# SkewTLogPro vs WingCalc

The clearest difference is rating: SkewTLogPro at 2.7 against WingCalc's 2.0. SkewTLogPro also leads on ratings volume (97 vs 1) and review sentiment (47% vs 33%). WingCalc's advantage is monetization model (free with in-app purchases vs subscription) and update cadence (weekly vs every 2 months). On price, ads, in-app purchases 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 and WingCalc sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

SkewTLogPro holds the better App Store score, 2.7 against 2.0. That said, the two scores are not equally well evidenced: SkewTLogPro has 97 ratings behind it against 1, 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 33% of WingCalc's.

SkewTLogPro ships an update every 2 months, WingCalc weekly. The most recent releases landed on September 23, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | SkewTLogPro | WingCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.7 (97 ratings)](https://appshunter.io/ios/app/skewtlogpro/id522720710/reviews)** | [2.0 (1 ratings)](https://appshunter.io/ios/app/wingcalc/id1550632188/reviews) |
| Number of ratings | **97** | 1 |
| Positive reviews | **46.7% of reviews** | 33.3% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 79 MB | 7 MB |
| Requires iOS | **17.0** | 18.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Chad Sandstedt](https://appshunter.io/developer/522720713) | [App4Life Sweden AB](https://appshunter.io/developer/507125048) |

## 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


### WingCalc

[App page](https://appshunter.io/ios/app/wingcalc/id1550632188)

This aviation calculator provides essential flight calculations for pilots, from preflight planning to in-flight decisions. It offers instant results for density altitude, runway wind components, and navigation planning, with a dashboard for all flight parameters.

**Highlights:** Density altitude and pressure altitude calculations, Runway wind component determination, Navigation planning with wind correction, Flight parameters dashboard, Live GPS with real-time coordinates, Automatic magnetic variation detection

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WingCalc Pro | $0.99 | one-time |


## Frequently asked questions

### Is SkewTLogPro free?

SkewTLogPro is free to download, with in-app purchases available.

### Is WingCalc free?

WingCalc is free to download, with in-app purchases available.

### Which has better reviews, SkewTLogPro or WingCalc?

SkewTLogPro is rated higher. SkewTLogPro averages 2.7 out of 5 from 97 ratings, while WingCalc averages 2.0 from 1 ratings.

### Do SkewTLogPro or WingCalc have ads?

Neither SkewTLogPro nor WingCalc shows ads.

### Which is updated more often, SkewTLogPro or WingCalc?

SkewTLogPro ships an update every 2 months, and WingCalc weekly. Most recently, SkewTLogPro was updated on September 23, 2026 and WingCalc on June 1, 2026.

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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.*