Onboard Performance Tool vs Acron B767 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 B767 ETHOS
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Acron B767 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 L3Harris ETHOS contract training partner. Please contact your airline training department or flight school for confirmation and download instructions.
Verdict
The clearest difference is update cadence: Acron B767 ETHOS at every 6 weeks against Onboard Performance Tool's every 6 months. Acron B767 ETHOS also leads on iOS requirement (15.6 vs 17.6). On price, ads, in-app purchases and device support 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 ships an update every 6 months, Acron B767 ETHOS every 6 weeks. The most recent releases landed on October 16, 2026 and October 19, 2026 respectively.
| Parameter | Onboard Performance Tool | Acron B767 ETHOS |
|---|---|---|
| Price | Free | Free |
| Rating | 3.5 (17 ratings) — better | — |
| Positive reviews | 13.5% of reviews | — |
| Number of ratings | 17 — better | — |
| Update frequency | Every 6 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPad | iPad |
| Requires iOS | 17.6 | 15.6 — better |
| Further details — not scored | ||
| Size | 42 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | The Boeing Company | Aerosim |
In-app purchases
Onboard Performance Tool
No in-app purchases
Acron B767 ETHOS
No in-app purchases
Questions
Is Onboard Performance Tool free?
Is Acron B767 ETHOS free?
Do Onboard Performance Tool or Acron B767 ETHOS have ads?
Which is updated more often, Onboard Performance Tool or Acron B767 ETHOS?
Other comparisons
