737 CSFF vs 737 Brake Cooling
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
737 CSFF
A visual guide to understanding Cold Soaked Fuel Frost (CSFF) on 737 aircraft wings. It references airline handbooks and Boeing FCOM guidance for educational purposes.
- Visual representation of CSFF scenarios
- Study guide for 737 wing frost
- References North American Airline Flight Handbook
- Includes Boeing FCOM guidance
- Educational tool for pilots
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This app is a study guide and a visual representation to aid in the understanding around the many scenarios when Cold Soaked Fuel Frost (CSFF) is encountered on the wing of a 737. This app is not approved for use during flight operations. The CSFF guidance in this app is designed around a North American Airline Flight Handbook and reference to the Boeing FCOM. This app is not a substitute for company flight manuals, an FAA approved deicing program, Boeing FCOM guidance or good judgement.
737 Brake Cooling
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Calculate Recommended Brake Cooling Schedule for Boeing 737-700 and Boeing 737-800. Always crosscheck with your QRH or other approved source!
Screenshots
Verdict
The clearest difference is price: 737 Brake Cooling at Free against 737 CSFF's $2.99. 737 Brake Cooling also leads on update cadence (every 8 days vs every 4 months) and iOS requirement (13.4 vs 17.6). On ads, in-app purchases 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
737 Brake Cooling is free to download; 737 CSFF costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
737 CSFF ships an update every 4 months, 737 Brake Cooling every 8 days. The most recent releases landed on November 3, 2026 and November 8, 2026 respectively.
| Parameter | 737 CSFF | 737 Brake Cooling |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 4 months | Every 8 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Requires iOS | 17.6 | 13.4 — better |
| Further details — not scored | ||
| Size | 11 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Dan O'Leary | Rene Klomp |
In-app purchases
737 CSFF
No in-app purchases
737 Brake Cooling
No in-app purchases
Questions
Is 737 CSFF free?
Is 737 Brake Cooling free?
Do 737 CSFF or 737 Brake Cooling have ads?
Which is updated more often, 737 CSFF or 737 Brake Cooling?
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