# SkewTLogPro vs Virtual PAPI

The clearest difference is review sentiment: Virtual PAPI at 100% against SkewTLogPro's 47%. Virtual PAPI also leads on rating (5.0 vs 2.7) and in-app purchases (none vs 1). SkewTLogPro's advantage is ratings volume (97 vs 1). On price, ads, device support and iOS requirement there is nothing between them.

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

Virtual PAPI holds the better App Store score, 5.0 against 2.7. 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 100% of Virtual PAPI's.

SkewTLogPro ships an update every 2 months, Virtual PAPI weekly. The most recent releases landed on September 23, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | SkewTLogPro | Virtual PAPI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.7 (97 ratings)](https://appshunter.io/ios/app/skewtlogpro/id522720710/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/virtual-papi/id6755373746/reviews)** |
| Number of ratings | **97** | 1 |
| Positive reviews | 46.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Subscription | **Free** |
| Size | 79 MB | 4 MB |
| Requires iOS | **17.0** | 18.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Chad Sandstedt](https://appshunter.io/developer/522720713) | [Marlon Dutra](https://appshunter.io/developer/1853486062) |

## 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


### Virtual PAPI

[App page](https://appshunter.io/ios/app/virtual-papi/id6755373746)

This app offers adjustable visual descent guidance for any runway, allowing pilots to select airports and runways, then customize descent angles and aiming points. It provides accurate vertical guidance for various approach types and works offline with an extensive runway database.

**Highlights:** Adjustable visual descent guidance, Select airport and runway, Customize descent angle and aiming point, Accurate vertical guidance, Works offline, 30,000+ runway database

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SkewTLogPro free?

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

### Is Virtual PAPI free?

Virtual PAPI is free to download, with no in-app purchases.

### Which has better reviews, SkewTLogPro or Virtual PAPI?

Virtual PAPI is rated higher. SkewTLogPro averages 2.7 out of 5 from 97 ratings, while Virtual PAPI averages 5.0 from 1 ratings.

### Do SkewTLogPro or Virtual PAPI have ads?

Neither SkewTLogPro nor Virtual PAPI shows ads.

### Which is updated more often, SkewTLogPro or Virtual PAPI?

SkewTLogPro ships an update every 2 months, and Virtual PAPI weekly. Most recently, SkewTLogPro was updated on September 23, 2026 and Virtual PAPI on September 26, 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.*