# SkewTLogPro vs MMOPA

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.

Both are free to download. SkewTLogPro sells 1 in-app purchase, starting at $12.99 per year. MMOPA asks for nothing beyond the download.

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.

## The numbers

| Metric | SkewTLogPro | MMOPA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.6 (100 ratings)](https://appshunter.io/ios/app/skewtlogpro/id522720710/reviews) | **[4.5 (11 ratings)](https://appshunter.io/ios/app/mmopa-frat/id1206155543/reviews)** |
| Number of ratings | **100** | 11 |
| Positive reviews | 46.7% of reviews | **75.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Subscription | **Free** |
| Size | 79 MB | 19 MB |
| Requires iOS | 17.0 | **9.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Chad Sandstedt](https://appshunter.io/developer/522720713) | [InfoPogo](https://appshunter.io/developer/967338109) |

## What reviewers say

### SkewTLogPro

[App page](https://appshunter.io/ios/app/skewtlogpro/id522720710)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Annual Subscription | $12.99 | per year |

**What reviewers like**

- 📊 Excellent tool for flight planning and weather analysis
- ☁️ Accurate cloud top and bottom predictions
- ❄️ Helpful for identifying icing conditions and freezing levels
- 🎯 Comprehensive atmospheric information in one app
- 👨‍✈️ Essential resource for pilots and weather enthusiasts

**What reviewers complain about**

- 💰 Sudden switch to subscription model for existing paid users
- 🚫 No grandfathering or refunds for previous purchasers
- ⏸️ Extended downtime when data source became unavailable
- 📵 App becomes completely non-functional without subscription
- 💸 High annual subscription fee ($13/year) relative to competitors

**Reported bugs**

- 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

**Requested features**

- 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


### MMOPA

[App page](https://appshunter.io/ios/app/mmopa-frat/id1206155543)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*