SkewTLogPro vs TwoTenDegrees
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SkewTLogPro
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.
- 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
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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/
TwoTenDegrees
This utility calculates the impossible turn, a critical maneuver for pilots in case of engine failure. It provides precise calculations to help pilots determine the safest return to the runway.
- Impossible turn calculation
- Engine failure scenario
- Runway return planning
- Pilot utility tool
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A simple to use calculator for a turn back to runway upon engine failure.
Screenshots
Verdict
The clearest difference is review sentiment: SkewTLogPro at 47% against TwoTenDegrees's 0%. SkewTLogPro also leads on ratings volume (97 vs 1). TwoTenDegrees's advantage is rating (5.0 vs 2.7) and in-app purchases (none vs 1). On price, ads, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. SkewTLogPro sells 1 in-app purchase, starting at $12.99 per year. TwoTenDegrees asks for nothing beyond the download.
TwoTenDegrees 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 complicate that: 47% of SkewTLogPro's written reviews are positive against 0% of TwoTenDegrees's, so the app with the better star average is not the one people write more warmly about.
SkewTLogPro ships an update every 2 months, TwoTenDegrees every 9 days. The most recent releases landed on September 23, 2026 and September 9, 2026 respectively.
| Parameter | SkewTLogPro | TwoTenDegrees |
|---|---|---|
| Price | Free | Free |
| Rating | 2.7 (97 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 46.7% of reviews — better | 0.0% of reviews |
| Number of ratings | 97 — better | 1 |
| Update frequency | Every 2 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Subscription | Free — better |
| Devices | iPhone, iPad | iPhone, iPad, Mac — better |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 79 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Chad Sandstedt | Scott Sloan |
Customer experience
SkewTLogPro
TwoTenDegrees
Bugs and requests
SkewTLogPro
Reported bugs
7 issues- 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
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- Graphics appear coarse and need sharpening
- Resolution doesn't refresh when zooming in
Requested features
13 requests- 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
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- 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
TwoTenDegrees
Not enough reviews yet to summarise bugs or requests.
In-app purchases
SkewTLogPro
- Annual Subscription7 Days trial$12.991 Year
TwoTenDegrees
No in-app purchases
