Comparison

ACN/PCN Calculator vs K4 Tools

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

Head to head
About

ACN/PCN Calculator

This app calculates aircraft pavement classification numbers (PCN) and aircraft classification numbers (ACN) to assess airport pavement strength. It helps pilots and aviation professionals ensure safe operations by verifying aircraft weight limitations on runways, taxiways, and aprons.

Highlights
  • ACN/PCN calculation
  • Pavement strength evaluation
  • Aircraft weight verification
  • ICAO ACN/PCN method
  • Comprehensive aircraft database
  • User-friendly interface
Features
Read full description

ACN/PCN Calculator The Ultimate Pavement Strength Tool for Aviation Professionals The ACN/PCN Calculator is your go-to app for evaluating the bearing strength of airport pavements, designed specifically for pilots, flight operations engineers, dispatchers, and airport operators. Whether you’re dealing with flexible or rigid pavements, this app ensures precise calculations to verify safe operations on runways, taxiways, and aprons. By leveraging the ICAO ACN/PCN method, as outlined in Annex 14 and Document 9157 Part 3, the calculator simplifies complex computations, helping you determine the maximum allowable aircraft weight with confidence. Why Choose the ACN/PCN Calculator? • Comprehensive Aircraft Database: Data is sourced from manufacturers’ publications, including the Aircraft Characteristics for Airport Planning (ACAP) manuals. Where necessary, ICAO-recommended methods or alternative sources ensure accuracy. • User-Friendly Design: Optimized for iPhone 8+ screens and fully compatible with iPads, the interface is intuitive and easy to navigate. Supported Aircraft Models Our extensive database includes popular aircraft from leading manufacturers: A300BeK/B4/B4-600R, A319, A320, A321, A330 (all variants), A340 (all variants), A350 (all variants), A380. B727-200, B737 (all variants), B747-400 (all variants), B747-8/F, B757-200/300, B767 (all variants), B777 (including ER/LR/F variants), B787 (all variants). DHC-8-Q400, Global Express/XRS, G5000, G6000, G7500, CRJ series (100-1000), LearJet (31A/ER, 40, 45, 60/XR), Challenger (300, 350, 604, 605). Cessna Citation II, Bravo, S/II, Encore/Encore+, Jet 3/4, Latitude, Sovereign/Sovereign+, Citation X/XLS+. E170, E195, EMB-120/135, Praetor 600, Phenom 300. G650/ER, G600, G550, G500, G450, G400, G280, G200, GVII-G500/600. An-12, An-124-100/M. ATR 42, ATR 72. Convair CV-580/5800. Falcon: 7X, 50/50EX, 900 (all versions), 2000/2000EX. IL-76T/TD. Beechjet 400 series, Hawker 400XP. Request Additional Aircraft: if you don’t see your aircraft listed, use the Feedback button in the Info tab to request additions.  Aircraft data is regularly updated to meet user needs.

About

K4 Tools

This app assists flight crews with inflight fuel and time calculations, integrating with flight plans. Features include scanning flight data, calculating duty and rest periods, and managing crew breaks. It also helps verify fuel accuracy and pre-flight weather conditions.

Highlights
  • Magic Scanner for FMS data
  • Duty/Rest period calculation
  • Crew break scheduling
  • Fuel receipt verification
  • Pre-flight weather checks
  • iPad optimized interface
Read full description

K4 Tools helps flight crews complete inflight fuel and time checks quickly and accurately — with calculators built around your current flight plan. Highlights: • Magic Scanner: Use the iPhone camera on support models to scan the FMS Position Report and auto-fill required fields. • Duty/Rest Calculator: See Max Duty End, Latest Legal Takeoff, and required rest based on crew size, sequence, and consent — with live remaining duty. • Crew Rest: Share break schedules and keep track visually on the crew break Timeline. • Fuel Checks: Verify pre‑flight fuel upload accuracy across multiple receipts. • Pre-flight weather verification via calculated ETA's at Departure, Destination, Alternate, and ETP Airports. • iPhone + iPad: Optimized for both portrait and landscape use on iPad — including mounted flight-deck configurations.. Limits and warnings appear when operational or contractual thresholds are approached or likely to be exceeded, so you can take corrective action early. Planned updates: - Pro Versioncoming soon! - LogTen Pro integration - tap a button and import all of your flight information with the tap of a button - Crew Rest Alarms automatically set for selected break period. - Custom Crew Rest break lengths

Screenshots

ACN/PCN Calculator4 screens
K4 Tools1 screens

Verdict

The call

The clearest difference is in-app purchases: K4 Tools at none against ACN/PCN Calculator's 26. K4 Tools also leads on rating (5.0 vs 4.6) and update cadence (monthly vs every 2 months). ACN/PCN Calculator's advantage is ratings volume (144 vs 1) and iOS requirement (17.6 vs 26.0). 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. ACN/PCN Calculator sells 26 one-off in-app purchases. K4 Tools asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

K4 Tools holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: ACN/PCN Calculator has 144 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

ACN/PCN Calculator ships an update every 2 months, K4 Tools monthly. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.

Scorecard6 real differences · 4 level
ACN/PCN Calculator versus K4 Tools: the parameters behind the verdict, then further details
ParameterACN/PCN CalculatorK4 Tools
PriceFreeFree
Rating4.6 (144 ratings)5.0 (1 ratings) — better
Positive reviews45.5% of reviews—
Number of ratings144 — better1
Update frequencyEvery 2 monthsMonthly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.6 — better26.0
Further details — not scored
Size4 MB31 MB
Age rating4+4+
DeveloperAeroKitPro LLCJames Everett

Customer experience

ACN/PCN Calculator

All ratings142 ratings
Positive90.1%
Neutral1.4%
Negative8.5%
Written reviews22 reviews
Positive45.5%
Neutral9.1%
Negative45.5%

K4 Tools

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

26 purchases

ACN/PCN Calculator

One-time26
  • G600 (41.7t)Free
  • B737 BBJ (77.7t)$4.99
  • G650 (45.3t)$4.99
Show 23 more
  • Global 5000 (42.0t)$4.99
  • Global 5000 GVFD (42.0t)$4.99
  • Global 6000 (45.2t)$4.99
  • Global Express (44.5t)$4.99
  • G650ER (47.1t)$4.99
  • G650ER (45.3t)$4.99
  • G650ER (45.1t)$4.99
  • G550 (41.4t)$4.99
  • G450 (33.7t)$4.99
  • G280 (18.0t)$4.99
  • GIV-SP (34.0)$4.99
  • CL300 (17.69t)$4.99
  • Global 7500 (52.2t)$4.99
  • GVII-G600 (43.09t)$4.99
  • Citation XLS+ (9.25t)$4.99
  • GV (41.2t)$4.99
  • FALCON 2000EX (19.27t)$4.99
  • Global 6000 (44.5t)$4.99
  • G700 (48.9t)$4.99
  • GVII-G500 (36.28t)$4.99
  • Global Express (45.2t)$4.99
  • G450 (34.0t)$4.99
  • Global Express XRS (45.2t)$4.99
None

K4 Tools

No in-app purchases

Questions

Is ACN/PCN Calculator free?
ACN/PCN Calculator is free to download, with in-app purchases available.
Is K4 Tools free?
K4 Tools is free to download, with no in-app purchases.
Which has better reviews, ACN/PCN Calculator or K4 Tools?
K4 Tools is rated higher. ACN/PCN Calculator averages 4.6 out of 5 from 144 ratings, while K4 Tools averages 5.0 from 1 ratings.
Do ACN/PCN Calculator or K4 Tools have ads?
Neither ACN/PCN Calculator nor K4 Tools shows ads.
Which is updated more often, ACN/PCN Calculator or K4 Tools?
ACN/PCN Calculator ships an update every 2 months, and K4 Tools monthly. Most recently, ACN/PCN Calculator was updated on October 24, 2026 and K4 Tools on October 22, 2026.

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