# レコーダー vs 737 CSFF

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.

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.

## The numbers

| Metric | レコーダー | 737 CSFF |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/737-csff/id1551516212/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | **Every 4 months** |
| Monetization | — | Paid |
| Size | 1 MB | 11 MB |
| Requires iOS | **12.2** | 17.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [SpeakBUDDY Ltd.](https://appshunter.io/developer/633270154) | [Dan O'Leary](https://appshunter.io/developer/1177083778) |

## What reviewers say

### レコーダー

[App page](https://appshunter.io/ios/app/id1469874020)

**Features:** macOS Compatibility

**In-app purchases:** none


### 737 CSFF

[App page](https://appshunter.io/ios/app/737-csff/id1551516212)

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.

**Highlights:** 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

**In-app purchases:** none


## Frequently asked questions

### Is レコーダー free?

レコーダー is free to download, with no in-app purchases.

### Is 737 CSFF free?

737 CSFF costs $2.99, with no in-app purchases.

### Do レコーダー or 737 CSFF have ads?

Neither レコーダー nor 737 CSFF shows ads.

### Which is updated more often, レコーダー or 737 CSFF?

レコーダー ships an update every 20 months, and 737 CSFF every 4 months. Most recently, レコーダー was updated on October 26, 2026 and 737 CSFF on October 29, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*