# Zulu Time vs Calmity

The clearest difference is price: Calmity at Free against Zulu Time's $0.99. Calmity also leads on update cadence (every 2 weeks vs every 3 months). Zulu Time's advantage is in-app purchases (none vs 2) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

Calmity is free to download; Zulu Time costs $0.99 up front. Calmity sells 2 in-app purchases, starting at $9.99 per month. Zulu Time asks for nothing beyond the download.

Zulu Time ships an update every 3 months, Calmity every 2 weeks. The most recent releases landed on November 6, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Zulu Time | Calmity |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.8 (2.6K ratings)](https://appshunter.io/ios/app/zulu-time/id377289826/reviews)** | — |
| Number of ratings | **2.6K** | — |
| Positive reviews | 78.6% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Free | — |
| Best chart rank | **#109** | — |
| Size | 16 MB | 17 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Derek Spears](https://appshunter.io/developer/377289829) | [Hatching Point LLC](https://appshunter.io/developer/1860158157) |

## What reviewers say

### Zulu Time

[App page](https://appshunter.io/ios/app/zulu-time/id377289826)

**Currently charting:** #109 Top Paid · Utilities (US App Store)

This app displays local and UTC (Zulu) time, along with multiple time zones, on your iPhone, Apple Watch, and iPad. It offers widgets for quick access and features for calculating future or past times with offsets, simplifying timezone conversions for various professions.

**Highlights:** Display local and Zulu (UTC) time, Multiple time zone display, Home and Lock Screen widgets, Apple Watch complications, Future/past time offset calculations, Time zone conversion

**Features:** Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Zulu time on command
- 🔒 Robust security features
- 👍 Easy to read and use
- 👍 Excellent for aviation and radio operators
- 👍 Customizable and syncs correctly

**What reviewers complain about**

- 🐛 Watch complication not updating consistently
- 🐛 Local time not displaying correctly on widget
- 🐛 Complication shows only hours, not full time
- 🐛 Difficulty setting with Daylight Saving Time

**Reported bugs**

- Complication freezes after a few days
- Zulu time loses accuracy over time on Apple Watch
- Widget not updating local time properly

**Requested features**

- Add alarm feature
- Allow landscape mode for bedside clock view
- Provide option for always-on display
- Add time zone map for quick reference
- Show day of year in display


### Calmity

[App page](https://appshunter.io/ios/app/calmity/id6759583328)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $9.99 | per month |
| Yearly Premium | $59.99 | per year |


## Frequently asked questions

### Is Zulu Time free?

Zulu Time costs $0.99, with no in-app purchases.

### Is Calmity free?

Calmity is free to download, with in-app purchases available.

### Do Zulu Time or Calmity have ads?

Calmity shows ads; Zulu Time does not.

### Which is updated more often, Zulu Time or Calmity?

Zulu Time ships an update every 3 months, and Calmity every 2 weeks. Most recently, Zulu Time was updated on November 6, 2026 and Calmity on October 25, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*