Comparison

SkewTLogPro vs DaysToEvent

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

DaysToEvent

This app helps you keep track of important upcoming events with a simple countdown. Easily add custom events, view the remaining days, and stay organized for everything from holidays to personal milestones. All your important dates are automatically saved and sorted.

Highlights
  • Unlimited event tracking
  • Custom event names and dates
  • Automatic date sorting
  • Instant countdown view
  • Swipe to delete events
  • Automatic event saving
Features
Read full description

DaysTo — Event Countdown Tracker Never lose track of the days until your most important moments. DaysTo is a simple, elegant countdown app that keeps all your upcoming events in one place. Add an event, pick a date, and instantly know exactly how many days away it is — no clutter, no complexity. Perfect for tracking: Weddings and anniversaries Birthdays and graduations Vacations and travel Medical appointments Holidays and celebrations Deadlines and special occasions Features: Add unlimited events with custom names and dates Events automatically sorted by date Tap any event to instantly see the countdown Swipe left to delete events you no longer need All events saved automatically — always there when you need them Whether you're counting down to something exciting or just staying organized, DaysTo gives you a clear, beautiful view of what's ahead. Download DaysTo today and always know what's coming next.

Screenshots

SkewTLogPro3 screens
DaysToEvent2 screens

Verdict

The call

The clearest difference is rating: DaysToEvent at 4.5 against SkewTLogPro's 2.6. DaysToEvent also leads on in-app purchases (none vs 1) and update cadence (fortnightly vs every 2 months). SkewTLogPro's advantage is ratings volume (99 vs 2) and iOS requirement (17.0 vs 26.5). On price, ads and device support 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. DaysToEvent asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

DaysToEvent holds the better App Store score, 4.5 against 2.6. That said, the two scores are not equally well evidenced: SkewTLogPro has 99 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

SkewTLogPro ships an update every 2 months, DaysToEvent fortnightly. The most recent releases landed on October 21, 2026 and October 11, 2026 respectively.

Scorecard6 real differences · 4 level
SkewTLogPro versus DaysToEvent: the parameters behind the verdict, then further details
ParameterSkewTLogProDaysToEvent
PriceFreeFree
Rating2.6 (99 ratings)4.5 (2 ratings) — better
Positive reviews46.7% of reviews—
Number of ratings99 — better2
Update frequencyEvery 2 monthsFortnightly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscriptionFree — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 — better26.5
Further details — not scored
Size79 MB0 MB
Age rating4+4+
DeveloperChad SandstedtNorman Happ

Customer experience

SkewTLogPro

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

DaysToEvent

All ratings2 ratings
Positive100.0%
Neutral0.0%
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

DaysToEvent

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

SkewTLogPro

Subscriptions1
  • Annual Subscription7 Days trial$12.991 Year
None

DaysToEvent

No in-app purchases

Questions

Is SkewTLogPro free?
SkewTLogPro is free to download, with in-app purchases available.
Is DaysToEvent free?
DaysToEvent is free to download, with no in-app purchases.
Which has better reviews, SkewTLogPro or DaysToEvent?
DaysToEvent is rated higher. SkewTLogPro averages 2.6 out of 5 from 99 ratings, while DaysToEvent averages 4.5 from 2 ratings.
Do SkewTLogPro or DaysToEvent have ads?
Neither SkewTLogPro nor DaysToEvent shows ads.
Which is updated more often, SkewTLogPro or DaysToEvent?
SkewTLogPro ships an update every 2 months, and DaysToEvent fortnightly. Most recently, SkewTLogPro was updated on October 21, 2026 and DaysToEvent on October 11, 2026.

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