Comparison

Simple MPG Calculator vs NAC

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Quick MPG calculation
  • User-friendly interface
  • Fuel efficiency tracking
Features
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This is a simple MPG calculator that you can use quickly while at the pump.

About

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

Simple MPG Calculator2 screens
NAC4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
Simple MPG Calculator versus NAC: the parameters behind the verdict, then further details
ParameterSimple MPG CalculatorNAC
PriceFreeFree
Rating1.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 2 monthsFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPodiPhone, iPod
Requires iOS7.0 — better13.0
Further details — not scored
Size1 MB3 MB
Age rating4+4+
DeveloperShane StambaughNeubert Aero Corp

In-app purchases

None

Simple MPG Calculator

No in-app purchases

1 purchases

NAC

Subscriptions1
  • U.S. Region$199.001 Year

Questions

Is Simple MPG Calculator free?
Simple MPG Calculator is free to download, with no in-app purchases.
Is NAC free?
NAC is free to download, with in-app purchases available.
Do Simple MPG Calculator or NAC have ads?
Neither Simple MPG Calculator nor NAC shows ads.
Which is updated more often, Simple MPG Calculator or NAC?
Simple MPG Calculator ships an update every 2 months, and NAC fortnightly. Most recently, Simple MPG Calculator was updated on June 5, 2026 and NAC on September 14, 2026.

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