Comparison

SkewTLogPro vs ACE Checklist Editor

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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
Read full description

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/

About

ACE Checklist Editor

Create, manage, and execute aviation checklists digitally. Designed for pilots, it offers offline functionality, professional templates, and multi-format import/export for enhanced safety and efficiency in the cockpit.

Highlights
  • Digital aviation checklist creation
  • Offline functionality
  • Multi-format import/export (ACE, ForeFlight, Dynon)
  • Professional templates
  • Challenge & Response format
  • Revision history
  • Smart organization by aircraft or phase of flight
Features
Read full description

Transform Your Aviation Safety with Professional Digital Checklists ACE Checklist Editor is the professional pilot's choice for creating, managing, and executing aviation checklists on your iPhone, iPad, and Mac. Designed by pilots for pilots, ACE brings the reliability of paper checklists into the digital age with powerful features that enhance safety and efficiency. WHY PILOTS CHOOSE ACE • Universal Compatibility - Import and export checklists in ACE (.ace), ForeFlight (.fmd), and Dynon formats • Industry-Standard ACE Format - Compatible with Garmin avionics and other systems that support ACE files • Works Offline - All your checklists are stored locally on your device. No internet required in flight • Professional Templates - Start with expertly crafted templates for popular aircraft or create your own from scratch • External Drive Sync - Keep your checklists synchronized across devices using external drives • Smart Organization - Group checklists by aircraft, phase of flight, or custom categories SAFETY-FIRST DESIGN • Challenge & Response Format - Clear distinction between checklist items and expected responses • Emergency Procedures - Quick access to critical checklists with high-visibility formatting • Warning & Caution Items - Color-coded alerts for critical items that demand attention • Revision History - Track all changes with complete version control • No Distractions - Clean, focused interface designed for cockpit use POWERFUL FEATURES • Multi-Format Import & Export - Share checklists in Garmin (.ace) [.gcl and .gplts coming soon], ForeFlight (.fmd), or Dynon formats with other pilots and avionics systems • ForeFlight Integration - Import your existing ForeFlight checklists and export back in encrypted .fmd format • Dynon Compatibility - Full support for Dynon SkyView checklist format with proper line wrapping • Multiple Aircraft - Manage checklists for your entire fleet in one app • Customizable Sections - Organize by phase of flight: Preflight, Startup, Taxi, Takeoff, Cruise, Landing, Shutdown • Rich Formatting - Add notes, references, conditional items, and amplified procedures • Search & Filter - Quickly find any checklist or item across your entire library BUILT FOR REAL PILOTS Whether you're a student pilot building good habits, a CFI managing training aircraft, or a professional pilot flying complex aircraft, ACE adapts to your needs: • Student Pilots: Learn proper checklist discipline with clear, organized procedures • Flight Instructors: Create standardized checklists for your training fleet • Aircraft Owners: Maintain custom checklists that match your specific equipment and STCs • Professional Pilots: Manage multiple aircraft types with airline-style formatting ONE APP, EVERY DEVICE • Native iPhone, iPad, and Mac apps, all in one download • Edit on the Mac with a full desktop window, menus, and keyboard • Document-based app - Open .ace files directly from Files, email, or other apps • iCloud backup keeps your data safe YOUR DATA, YOUR CONTROL • All checklists stored locally on your device but auto synced via iCloud to other devices you control. • No account required • Core checklist editing is available without a subscription; optional subscriptions and lifetime purchases unlock additional features • Export your data anytime in ACE, ForeFlight, or Dynon formats • Privacy-focused: We never see your checklists IMPORTANT SAFETY NOTICE ACE Checklist Editor is designed to assist pilots but does not replace your aircraft's official Pilot Operating Handbook (POH) or FAA-approved flight manual. Always verify checklist items against your aircraft's official documentation. Every aircraft is unique with different equipment and STCs. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Additional Terms: https://www.acechecklist.com/terms Privacy Policy: https://www.acechecklist.com/privacy

Screenshots

SkewTLogPro3 screens
ACE Checklist Editor4 screens

Verdict

The call

The clearest difference is rating: ACE Checklist Editor at 3.8 against SkewTLogPro's 2.7. ACE Checklist Editor also leads on monetization model (free with in-app purchases vs subscription) and update cadence (every 4 days vs every 2 months). SkewTLogPro's advantage is ratings volume (97 vs 4). On price, review sentiment, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. SkewTLogPro sells 1 in-app purchase, starting at $12.99 per year and ACE Checklist Editor sells 10 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

ACE Checklist Editor holds the better App Store score, 3.8 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 ACE Checklist Editor's.

UpkeepUpdate frequency

SkewTLogPro ships an update every 2 months, ACE Checklist Editor every 4 days. Both last shipped on October 17, 2026.

Scorecard4 real differences · 6 level
SkewTLogPro versus ACE Checklist Editor: the parameters behind the verdict, then further details
ParameterSkewTLogProACE Checklist Editor
PriceFreeFree
Rating2.7 (97 ratings)3.8 (4 ratings) — better
Positive reviews46.7% of reviews50.0% of reviews — better
Number of ratings97 — better4
Update frequencyEvery 2 monthsEvery 4 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationSubscriptionFree with in-app purchases — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 — better18.0
Further details — not scored
Size79 MB13 MB
Age rating4+4+
DeveloperChad SandstedtPatrick Michalina

Customer experience

SkewTLogPro

All ratings96 ratings
Positive40.6%
Neutral4.2%
Negative55.2%
Written reviews105 reviews
Positive46.7%
Neutral2.9%
Negative50.5%

ACE Checklist Editor

All ratings4 ratings
Positive50.0%
Neutral50.0%
Negative0.0%
Written reviews4 reviews
Positive50.0%
Neutral50.0%
Negative0.0%

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
Show 2 more
  • 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
Show 8 more
  • 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

ACE Checklist Editor

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

SkewTLogPro

Subscriptions1
  • Annual Subscription7 Days trial$12.991 Year
10 purchases

ACE Checklist Editor

Subscriptions2
  • ACE Pro Monthly$5.991 Month
  • ACE Pro Annual$49.991 Year
One-time8
  • Fly Mode (Lifetime)$4.99
  • PDF Export (Lifetime)$9.99
  • Beechcraft Baron B55 (BE55)$9.99
Show 5 more
  • Beechcraft Baron B58 (BE58)$9.99
  • Beechcraft Baron B58P (B58T)$9.99
  • Beechcraft Duchess (BE76)$9.99
  • Piper JETPROP (PA46) Checklist$9.99
  • ACE File Access (Lifetime)$99.99

Questions

Is SkewTLogPro free?
SkewTLogPro is free to download, with in-app purchases available.
Is ACE Checklist Editor free?
ACE Checklist Editor is free to download, with in-app purchases available.
Which has better reviews, SkewTLogPro or ACE Checklist Editor?
ACE Checklist Editor is rated higher. SkewTLogPro averages 2.7 out of 5 from 97 ratings, while ACE Checklist Editor averages 3.8 from 4 ratings.
Do SkewTLogPro or ACE Checklist Editor have ads?
Neither SkewTLogPro nor ACE Checklist Editor shows ads.
Which is updated more often, SkewTLogPro or ACE Checklist Editor?
SkewTLogPro ships an update every 2 months, and ACE Checklist Editor every 4 days. Most recently, SkewTLogPro was updated on October 17, 2026 and ACE Checklist Editor on October 17, 2026.

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