KEANS Alerts vs NAC
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KEANS Alerts
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The KEANS Alert app is an emergency alert notification system for airports. Using this app, The Air Traffic Controller (ATC) can issue alerts to the ground staff teams and emergency teams based on the information they receive from the pilots. Whenever the Air Traffic Controller ATC raises an alert, the ground staff teams and emergency teams can see the important details of the flight and emergency/alert along with audio and its transcript on their user-friendly interface. With the help of this app, ground staff and emergency teams are quickly notified in the event of an emergency or alert, enabling them to be ready with all the supplies and tools before the flight lands. This app helps airports by reducing risk in the event of emergencies and/or alerts.
NAC
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Terms of Service: https://airportnac.com/terms-and-conditions/ EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ NAC-Dynamic Friction Decelerometer (NAC-DFD®) The NAC-DFD® is an electronic friction testing device designed for airport runways. This 3-axis mobile iOS™ application enables airport operators to "spot-check" contaminated surfaces during winter runway operations. Key Features: Accurate Measurements: Records vehicle braking values by measuring the "g" force or lock-wheel braking action during qualified tests. Automated Reporting: Automatically generates final reports segmented into runway thirds: "touchdown," "midfield," and "rollout." Comprehensive Data Recording: Captures all necessary data, including time, date, operator, and assigned user ID. Versatile Contaminant Selection: Allows operators to choose from 14 different contaminant types for reporting runway conditions during winter operations. Easy Data Export: Supports exporting results using the standard print function. Additional Information: The NAC-DFD® assists airport operators in assessing the effectiveness of friction-enhancing treatments by indicating trends in runway friction levels. It is approved by the Federal Aviation Administration, as listed in Advisory Circular 150/5200-30C, Appendix 3. Note: For continued testing, a subscription is required.
Screenshots
Verdict
The clearest difference is in-app purchases: KEANS Alerts at none against NAC's 1. NAC's advantage is update cadence (fortnightly vs every 3 months) and iOS requirement (13.0 vs 15.6). On price, ads 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. NAC sells 1 in-app purchase, starting at $199.00 per year. KEANS Alerts asks for nothing beyond the download.
KEANS Alerts ships an update every 3 months, NAC fortnightly. The most recent releases landed on September 5, 2026 and September 14, 2026 respectively.
| Parameter | KEANS Alerts | NAC |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 20 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | KOVA Corp. | Neubert Aero Corp |
In-app purchases
KEANS Alerts
No in-app purchases
NAC
- U.S. Region$199.001 Year









