# FMS 737 vs ColdTempCorr

The clearest difference is review sentiment: FMS 737 at 50% against ColdTempCorr's 0%. FMS 737 also leads on in-app purchases (none vs 2). ColdTempCorr's advantage is update cadence (every 4 months vs every 10 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. ColdTempCorr sells 2 in-app purchases, starting at $2.99 per 3 months. FMS 737 asks for nothing beyond the download.

FMS 737 ships an update every 10 months, ColdTempCorr every 4 months. The most recent releases landed on October 24, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | FMS 737 | ColdTempCorr |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (4 ratings)](https://appshunter.io/ios/app/fms-737/id1160243181/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | **50.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 4 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 28 MB | 4 MB |
| Requires iOS | 18.6 | 18.6 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [ECA Faros](https://appshunter.io/developer/1109979311) | [AeroKitPro LLC](https://appshunter.io/developer/1049063068) |

## What reviewers say

### FMS 737

[App page](https://appshunter.io/ios/app/fms-737/id1160243181)

This application provides a free-play simulation of the B737 Flight Management System. It's designed for training centers to help pilots familiarize themselves with the system before simulator sessions, offering an easy-to-use interface and comprehensive functions.

**Highlights:** B737 FMS simulation, Free play mode, Accurate simulation, Easy-to-use interface, Complete set of functions, Pilot familiarization tool

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### ColdTempCorr

[App page](https://appshunter.io/ios/app/coldtempcorr/id1639003124)

This professional aviation tool helps pilots calculate necessary cold temperature corrections for flight operations. It ensures compliance with aviation regulations by providing accurate altitude adjustments in cold weather, enhancing safety and efficiency.

**Highlights:** Cold temperature correction calculations, ICAO PANS-OPS and FAA TERPS compliance, Advanced atmospheric calculations, Constant Descent Final Approach planning, Air data conversions

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3 Months subscription | $2.99 | per 3 months |
| One year subscription | $9.99 | per year |


## Frequently asked questions

### Is FMS 737 free?

FMS 737 is free to download, with no in-app purchases.

### Is ColdTempCorr free?

ColdTempCorr is free to download, with in-app purchases available.

### Do FMS 737 or ColdTempCorr have ads?

Neither FMS 737 nor ColdTempCorr shows ads.

### Which is updated more often, FMS 737 or ColdTempCorr?

FMS 737 ships an update every 10 months, and ColdTempCorr every 4 months. Most recently, FMS 737 was updated on October 24, 2026 and ColdTempCorr on October 8, 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.*