Comparison

PORTSIDE FOS vs ColdTempCorr

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

Head to head
About

PORTSIDE FOS

This app provides aviation professionals with essential flight planning and scheduling tools on their mobile devices. Access aircraft schedules, crew duty times, flight logs, and trip details, with offline capabilities for use in flight. It integrates with desktop companion applications and international trip support services.

Highlights
  • Aircraft Schedules
  • Trip and Leg Details
  • Crew Duty Times
  • Flight Log Entry
  • Expense Submission
  • Offline Airport Directory
  • Weather and NOTAMs
Features
Read full description

The new FOS Mobile App for iPhone and iPad brings all the essentials of scheduling and flight planning to your fingertips. A must have app for aviation professionals on the go. Works online and offline. FOS Mobile requires FOS companion desktop application (version 3.11.4 or later) and/or International Trip Support Services, provided by Rockwell Collins ARINCDirect Flight Services. Flight Operations System (FOS) on the go with access to: - Aircraft Schedules - Trip and Leg Details - Crew Duty times and Briefing - Flight log Entry - Expense Submission - Maintenance Item Visibility - Safety and Service Issues - Document Management - ARINCDirect Flight planning Integration - Flight Risk and Fatigue Integrations Tools Rockwell Collins International Trip Support including: - Trip Creation and Submission - Complete Trip Details - Access to Permits and Handling Information Included for the iPad is a Worldwide offline Airport Directory: - Lookup Airport information when offline in flight - Text weather (Metars, Tafs, Pireps, FD Winds, 7 day forecast) - Notams (all types) - Rockwell Collins Fuel Prices - Hotels (vendors/FBOS) - Local area information

About

ColdTempCorr

This professional aviation tool helps pilots calculate necessary cold temperature corrections for flight operations. It ensures compliance with aviation regulations by providing accurate altitude adjustments in cold weather, enhancing safety and efficiency.

Highlights
  • Cold temperature correction calculations
  • ICAO PANS-OPS and FAA TERPS compliance
  • Advanced atmospheric calculations
  • Constant Descent Final Approach planning
  • Air data conversions
Features
Read full description

Cold Temperature Corrections – Professional Aviation Tool When outside air temperature is colder than ISA, an aircraft’s true altitude is lower than the indicated altitude—reducing terrain and obstacle clearance. To mitigate this risk, regulations require pilots to apply cold temperature corrections. The Cold Temp App streamlines this process with fast, accurate calculations based on the ICAO Cold Temperature Correction Table or precise engineering equations, ensuring compliance with ICAO PANS-OPS and FAA TERPS. In its latest revision, the app has been enhanced with additional modules: • ATMOS Module – Advanced atmospheric calculations, ISA parameters, and air data conversions. • CDFA Module – Constant Descent Final Approach planning with integrated cold temperature corrections. With expanded capabilities, regulatory compliance, and operational accuracy, the Cold Temp App is an essential professional tool for safe and efficient flight operations in cold-weather environments. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

PORTSIDE FOS4 screens
ColdTempCorr4 screens

Verdict

The call

The clearest difference is in-app purchases: PORTSIDE FOS at none against ColdTempCorr's 2. PORTSIDE FOS also leads on iOS requirement (15.6 vs 18.6). On price, review sentiment, update cadence and ads 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. ColdTempCorr sells 2 in-app purchases, starting at $2.99 per 3 months. PORTSIDE FOS asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

Scorecard3 real differences · 7 level
PORTSIDE FOS versus ColdTempCorr: the parameters behind the verdict, then further details
ParameterPORTSIDE FOSColdTempCorr
PriceFreeFree
Rating1.2 (48 ratings) — better—
Positive reviews2.9% of reviews — better0.0% of reviews
Number of ratings48 — better—
Update frequencyEvery 4 monthsEvery 4 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better18.6
Further details — not scored
Size269 MB4 MB
Age rating4+4+
DeveloperPortside, Inc.AeroKitPro LLC

Customer experience

PORTSIDE FOS

All ratings48 ratings
Positive4.2%
Neutral0.0%
Negative95.8%
Written reviews34 reviews
Positive2.9%
Neutral2.9%
Negative94.1%

ColdTempCorr

Written reviews3 reviews
Positive0.0%
Neutral33.3%
Negative66.7%

In-app purchases

None

PORTSIDE FOS

No in-app purchases

2 purchases

ColdTempCorr

Subscriptions2
  • 3 Months subscription1 Month trial$2.993 Months
  • One year subscription1 Month trial$9.991 Year

Questions

Is PORTSIDE FOS free?
PORTSIDE FOS is free to download, with no in-app purchases.
Is ColdTempCorr free?
ColdTempCorr is free to download, with in-app purchases available.
Do PORTSIDE FOS or ColdTempCorr have ads?
Neither PORTSIDE FOS nor ColdTempCorr shows ads.
Which is updated more often, PORTSIDE FOS or ColdTempCorr?
PORTSIDE FOS ships an update every 4 months, and ColdTempCorr every 4 months. Most recently, PORTSIDE FOS was updated on November 2, 2026 and ColdTempCorr on November 3, 2026.

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