Comparison

SkewTLogPro vs MMOPA

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

Head to head
About

SkewTLogPro

Access powerful skew-t log-p charts with one touch. View atmospheric data like temperature, dew point, and winds aloft at various altitudes. Supports current GPS location, airport codes, or lat/lon for detailed weather analysis.

Highlights
  • One-touch skew-t log-p chart access
  • View charts by GPS, airport ID, or lat/lon
  • Visual indication of temperature, dew point, winds aloft
  • Support for International Airport ICAO codes
  • View charts along your route
  • Save charts for offline use
  • Scroll forward/backward for past and forecast charts
Features
Read full description

SkewTLogPro gives you one-touch access to powerful skew-t log-p charts. View charts using your current GPS location, airport ID code or lat/lon. Each skew-t log-p chart provides a visual indication of temperature, dew point, winds aloft, and wind speed at various altitudes, as well as Current Radar, Airmets, Sigmets, and SkewT data charted, filtered by altitude. FEATURES: • NEW! View all Sigmet/Airmet on a map and filter by altitude • NEW! View SkewT data charted on a map with altitude filtering, shows potential warnings of Icing, Wind, and Visibility • Ability to view the lifted parcel line • Support for International Airport ICAO codes • View charts along your route using 'View Route' • Support for GFS for all locations outside the continental United States (Option in Settings) • View many values such as CAPE, LI, LCL, and many other options through settings • Save charts for offline use • View Skew T Log soundings by touching a location on a map • View skew-t log(p) charts using your current GPS location, airport identifier or latitude and longitude. • Scroll forward and backward to view past and forecast charts. • History list allows easy access to previously viewed locations. • Select how many previous and forecast hours are charted • Drag on the graph to view each point value • Double-tap to zoom in for more detail on the soundings. • Great for aviators, glider pilots and weather enthusiasts. An annual subscription is required to access these graphs and to use SkewTLogPro for $12.99 per year. Cancel anytime. Please view the End User License Agreement here: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

MMOPA

This tool helps pilots assess flight risks for specific aircraft models. By answering a questionnaire, users receive a risk score and guidance on whether to proceed with a flight, caution, or cancel. It's designed to support proactive hazard identification and better go/no-go decisions.

Highlights
  • Flight risk assessment questionnaire
  • Risk scoring and categorization (Green, Yellow, Red)
  • Risk mitigation guidance
  • Supports PA46 aircraft models
  • Proactive hazard identification
Features
Read full description

The MMOPA Flight Risk Assessment Tool (FRAT) is a tool developed by the Malibu/Mirage Owners and Pilots Association to aid the PA46 pilot community in assessing flight risks unique to the PA46 (Malibu, Matrix Mirage/M350, JetPROP, Meridian/M500, and M600 aircraft). The pilot fills out a questionnaire about their upcoming flight and the MMOPA FRAT provides a score and one of three possible ranges: Green: Lower risk. The pilot/crew should still discuss what the highest scoring risks are and attempt to mitigate those risks. Yellow: Caution. Try to mitigate some of the higher scoring items to reduce risk. If the score is still yellow, the FAA recommends the pilot bring in the opinion of a designated safety person (such as a CFI) to help think of ways to further mitigate risks or cancel the flight. Red: No-go. Unless the risks can be mitigated, the flight is cancelled. The FAA says this about FRAT’s: When implementing a Safety Management System (SMS), one of the most critical components to develop is a Flight Risk Assessment Tool (FRAT). Because every flight has some level of risk, it is critical that pilots are able to differentiate, in advance, between a low risk flight and a high-risk flight, and then establish a review process and develop risk mitigation strategies. A Flight Risk Analysis Tool enables proactive hazard identification, is easy to use, and can visually depict risk. It is an invaluable tool in helping pilots make better go/no-go decisions and should be a part of every flight. The Malibu/Mirage Owners & Pilots Association (MMOPA) is a not-for-profit organization dedicated to the interests and safety of owners and pilots worldwide who fly PA-46 derivative (Malibu, Matrix Mirage/M350, JetPROP, Meridian/M500, and M600 aircraft). MMOPA was founded in 1988, and now serves over 900 members. Membership is available to any registered or prospective owner and/or operator of qualified aircraft or any qualifying individual or organization involved with or providing a service for the PA-46 family of aircraft. MMOPA is not affiliated with the New Piper aircraft company of any other manufacturer/vendor. For information on MMOPA, please visit: http://www.mmopa.com For general information about FRAT's in general, please visit: https://www.faasafety.gov/files/gslac/library/documents/2015/Jun/103321/Introducing%20FAAST%20FRAT.pdf

Screenshots

SkewTLogPro3 screens
MMOPA3 screens

Verdict

The call

The clearest difference is rating: MMOPA at 4.5 against SkewTLogPro's 2.6. MMOPA also leads on in-app purchases (none vs 1) and review sentiment (75% vs 47%). SkewTLogPro's advantage is ratings volume (100 vs 11). 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. SkewTLogPro sells 1 in-app purchase, starting at $12.99 per year. MMOPA asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

MMOPA holds the better App Store score, 4.5 against 2.6. That said, the two scores are not equally well evidenced: SkewTLogPro has 100 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 47% of SkewTLogPro's written reviews are positive against 75% of MMOPA's.

Scorecard6 real differences · 4 level
SkewTLogPro versus MMOPA: the parameters behind the verdict, then further details
ParameterSkewTLogProMMOPA
PriceFreeFree
Rating2.6 (100 ratings)4.5 (11 ratings) — better
Positive reviews46.7% of reviews75.0% of reviews — better
Number of ratings100 — better11
Update frequencyEvery 2 months—
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscriptionFree — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.09.0 — better
Further details — not scored
Size79 MB19 MB
Age rating4+4+
DeveloperChad SandstedtInfoPogo

Customer experience

SkewTLogPro

All ratings96 ratings
Positive40.6%
Neutral4.2%
Negative55.2%
Written reviews105 reviews
Positive46.7%
Neutral2.9%
Negative50.5%

MMOPA

All ratings11 ratings
Positive90.9%
Neutral0.0%
Negative9.1%
Written reviews4 reviews
Positive75.0%
Neutral0.0%
Negative25.0%

Bugs and requests

SkewTLogPro

Reported bugs

7 issues
  • App crashes when selecting locations
  • Data timeout errors after updates
  • App becomes non-functional when data source API changes
  • Slow performance and lag when flipping through hourly forecasts on iPad
  • Crashes when manually changing parameters on iPad
Show 2 more
  • Graphics appear coarse and need sharpening
  • Resolution doesn't refresh when zooming in

Requested features

13 requests
  • Interactive charts like rucsoundings with exact value selection
  • Extended forecast range beyond 18 hours using GFS data
  • Remember last input locations for route planning
  • Display CAPE, LFC, EL, and adiabatic lines graphically on chart
  • Show weather model being used in the app
Show 8 more
  • Better orientation support for iPad use in landscape mode
  • More detailed in-app tutorial on reading Skew-T charts
  • Integration with ForeFlight for in-flight real-time data
  • Rawinsonde location map for station selection
  • Display valid times and data source station on charts
  • Expansion of coverage outside CONUS
  • Higher resolution graphics when zoomed in
  • Ability to plot current altitude and temperature like online version

MMOPA

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

SkewTLogPro

Subscriptions1
  • Annual Subscription7 Days trial$12.991 Year
None

MMOPA

No in-app purchases

Questions

Is SkewTLogPro free?
SkewTLogPro is free to download, with in-app purchases available.
Is MMOPA free?
MMOPA is free to download, with no in-app purchases.
Which has better reviews, SkewTLogPro or MMOPA?
MMOPA is rated higher. SkewTLogPro averages 2.6 out of 5 from 100 ratings, while MMOPA averages 4.5 from 11 ratings.
Do SkewTLogPro or MMOPA have ads?
Neither SkewTLogPro nor MMOPA shows ads.

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