Comparison

Lightspeed App vs QuickColdAlt

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

Head to head
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.

About

QuickColdAlt

This utility calculates temperature and altitude corrections for flight operations. It offers a user-friendly interface for quick and reliable results, with a dark mode ideal for night flying. The app is completely free and ad-free.

Highlights
  • Temperature and altitude correction calculation
  • User-friendly interface
  • Fast results (under 10 seconds)
  • Clear and reliable display
  • Dark mode for night flights
  • Completely free and ad-free
Features
Read full description

**QuickColdAlt: The ultimate Cold Temperature Altitude Correction Calculator designed by an Airline Pilot.** - **Fast and Easy:** Calculate corrections in under 10 seconds with a simple and user-friendly interface. - **Clear and Reliable:** Accurate results are clearly displayed for your confidence. - **Perfect for Night Flights:** The default dark mode reduces eye strain, making it ideal for night operations. - **Always Free:** No cost, no ads—use it anytime, anywhere with peace of mind. With **QuickColdAlt**, save time, fly safer, and simplify your workflow. Download now and experience the difference! ( The airport data provided within the app serves as reference data only. If needed, it is recommended to manually input the desired airport elevation value. ) Visit our official website for more information : www.redswansoft.com App Credits & Licenses This app integrates various libraries and resources to deliver its features efficiently. The following libraries and resources are used: • mwgg/Airports: A JSON database of airports, provided under the MIT License. • Ionicons: Icons provided under the MIT License. • FontAwesome: Free icons provided under the Font Awesome Free License. • Google Fonts: Fonts provided under the Open Font License (OFL). Licenses This app complies with the licensing requirements of each resource. For example: • MIT License Permission is hereby granted, free of charge, to any person obtaining a copy of the software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. The software is provided “as is”, without warranty of any kind. • Open Font License (OFL) The fonts used in this app are free to use and distribute as long as they are not sold by themselves. Acknowledgment We deeply appreciate the creators and maintainers of these open-source libraries for enabling us to build a better app experience.

Screenshots

Lightspeed App4 screens
QuickColdAlt4 screens

Verdict

The call

The clearest difference is review sentiment: QuickColdAlt at 100% against Lightspeed App's 12%. QuickColdAlt also leads on rating (5.0 vs 3.3) and update cadence (every 11 days vs every 6 months). Lightspeed App's advantage is ratings volume (49 vs 1) and iOS requirement (13.0 vs 16.4). On price, 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

QuickColdAlt holds the better App Store score, 5.0 against 3.3. That said, the two scores are not equally well evidenced: Lightspeed App has 49 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 12% of Lightspeed App's written reviews are positive against 100% of QuickColdAlt's.

UpkeepUpdate frequency

Lightspeed App ships an update every 6 months, QuickColdAlt every 11 days. The most recent releases landed on September 7, 2026 and August 1, 2026 respectively.

Scorecard5 real differences · 5 level
Lightspeed App versus QuickColdAlt: the parameters behind the verdict, then further details
ParameterLightspeed AppQuickColdAlt
PriceFreeFree
Rating3.3 (49 ratings)5.0 (1 ratings) — better
Positive reviews11.8% of reviews100.0% of reviews — better
Number of ratings49 — better1
Update frequencyEvery 6 monthsEvery 11 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better16.4
Further details — not scored
Size71 MB40 MB
Age rating4+4+
DeveloperLightspeed AviationSEUNGSOO YOU

Customer experience

Lightspeed App

All ratings49 ratings
Positive51.0%
Neutral8.2%
Negative40.8%
Written reviews34 reviews
Positive11.8%
Neutral2.9%
Negative85.3%

QuickColdAlt

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Lightspeed App

No in-app purchases

None

QuickColdAlt

No in-app purchases

Questions

Is Lightspeed App free?
Lightspeed App is free to download, with no in-app purchases.
Is QuickColdAlt free?
QuickColdAlt is free to download, with no in-app purchases.
Which has better reviews, Lightspeed App or QuickColdAlt?
QuickColdAlt is rated higher. Lightspeed App averages 3.3 out of 5 from 49 ratings, while QuickColdAlt averages 5.0 from 1 ratings.
Do Lightspeed App or QuickColdAlt have ads?
Neither Lightspeed App nor QuickColdAlt shows ads.
Which is updated more often, Lightspeed App or QuickColdAlt?
Lightspeed App ships an update every 6 months, and QuickColdAlt every 11 days. Most recently, Lightspeed App was updated on September 7, 2026 and QuickColdAlt on August 1, 2026.

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