Zulu Time vs Lightspeed App
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Zulu Time
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.
- 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
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An iPhone, Apple Watch and iPad app to see Local and Zulu time (GMT) or multiple time zones in a single glance. Includes Widgets for both the iPhone and Apple Watch. Useful for pilots in getting weather briefings and filing flight plans, or Ham radio operators to do timezone conversions. No more worrying about getting the timezone offset correct or Daylight Savings Time conversions. Easily convert from different time zones, including times in the future or past. On the iPhone: - Home and Lock Screen widgets - The Zulu Time page gives a quick view of both Zulu and Local times - The Offset Time page allows you to see Zulu and local time either in the future or past by entering an offset via the Offset button. Tapping either Zulu or Local times will allow you to enter a time in the future or past, synchronizing both Local and Zulu times with that offset. The offset only applies to this view (except on the iPad the offset applies to everything on the page) - The Multiple Zones page allows you to add as many time zones as you wish in a scrolling view. Clicking on any Time Zone will allow you to change it. on iPad: All information is combined on one screen. You have user customizable time zones on the right hand side. On the left, you have Zulu and Local time and one customizable time zone. The offset to see future or past time can be done via the Offset button or tapping any of either the Zulu, Local or Custom time buttons on the left. On the Watch: Complications available in all watch faces making for glanceable ZuluTime and access to the app, which gives offset able time computation.
Lightspeed App
Enhance your flight experience with real-time CO sensor monitoring and personalized audio. Record and archive radio conversations for review and training.
- Real-time CO sensor tracking
- Smart CO alerts
- Personalized audio equalization (HearingEQity™)
- Record radio conversations
- Archive flight recordings
- Draw flight diagrams
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A companion app to the Lightspeed Delta Zulu ANR headset, the Lightspeed app for iOS features an array of integrated features to keep pilots and passengers safer during flight. Track CO Sensors for Safer Flying The Lightspeed app allows pilots to check the CO levels in the aircraft during flight, using a CO sensor built right into the Lightspeed Delta Zulu headset. The sensor provides real-time smart alerts via the proprietary Kanari™ smart alert technology. Historical data can be stored, reviewed, and analyzed after use and during the flight(s). Personalize Audio with HearingEQity™ The Lightspeed app introduces a built-in audio equalization system called HearingEQity™ designed to compensate for individual hearing loss. Through an automated 12-frequency hearing test taken through the app, HearingEQity sets the hearing level in each ear in a variety of frequency bands of the Lightspeed Delta Zulu headset to create an individual hearing profile and compensate for any hearing variations between ears. Record Conversations, Archive Flight Recordings, and More... The Lightspeed App allows pilots to record radio conversations, playback transmissions, draw diagrams, and archive flight recordings for post-flight briefings and training.
Screenshots
Verdict
The clearest difference is review sentiment: Zulu Time at 79% against Lightspeed App's 11%. Zulu Time also leads on rating (4.8 vs 3.3) and ratings volume (2.6K vs 54). Lightspeed App's advantage is price (Free vs $0.99) and iOS requirement (15.0 vs 17.6). On update cadence, ads, in-app purchases and monetization model 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
Lightspeed App is free to download; Zulu Time costs $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 3.3. That said, the two scores are not equally well evidenced: Zulu Time has 2.6K ratings behind it against 54, 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 11% of Lightspeed App's.
Zulu Time ships an update every 3 months, Lightspeed App every 6 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.
| Parameter | Zulu Time | Lightspeed App |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.8 (2.6K ratings) — better | 3.3 (54 ratings) |
| Positive reviews | 78.6% of reviews — better | 11.4% of reviews |
| Number of ratings | 2.6K — better | 54 |
| Update frequency | Every 3 months — better | Every 6 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 17.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 16 MB | 76 MB |
| Age rating | 4+ | 4+ |
| Developer | Derek Spears | Lightspeed Aviation |
Customer experience
Zulu Time
Lightspeed App
Bugs and requests
Zulu Time
Reported bugs
3 issues- Complication freezes after a few days
- Zulu time loses accuracy over time on Apple Watch
- Widget not updating local time properly
Requested features
5 requests- 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
Lightspeed App
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Zulu Time
No in-app purchases
Lightspeed App
No in-app purchases









