# B737 Alerts vs Chart Guide Pro

The clearest difference is rating: B737 Alerts at 4.3 against Chart Guide Pro's 1.0. B737 Alerts also leads on update cadence (every 5 months vs every 21 months) and ratings volume (9 vs 1). Chart Guide Pro's advantage is price ($5.99 vs $9.99). On ads, in-app purchases, monetization model and device support there is nothing between them.

B737 Alerts costs $9.99 and Chart Guide Pro $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

B737 Alerts holds the better App Store score, 4.3 against 1.0. That said, the two scores are not equally well evidenced: B737 Alerts has 9 ratings behind it against 1, so its average is the more settled of the two.

B737 Alerts ships an update every 5 months, Chart Guide Pro every 21 months. The most recent releases landed on October 26, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | B737 Alerts | Chart Guide Pro |
| --- | --- | --- |
| Price | $9.99 | **$5.99** |
| Rating | **[4.3 (9 ratings)](https://appshunter.io/ios/app/b737-alerts/id453260249/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/chart-guide-pro/id1629309777/reviews) |
| Number of ratings | **9** | 1 |
| Positive reviews | 37.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 21 months |
| Monetization | Paid | Paid |
| Size | 54 MB | 21 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [fss.aero](https://appshunter.io/developer/446805306) | [Gadir Mamedov](https://appshunter.io/developer/1628780398) |

## What reviewers say

### B737 Alerts

[App page](https://appshunter.io/ios/app/b737-alerts/id453260249)

A comprehensive reference guide for Boeing 737 error messages, covering PFD/ND, FMC, and panel module issues. It provides detailed descriptions, corrective actions, and cross-links to procedures for pilots and maintenance personnel.

**Highlights:** Covers 737-600, -700, -800, -900, and BBJ series errors, Details PFD/ND, FMC, and panel module errors, Includes nearly 400 errors, Cross-links annunciations to QRH procedures, Provides error descriptions and corrective actions, Classifies messages by system and ATA chapter

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

**In-app purchases:** none


### Chart Guide Pro

[App page](https://appshunter.io/ios/app/chart-guide-pro/id1629309777)

Learn to interpret aeronautical charts with this intuitive guide. It simplifies complex aviation mapping information for pilots and enthusiasts.

**Highlights:** Understand aeronautical charts, Simplify aviation mapping, Pilot-friendly interface, Learn chart interpretation

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is B737 Alerts free?

B737 Alerts costs $9.99, with no in-app purchases.

### Is Chart Guide Pro free?

Chart Guide Pro costs $5.99, with no in-app purchases.

### Which has better reviews, B737 Alerts or Chart Guide Pro?

B737 Alerts is rated higher. B737 Alerts averages 4.3 out of 5 from 9 ratings, while Chart Guide Pro averages 1.0 from 1 ratings.

### Do B737 Alerts or Chart Guide Pro have ads?

Neither B737 Alerts nor Chart Guide Pro shows ads.

### Which is updated more often, B737 Alerts or Chart Guide Pro?

B737 Alerts ships an update every 5 months, and Chart Guide Pro every 21 months. Most recently, B737 Alerts was updated on October 26, 2026 and Chart Guide Pro on October 7, 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.*