# ACN/PCN Calculator vs K4 Tools

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.

Both are free to download. ACN/PCN Calculator sells 26 one-off in-app purchases. K4 Tools asks for nothing beyond the download.

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.

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.

## The numbers

| Metric | ACN/PCN Calculator | K4 Tools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (144 ratings)](https://appshunter.io/ios/app/acnpcn-calculator/id1049063069/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/k4-tools/id6758374210/reviews)** |
| Number of ratings | **144** | 1 |
| Positive reviews | 45.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 4 MB | 31 MB |
| Requires iOS | **17.6** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [AeroKitPro LLC](https://appshunter.io/developer/1049063068) | [James Everett](https://appshunter.io/developer/1015137244) |

## What reviewers say

### ACN/PCN Calculator

[App page](https://appshunter.io/ios/app/acnpcn-calculator/id1049063069)

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:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (26)**

| Purchase | Price | Billing |
| --- | --- | --- |
| G600 (41.7t) | Free | one-time |
| B737 BBJ (77.7t) | $4.99 | one-time |
| G650 (45.3t) | $4.99 | one-time |
| Global 5000 (42.0t) | $4.99 | one-time |
| Global 5000 GVFD (42.0t) | $4.99 | one-time |
| Global 6000 (45.2t) | $4.99 | one-time |
| Global Express (44.5t) | $4.99 | one-time |
| G650ER (47.1t) | $4.99 | one-time |
| G650ER (45.3t) | $4.99 | one-time |
| G650ER (45.1t) | $4.99 | one-time |
| G550 (41.4t) | $4.99 | one-time |
| G450 (33.7t) | $4.99 | one-time |
| G280 (18.0t) | $4.99 | one-time |
| GIV-SP (34.0) | $4.99 | one-time |
| CL300 (17.69t) | $4.99 | one-time |
| Global 7500 (52.2t) | $4.99 | one-time |
| GVII-G600 (43.09t) | $4.99 | one-time |
| Citation XLS+ (9.25t) | $4.99 | one-time |
| GV (41.2t) | $4.99 | one-time |
| FALCON 2000EX (19.27t) | $4.99 | one-time |
| Global 6000 (44.5t) | $4.99 | one-time |
| G700 (48.9t) | $4.99 | one-time |
| GVII-G500 (36.28t) | $4.99 | one-time |
| Global Express (45.2t) | $4.99 | one-time |
| G450 (34.0t) | $4.99 | one-time |
| Global Express XRS (45.2t) | $4.99 | one-time |


### K4 Tools

[App page](https://appshunter.io/ios/app/k4-tools/id6758374210)

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

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*