Simple MPG Calculator vs NAC
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Simple MPG Calculator
Easily calculate your vehicle's miles per gallon (MPG) at the gas station. This straightforward utility helps you track fuel efficiency quickly and efficiently.
- Quick MPG calculation
- User-friendly interface
- Fuel efficiency tracking
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This is a simple MPG calculator that you can use quickly while at the pump.
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: Simple MPG Calculator at none against NAC's 1. Simple MPG Calculator also leads on iOS requirement (7.0 vs 13.0). NAC's advantage is update cadence (fortnightly vs every 2 months). 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. Simple MPG Calculator asks for nothing beyond the download.
Simple MPG Calculator ships an update every 2 months, NAC fortnightly. The most recent releases landed on June 5, 2026 and September 14, 2026 respectively.
| Parameter | Simple MPG Calculator | NAC |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 7.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 1 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Shane Stambaugh | Neubert Aero Corp |
In-app purchases
Simple MPG Calculator
No in-app purchases
NAC
- U.S. Region$199.001 Year
Questions
Is Simple MPG Calculator free?
Is NAC free?
Do Simple MPG Calculator or NAC have ads?
Which is updated more often, Simple MPG Calculator or NAC?
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