# 小灵龙App vs 737 CSFF

The clearest difference is price: 小灵龙App at Free against 737 CSFF's $2.99. 小灵龙App also leads on update cadence (monthly vs every 4 months) and ratings volume (12 vs 2). 737 CSFF's advantage is rating (5.0 vs 1.0) and ads (none vs shown). On in-app purchases and device support there is nothing between them.

小灵龙App 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 holds the better App Store score, 5.0 against 1.0. That said, the two scores are not equally well evidenced: 小灵龙App has 12 ratings behind it against 2, so its average is the more settled of the two.

小灵龙App ships an update monthly, 737 CSFF every 4 months. The most recent releases landed on September 22, 2026 and August 3, 2026 respectively.

## The numbers

| Metric | 小灵龙App | 737 CSFF |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | [1.0 (12 ratings)](https://appshunter.io/ios/app/app/id1221738240/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/737-csff/id1551516212/reviews)** |
| Number of ratings | **12** | 2 |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 4 months |
| Monetization | **Free** | Paid |
| Best chart rank | — | **#197** |
| Size | 157 MB | 11 MB |
| Requires iOS | **9.0** | 17.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [北京新中新诚通信息技术股份有限公司](https://appshunter.io/developer/736575065) | [Dan O'Leary](https://appshunter.io/developer/1177083778) |

## What reviewers say

### 小灵龙App

[App page](https://appshunter.io/ios/app/app/id1221738240)

This app provides comprehensive mobile services for campus cards, including traditional card functions like consumption and authentication, enhanced with QR code capabilities. It offers features for managing your campus card, paying various campus fees, and booking campus facilities.

**Highlights:** Campus card management, QR code functionality, Campus fee payments, Facility booking, Card application and registration

**In-app purchases:** none


### 737 CSFF

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

**Currently charting:** #197 Top Paid · Utilities (US App Store)

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 小灵龙App free?

小灵龙App is free to download, with no in-app purchases.

### Is 737 CSFF free?

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

### Which has better reviews, 小灵龙App or 737 CSFF?

737 CSFF is rated higher. 小灵龙App averages 1.0 out of 5 from 12 ratings, while 737 CSFF averages 5.0 from 2 ratings.

### Do 小灵龙App or 737 CSFF have ads?

小灵龙App shows ads; 737 CSFF does not.

### Which is updated more often, 小灵龙App or 737 CSFF?

小灵龙App ships an update monthly, and 737 CSFF every 4 months. Most recently, 小灵龙App was updated on September 22, 2026 and 737 CSFF on August 3, 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.*