# SkewTLogPro

> One-touch access to skew-t log-p charts for atmospheric data visualization. (iPhone/iPad app by Chad Sandstedt.)

- Source: https://appshunter.io/ios/app/skewtlogpro/id522720710 (this page in markdown: same URL + `.md`)
- Developer: [Chad Sandstedt](https://appshunter.io/developer/522720713)
- Category: Utilities, Weather
- Price: Free with in-app purchases (on sale, was $17.99)
- Rating: 2.67/5 from 97 App Store ratings · 105 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.0 · 79 MB
- Languages: English
- Released: 2012-05-03
- Data updated: 2026-06-19
- Monetization: subscription
- User reviews in markdown: https://appshunter.io/ios/app/skewtlogpro/id522720710/reviews.md

## What is SkewTLogPro?

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/

## Key features

- 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

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Annual Subscription | $12.99 | per year |


## What do users think of SkewTLogPro?

Overall sentiment: negative

**Pros**

- 📊 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
- 🎨 Clean, intuitive interface with good color choices
- 📈 Useful route planning feature for cross-country flights
- ⚡ Responsive developer with good customer support (historically)

**Cons**

- 💰 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
- 📞 Poor communication and unresponsive developer
- 🌍 Limited functionality outside CONUS (EU airport codes don't work)
- 🐌 Slow performance on iPad devices
- 📊 Limited interactivity compared to web-based alternatives
- ⏱️ Only forecasts 18 hours ahead despite GFS availability
- 🔗 No contact information available on developer website

**Commonly 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
- Graphics appear coarse and need sharpening
- Resolution doesn't refresh when zooming in

**Most 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
- 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

## Recent user reviews (10 of 105)

All indexed reviews: https://appshunter.io/ios/app/skewtlogpro/id522720710/reviews.md

### 1/5 — Paid

*2026-03-29, version 3.8*

Paid with the promise of a one time fee, but doesn’t work anymore without a yearly fee.

### 1/5 — Got bamboozled

*2026-02-12, version 3.7*

Paid for this “lifetime” app years ago now it’s locked behind a subscription paywall… at least offer people who bought the app a lifetime option vs subscription. Totally lame.

### 1/5 — Won’t live up to their policies

*2026-01-23, version 3.6*

So I bought this, actually bought it and now they’ve gone to a subscription model and won’t honor their old purchases. To me, that is reprehensible. If people get their new subscription, who’s to say they won’t change that as well? Do yourself a favor and go get another program, or just look on the web. This company isn’t your best bet

### 1/5 — Scam

*2026-01-20, version 3.6*

Paid for lifetime subscription, then they turned it off for over a year.  When it returned I need to pay again.

### 1/5 — Terrible policy change

*2026-01-16, version 3.6*

Bought the app in 2021. No subscription required. Now they locked previous users out until they purchase an annual subscription. Not part of the original agreement. Bye.

### 1/5 — Won’t honor lifetime subscription

*2025-12-06, version 3.5*

Bought this app and paid for a lifetime subscription. Now they want me to pay $13/year. Scammy.

### 1/5 — Was ok…. Now, they $$$ grab.   STAY AWAY!!!

*2025-11-23, version 3.5*

If worth while, could sue for breach of contract.  Bought ages ago under lifetime license.  Now, NOPE!!!  Stay away, junky dev.

### 1/5 — Terrible Business Practice

*2025-11-08, version 3.5*

Made a one-time purchase years ago and then they switched to a subscription model, locking me out. Do we get a refund? No. They should have at least grandfathered current users to a lifetime subscription. Do yourself a favor and switch to an app that pulls skew-T info for free, like the paragliding app Cloudbase Project.

### 1/5 — SLEEZY OWNER

*2025-11-02, version 3.5*

I Purchased this app years ago under lifetime purchase option. They  got greedy and canceled the app then re-launched the app wanting more money. 
DO NOT PURCHASE THIS APP
NO Honor 
I hope this app crashes permanently. Apple needs to shut these people down.  
I truly wish zero stars was available

### 1/5 — Rip off

*2025-09-26, version 3.4*

Paid for the app but now it is subscription based and the data is free from the US government. Shame on the author.

## Frequently asked questions about SkewTLogPro

### What does SkewTLogPro do?

SkewTLogPro provides one-touch access to powerful skew-t log-p charts. These charts offer a visual representation of temperature, dew point, and winds aloft at different altitudes, helping users analyze atmospheric conditions.

### How can I view weather charts with this app?

You can view charts using your current GPS location, by entering an airport ID code, or by providing latitude and longitude coordinates. The app also allows you to view charts along your route and touch a location on a map to see soundings.

### What is the cost of SkewTLogPro?

An annual subscription is required to access the graphs and use SkewTLogPro. The subscription costs $12.99 per year, and it can be canceled at any time.

### Is this app compatible with all devices?

The provided description does not specify device compatibility. However, it mentions an 'End User License Agreement' link typically associated with Apple devices, suggesting potential iOS compatibility.

### Who would benefit from using this app?

This app is particularly useful for aviators, glider pilots, and weather enthusiasts who require detailed atmospheric data for their activities. It helps in understanding weather patterns and making informed decisions.

## Version history (last 5 releases)

### 4.0 — 2026-06-18

-Increased Route out to 72 hours for GFS
-Added ability to view single location skew data on the map through elevation
--
-Added ability to view data directly on the graph by dragging down
-Added ability to view Airmets/Sigmets through altitude and information on each
-Added ability to view SkewT data charted through altitude with severity level colors
-Added ability to view current weather radar
-Added support for light/dark mode

### 3.9 — 2026-05-08

-Added ability to view data directly on the graph by dragging down
-Added ability to view Airmets/Sigmets through altitude and information on each
-Added ability to view SkewT data charted through altitude with severity level colors
-Added ability to view current weather radar
-Added support for light/dark mode

### 3.8 — 2026-03-27

-Fixed issue on a few Airport IDs that could pull the wrong location
-Fixed loading alerts for iPad

### 3.7 — 2026-02-11

-Support for GFS for international ICAO locations
-Support for GFS for routes

### 3.6 — 2026-01-10

-Fixed an issue where Routes did not show all locations
-Fixed issue where Route locations were not parsed correctly

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## More apps by Chad Sandstedt

- [AnalystForum](https://appshunter.io/ios/app/analystforum/id1491597794)

All apps by Chad Sandstedt: https://appshunter.io/developer/522720713

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-19.*