Comparison

Zulu Time vs Lightspeed App

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

Head to head
About

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.

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
Read full description

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.

About

Lightspeed App

Enhance your flight experience with real-time CO sensor monitoring and personalized audio. Record and archive radio conversations for review and training.

Highlights
  • Real-time CO sensor tracking
  • Smart CO alerts
  • Personalized audio equalization (HearingEQity™)
  • Record radio conversations
  • Archive flight recordings
  • Draw flight diagrams
Features
Read full description

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

Zulu Time4 screens
Lightspeed App4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
Zulu Time versus Lightspeed App: the parameters behind the verdict, then further details
ParameterZulu TimeLightspeed App
Price$0.99Free — better
Rating4.8 (2.6K ratings) — better3.3 (54 ratings)
Positive reviews78.6% of reviews — better11.4% of reviews
Number of ratings2.6K — better54
Update frequencyEvery 3 months — betterEvery 6 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS17.615.0 — better
Further details — not scored
Size16 MB76 MB
Age rating4+4+
DeveloperDerek SpearsLightspeed Aviation

Customer experience

Zulu Time

All ratings2,609 ratings
Positive96.5%
Neutral1.6%
Negative1.9%
Written reviews98 reviews
Positive78.6%
Neutral10.2%
Negative11.2%

Lightspeed App

All ratings54 ratings
Positive51.9%
Neutral9.3%
Negative38.9%
Written reviews35 reviews
Positive11.4%
Neutral2.9%
Negative85.7%

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

None

Zulu Time

No in-app purchases

None

Lightspeed App

No in-app purchases

Questions

Is Zulu Time free?
Zulu Time costs $0.99, with no in-app purchases.
Is Lightspeed App free?
Lightspeed App is free to download, with no in-app purchases.
Which has better reviews, Zulu Time or Lightspeed App?
Zulu Time is rated higher. Zulu Time averages 4.8 out of 5 from 2.6K ratings, while Lightspeed App averages 3.3 from 54 ratings.
Do Zulu Time or Lightspeed App have ads?
Neither Zulu Time nor Lightspeed App shows ads.
Which is updated more often, Zulu Time or Lightspeed App?
Zulu Time ships an update every 3 months, and Lightspeed App every 6 months. Most recently, Zulu Time was updated on October 26, 2026 and Lightspeed App on October 24, 2026.

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