レコーダー vs 737 CSFF
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
レコーダー
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スピークバディ パーソナルコーチング用の音声録音アプリです。
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.
Screenshots
Verdict
The clearest difference is price: レコーダー at Free against 737 CSFF's $2.99. レコーダー also leads on iOS requirement (12.2 vs 17.6). 737 CSFF's advantage is update cadence (every 4 months vs every 20 months). 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
レコーダー is free to download; 737 CSFF costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
レコーダー ships an update every 20 months, 737 CSFF every 4 months. The most recent releases landed on October 26, 2026 and October 29, 2026 respectively.
| Parameter | レコーダー | 737 CSFF |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | — | 5.0 (2 ratings) — better |
| Number of ratings | — | 2 — better |
| Update frequency | Every 20 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 12.2 — better | 17.6 |
| Further details — not scored | ||
| Size | 1 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | SpeakBUDDY Ltd. | Dan O'Leary |
In-app purchases
レコーダー
No in-app purchases
737 CSFF
No in-app purchases
