Comparison

coolAltitude vs PESE

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

Head to head
About

coolAltitude

This professional tool assists IFR pilots in cold weather with temperature corrections for instrument approaches. It integrates weather, runway, and de-/anti-icing data into a clear workflow to reduce workload and enhance situational awareness during flight preparation.

Highlights
  • Temperature-corrected altitude calculations for various approaches
  • Integrated weather and runway condition data
  • De-/anti-icing support with holdover time timers
  • SNOWTAM decoding and braking action information
  • Save and share approach presets and operational data
Features
Read full description

coolAltitude is a professional aviation tool and calculator for IFR pilots operating in cold-weather conditions. It assists with temperature corrections during instrument approaches and integrates weather, runway and de-/anti-icing data into a single, clear workflow. Designed to reduce workload and improve situational awareness during flight preparation, coolAltitude focuses on accuracy, clarity and operational usability. Some advanced features require a paid subscription. -------------------------------- What coolAltitude does • Calculates temperature-corrected altitudes for ILS (CAT I), RNAV/GNSS, VOR and NDB approaches • Requires minimal data entry, using consistent color coding for immediate interpretation • Displays corrected altitudes along the entire approach profile at relevant DME distances • Supports flight path angle (FPA) calculations for FPA-enabled aircraft • Provides vertical speed reference tables (corrected and uncorrected) for various ground speeds • Includes QNH to QFE conversion tables with temperature corrections -------------------------------- Integrated weather and runway information • Live METAR interaction with automatic propagation of relevant values, including temperature (requires subscription) • SNOWTAM decoding with braking action information • RCAM (Runway Condition Assessment Matrix) based on ICAO GRF • Support for DME shift, including threshold, touchdown zone and displaced DME references -------------------------------- De-/Anti-icing support (requires subscription) • FAA Holdover Time (HOT) Guidelines for multiple fluid types and manufacturers • Integrated HOT countdown timer to track minimum and maximum recommended holdover times • Reference tables supporting assessment of snowfall intensity • Structured storage and sharing of airport-specific de-/anti-icing procedures -------------------------------- Saved and shared data (requires subscription) • Save and reload approach presets for individual airports and procedures • Share verified, structured operational data with other users • Local override of shared data when required -------------------------------- Built for professional use coolAltitude is built by pilots, for pilots. It is designed to support decision-making during high-workload phases without replacing approved procedures. -------------------------------- Important notice coolAltitude is an advisory tool only. It is not certified for operational use and does not replace approved documentation. Use in flight operations requires approval and operation as part of the operator’s Electronic Flight Bag (EFB) in accordance with applicable regulations. -------------------------------- coolAltitude does not replace your procedures. It helps you apply them correctly, even on the coldest days. -------------------------------- Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

PESE

Features
Read full description

Daylight stimulates us and affects our mood and activity levels. When we spend time indoors, the properties of artificial light become important. Using the right light at the right time, human-centric lighting creates a living environment that simulates changes in natural daylight and its visual, biological and emotional effects.

Screenshots

coolAltitude4 screens
PESE4 screens

Verdict

The call

The clearest difference is price: PESE at Free against coolAltitude's $7.99. PESE also leads on in-app purchases (none vs 2) and update cadence (monthly vs every 5 months). On 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

PESE is free to download; coolAltitude costs $7.99 up front. coolAltitude sells 2 in-app purchases, starting at $7.99 per year. PESE asks for nothing beyond the download.

UpkeepUpdate frequency

coolAltitude ships an update every 5 months, PESE monthly. The most recent releases landed on October 13, 2026 and October 7, 2026 respectively.

Scorecard4 real differences · 6 level
coolAltitude versus PESE: the parameters behind the verdict, then further details
ParametercoolAltitudePESE
Price$7.99Free — better
Rating5.0 (7 ratings) — better—
Positive reviews75.0% of reviews—
Number of ratings7 — better—
Update frequencyEvery 5 monthsMonthly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.09.0 — better
Further details — not scored
Size49 MB91 MB
Age rating17+4+
DeveloperSilkIdea s.r.o.pesetech

In-app purchases

2 purchases

coolAltitude

Subscriptions2
  • De & Anti-Icing Pro$7.991 Year
  • Save & Retrieve Approach Data$7.991 Year
None

PESE

No in-app purchases

Questions

Is coolAltitude free?
coolAltitude costs $7.99, and also offers in-app purchases.
Is PESE free?
PESE is free to download, with no in-app purchases.
Do coolAltitude or PESE have ads?
Neither coolAltitude nor PESE shows ads.
Which is updated more often, coolAltitude or PESE?
coolAltitude ships an update every 5 months, and PESE monthly. Most recently, coolAltitude was updated on October 13, 2026 and PESE on October 7, 2026.

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