Onboard Performance Tool vs Acron B737NG ETHOS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Onboard Performance Tool
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.
- 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
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*** This application requires configuration files, performance and other databases, available separately. Contact your Boeing representative for details. *** The Onboard Performance Tool (OPT) permits flight crews and ground personnel to perform real-time calculations based on current weather and runway conditions, while adhering to company and regulatory policies and procedures. The Onboard Performance Tool provides self-planning capability through fast and precise calculations. It allows flight crews to calculate the takeoff analysis, landing analysis, and weight and balance information. Instant and accurate calculations save time by correcting for pressure variation, runway conditions, engine bleeds and Minimum Equipment List (MEL) items.
Acron B737NG ETHOS
This application serves as a Flight Management System Trainer for aviation professionals. It enables users to run courseware or freeplay simulations, requiring an account from an affiliated Acron ETHOS training partner.
- Flight Management System Trainer
- Courseware simulation
- Freeplay simulation
- Aviation industry focus
- Requires user account
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Acron B737NG ETHOS app allows users to run courseware or freeplay Flight Management System Trainer (FMST). It is designed for aviation industry. This app requires a user account given to end-users currently affiliated with Acron ETHOS contract training partner. Please contact your airline training department or flight school for confirmation and download instructions.
Verdict
The clearest difference is rating: Onboard Performance Tool at 3.5 against Acron B737NG ETHOS's 3.0. Onboard Performance Tool also leads on ratings volume (17 vs 2). Acron B737NG ETHOS's advantage is iOS requirement (15.6 vs 17.6). On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Onboard Performance Tool holds the better App Store score, 3.5 against 3.0. 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.
Both ship on a similar rhythm, roughly every 6 months. Both last shipped on October 24, 2026.
| Parameter | Onboard Performance Tool | Acron B737NG ETHOS |
|---|---|---|
| Price | Free | Free |
| Rating | 3.5 (17 ratings) — better | 3.0 (2 ratings) |
| Positive reviews | 13.5% of reviews | — |
| Number of ratings | 17 — better | 2 |
| Update frequency | Every 6 months | Every 6 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPad | iPad |
| Requires iOS | 17.6 | 15.6 — better |
| Further details — not scored | ||
| Size | 42 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | The Boeing Company | Aerosim |
Customer experience
Onboard Performance Tool
Acron B737NG ETHOS
In-app purchases
Onboard Performance Tool
No in-app purchases
Acron B737NG ETHOS
No in-app purchases
Questions
Is Onboard Performance Tool free?
Is Acron B737NG ETHOS free?
Which has better reviews, Onboard Performance Tool or Acron B737NG ETHOS?
Do Onboard Performance Tool or Acron B737NG ETHOS have ads?
Which is updated more often, Onboard Performance Tool or Acron B737NG ETHOS?
Other comparisons
