# Zulu Time vs PhaseChecker

The clearest difference is review sentiment: Zulu Time at 79% against PhaseChecker's 16%. Zulu Time also leads on rating (4.8 vs 2.0) and monetization model (free vs paid). PhaseChecker's advantage is iOS requirement (14.1 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

Zulu Time costs $0.99 and PhaseChecker $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Zulu Time holds the better App Store score, 4.8 against 2.0. That said, the two scores are not equally well evidenced: Zulu Time has 2.6K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 79% of Zulu Time's written reviews are positive against 16% of PhaseChecker's.

Zulu Time ships an update every 3 months, PhaseChecker every 43 months. The most recent releases landed on September 24, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Zulu Time | PhaseChecker |
| --- | --- | --- |
| Price | $0.99 | $0.99 |
| Rating | **[4.8 (2.6K ratings)](https://appshunter.io/ios/app/zulu-time/id377289826/reviews)** | [2.0 (3 ratings)](https://appshunter.io/ios/app/phasechecker/id1160400348/reviews) |
| Number of ratings | **2.6K** | 3 |
| Positive reviews | **78.6% of reviews** | 15.8% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 43 months |
| Monetization | **Free** | Paid |
| Best chart rank | **#132** | — |
| Size | 16 MB | 1 MB |
| Requires iOS | 17.6 | **14.1** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Derek Spears](https://appshunter.io/developer/377289829) | [Rick Peacock](https://appshunter.io/developer/286052385) |

## What reviewers say

### Zulu Time

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

**Currently charting:** #132 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


### PhaseChecker

[App page](https://appshunter.io/ios/app/phasechecker/id1160400348)

This utility app tests your sound system to ensure speakers are correctly wired and in-phase. It offers manual and automatic modes, with advanced waveform analysis for precise setup. Proper phasing is crucial for optimal bass response and stereo imaging.

**Highlights:** Speaker phase and polarity testing, Manual and automatic test modes, Microphone-based analysis, Waveform view for advanced users, In-app help and guidance, Audio output connection

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

**In-app purchases:** none


## Frequently asked questions

### Is Zulu Time free?

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

### Is PhaseChecker free?

PhaseChecker costs $0.99, with no in-app purchases.

### Which has better reviews, Zulu Time or PhaseChecker?

Zulu Time is rated higher. Zulu Time averages 4.8 out of 5 from 2.6K ratings, while PhaseChecker averages 2.0 from 3 ratings.

### Do Zulu Time or PhaseChecker have ads?

Neither Zulu Time nor PhaseChecker shows ads.

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

Zulu Time ships an update every 3 months, and PhaseChecker every 43 months. Most recently, Zulu Time was updated on September 24, 2026 and PhaseChecker on September 17, 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.*