QuickColdAlt vs RosterSync
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
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**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.
RosterSync
Manage and share your flight schedules with airline crew. This utility automatically syncs your roster, offers robust security for login credentials, and allows real-time schedule comparison with colleagues. Export your schedule to your native calendar for seamless organization.
- Automated schedule sync
- Secure credential storage
- Real-time schedule sharing
- Cross-comparison with colleagues
- Calendar export (iCloud/Google)
- Privacy permission settings
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A New Standard for Your Flight Life, RosterSync! RosterSync is a smart utility designed for busy airline crew members to easily manage and securely share their complex flight rosters. With a sleek deep-sea theme and robust security features, we make your aviation life more comfortable and organized. [Key Features] 1. Smart Automated Schedule Sync Log in just once to your airline portal, and RosterSync will automatically parse your complex flight schedule and display it beautifully on the in-app calendar. Easily check your layovers, off days, and flight numbers at a glance. 2. Ironclad Security with Apple Keychain Your valuable airline portal login credentials (Employee ID and Password) are securely encrypted and stored ONLY within your iPhone's native 'Keychain'. They are NEVER transmitted to any external server, ensuring your absolute privacy. 3. Real-Time Schedule Sharing & Comparison Add colleagues via social login (Apple, Google) and cross-compare your schedules in real-time. Instantly see "who is flying where" and maintain your privacy with detailed search permission settings (e.g., Public, Same Airline Only, Private). 4. Calendar Export (iCloud & Google) Seamlessly export your RosterSync schedule to your native iOS Calendar or Google Calendar. For iCloud accounts, the app can automatically create a dedicated orange 'RosterSync' calendar to keep things perfectly organized! Start a smarter, more enjoyable flight life with RosterSync today!
Screenshots
Verdict
The clearest difference is in-app purchases: QuickColdAlt at none against RosterSync's 1. QuickColdAlt also leads on ads (none vs shown) and review sentiment (100% vs 80%). RosterSync's advantage is update cadence (every 3 days vs every 11 days) and ratings volume (3 vs 1). On price, rating and device support 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. RosterSync sells 1 one-off in-app purchase. QuickColdAlt asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for QuickColdAlt against 5.0 for RosterSync. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews are what separate them: 100% of QuickColdAlt's written reviews are positive against 80% of RosterSync's.
QuickColdAlt ships an update every 11 days, RosterSync every 3 days. The most recent releases landed on September 23, 2026 and October 12, 2026 respectively.
| Parameter | QuickColdAlt | RosterSync |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (3 ratings) |
| Positive reviews | 100.0% of reviews — better | 80.0% of reviews |
| Number of ratings | 1 | 3 — better |
| Update frequency | Every 11 days | Every 3 days — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Requires iOS | 16.4 — better | 18.0 |
| Further details — not scored | ||
| Size | 40 MB | 62 MB |
| Age rating | 4+ | 4+ |
| Developer | SEUNGSOO YOU | AeroSync Studio |
Customer experience
QuickColdAlt
RosterSync
In-app purchases
QuickColdAlt
No in-app purchases
RosterSync
- Pro 버전 업그레이드$2.99








