app purchases

2 purchases

Timezone Converter

Subscriptions1
  • Celeste Pro (Monthly)3 Days trial$5.991 Month
One-time1
  • Celeste Pro (Lifetime)$19.99
1 purchases

Unichrono

One-time1
  • Unichrono: World Clock Widget$2.99

Questions

Is Timezone Converter free?
Timezone Converter is free to download, with in-app purchases available.
Is Unichrono free?
Unichrono is free to download, with in-app purchases available.
Do Timezone Converter or Unichrono have ads?
Neither Timezone Converter nor Unichrono shows ads.
Which is updated more often, Timezone Converter or Unichrono?
Timezone Converter ships an update monthly, and Unichrono every 5 days. Most recently, Timezone Converter was updated on October 28, 2026 and Unichrono on October 29, 2026.

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