Lightspeed App vs QuickColdAlt
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
Read full descriptionHide 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.
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.
- 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
Read full descriptionHide 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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
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.
| Parameter | Lightspeed App | QuickColdAlt |
|---|---|---|
| Price | Free | Free |
| Rating | 3.3 (49 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 11.8% of reviews | 100.0% of reviews — better |
| Number of ratings | 49 — better | 1 |
| Update frequency | Every 6 months | Every 11 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 71 MB | 40 MB |
| Age rating | 4+ | 4+ |
| Developer | Lightspeed Aviation | SEUNGSOO YOU |
Customer experience
Lightspeed App
QuickColdAlt
In-app purchases
Lightspeed App
No in-app purchases
QuickColdAlt
No in-app purchases
Questions
Is Lightspeed App free?
Is QuickColdAlt free?
Which has better reviews, Lightspeed App or QuickColdAlt?
Do Lightspeed App or QuickColdAlt have ads?
Which is updated more often, Lightspeed App or QuickColdAlt?
Other comparisons















