# CrewAlert vs Onboard Performance Tool

The clearest difference is rating: CrewAlert at 4.0 against Onboard Performance Tool's 3.5. CrewAlert also leads on update cadence (every 2 months vs every 6 months) and review sentiment (25% vs 14%). Onboard Performance Tool's advantage is in-app purchases (none vs 2) and ratings volume (17 vs 2). On price and ads there is nothing between them.

Both are free to download. CrewAlert sells 2 in-app purchases, starting at $1.99 per month. Onboard Performance Tool asks for nothing beyond the download.

CrewAlert holds the better App Store score, 4.0 against 3.5. That said, the two scores are not equally well evidenced: Onboard Performance Tool has 17 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 25% of CrewAlert's written reviews are positive against 14% of Onboard Performance Tool's.

CrewAlert ships an update every 2 months, Onboard Performance Tool every 6 months. The most recent releases landed on August 30, 2026 and July 1, 2026 respectively.

## The numbers

| Metric | CrewAlert | Onboard Performance Tool |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (2 ratings)](https://appshunter.io/ios/app/crewalert/id391351389/reviews)** | [3.5 (17 ratings)](https://appshunter.io/ios/app/onboard-performance-tool/id584211407/reviews) |
| Number of ratings | 2 | **17** |
| Positive reviews | **25.0% of reviews** | 13.5% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 6 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 34 MB | 42 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jeppesen Systems AB](https://appshunter.io/developer/391351392) | [The Boeing Company](https://appshunter.io/developer/493615170) |

## What reviewers say

### CrewAlert

[App page](https://appshunter.io/ios/app/crewalert/id391351389)

This app helps airline professionals and crew manage fatigue risk by predicting and analyzing alertness levels. It offers tools for proactive and reactive fatigue reporting, risk reduction, and data collection, built on a scientific alertness model.

**Highlights:** Predictive fatigue analysis, Proactive fatigue data collection, Simplified fatigue reporting, Context-sensitive fatigue mitigation, Alertness prediction model, Sleep diary and data collection, What-if scenario planning

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CrewAlert (1 Month) | $1.99 | per month |
| CrewAlert Yearly (12 months) | $19.99 | per year |


### Onboard Performance Tool

[App page](https://appshunter.io/ios/app/onboard-performance-tool/id584211407)

This application enables flight crews and ground personnel to perform real-time performance calculations for flights. It provides fast and precise data for takeoff, landing, and weight and balance, accounting for various environmental and operational factors.

**Highlights:** Real-time performance calculations, Takeoff analysis, Landing analysis, Weight and balance information, Accounts for weather and runway conditions, Corrects for pressure variation and MEL items

**In-app purchases:** none


## Frequently asked questions

### Is CrewAlert free?

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

### Is Onboard Performance Tool free?

Onboard Performance Tool is free to download, with no in-app purchases.

### Which has better reviews, CrewAlert or Onboard Performance Tool?

CrewAlert is rated higher. CrewAlert averages 4.0 out of 5 from 2 ratings, while Onboard Performance Tool averages 3.5 from 17 ratings.

### Do CrewAlert or Onboard Performance Tool have ads?

Neither CrewAlert nor Onboard Performance Tool shows ads.

### Which is updated more often, CrewAlert or Onboard Performance Tool?

CrewAlert ships an update every 2 months, and Onboard Performance Tool every 6 months. Most recently, CrewAlert was updated on August 30, 2026 and Onboard Performance Tool on July 1, 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.*