# SkewTLogPro vs SF50 TOLD

The clearest difference is rating: SF50 TOLD at 4.0 against SkewTLogPro's 2.7. SF50 TOLD also leads on in-app purchases (none vs 1) and update cadence (fortnightly vs every 2 months). SkewTLogPro's advantage is ratings volume (97 vs 4) and iOS requirement (17.0 vs 26.0). On price, review sentiment, 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. SF50 TOLD asks for nothing beyond the download.

SF50 TOLD holds the better App Store score, 4.0 against 2.7. That said, the two scores are not equally well evidenced: SkewTLogPro has 97 ratings behind it against 4, 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 50% of SF50 TOLD's.

SkewTLogPro ships an update every 2 months, SF50 TOLD fortnightly. The most recent releases landed on September 23, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | SkewTLogPro | SF50 TOLD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.7 (97 ratings)](https://appshunter.io/ios/app/skewtlogpro/id522720710/reviews) | **[4.0 (4 ratings)](https://appshunter.io/ios/app/sf50-told/id1552835232/reviews)** |
| Number of ratings | **97** | 4 |
| Positive reviews | 46.7% of reviews | **50.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | Subscription | **Free** |
| Size | 79 MB | 25 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Chad Sandstedt](https://appshunter.io/developer/522720713) | [Timothy Morgan](https://appshunter.io/developer/788467418) |

## 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


### SF50 TOLD

[App page](https://appshunter.io/ios/app/sf50-told/id1552835232)

This app assists Cirrus SF50 Vision pilots with performance calculations for takeoff and landing. It provides runway requirements based on entered weights, supporting various weather conditions and custom safety factors.

**Highlights:** Performance calculations for takeoff and landing, Input for weights and runway requirements, Automatic and manual weather entry, Custom safety factors, Support for non-normal configurations, Runway contamination data

**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 SF50 TOLD free?

SF50 TOLD is free to download, with no in-app purchases.

### Which has better reviews, SkewTLogPro or SF50 TOLD?

SF50 TOLD is rated higher. SkewTLogPro averages 2.7 out of 5 from 97 ratings, while SF50 TOLD averages 4.0 from 4 ratings.

### Do SkewTLogPro or SF50 TOLD have ads?

Neither SkewTLogPro nor SF50 TOLD shows ads.

### Which is updated more often, SkewTLogPro or SF50 TOLD?

SkewTLogPro ships an update every 2 months, and SF50 TOLD fortnightly. Most recently, SkewTLogPro was updated on September 23, 2026 and SF50 TOLD on September 16, 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.*