# Charts+ vs ACN/PCN Calculator

The clearest difference is rating: ACN/PCN Calculator at 4.6 against Charts+'s 1.3. ACN/PCN Calculator also leads on review sentiment (45% vs 6%) and ratings volume (144 vs 13). Charts+'s advantage is in-app purchases (none vs 10) and iOS requirement (12.0 vs 17.6). On price, ads and device support there is nothing between them.

Both are free to download. ACN/PCN Calculator sells 10 one-off in-app purchases. Charts+ asks for nothing beyond the download.

ACN/PCN Calculator holds the better App Store score, 4.6 against 1.3. That said, the two scores are not equally well evidenced: ACN/PCN Calculator has 144 ratings behind it against 13, so its average is the more settled of the two. Written reviews point the same way: 6% of Charts+'s written reviews are positive against 45% of ACN/PCN Calculator's.

Charts+ ships an update every 5 months, ACN/PCN Calculator every 2 months. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Charts+ | ACN/PCN Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.3 (13 ratings)](https://appshunter.io/ios/app/charts-plus/id843489884/reviews) | **[4.6 (144 ratings)](https://appshunter.io/ios/app/acnpcn-calculator/id1049063069/reviews)** |
| Number of ratings | 13 | **144** |
| Positive reviews | 5.6% of reviews | **45.5% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 123 MB | 4 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Navblue Inc.](https://appshunter.io/developer/455732159) | [AeroKitPro LLC](https://appshunter.io/developer/1049063068) |

## What reviewers say

### Charts+

[App page](https://appshunter.io/ios/app/charts-plus/id843489884)

This app provides pilots with worldwide enroute maps, terminal charts, and a document viewer for airline documentation. It features a search engine, clipboard, and bookmarking for easy access to flight information.

**Highlights:** Worldwide enroute map with polar routes, Terminal charts viewer with sketches, Document viewer with search engine, Clipboard and bookmark function, Electronic Flight Bag functionality

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| G600 (41.7t) | Free | one-time |
| G650 (45.3t) | $4.99 | one-time |
| Global 5000 GVFD (42.0t) | $4.99 | one-time |
| Global 6000 (45.2t) | $4.99 | one-time |
| G650ER (47.1t) | $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 |
| Global 7500 (52.2t) | $4.99 | one-time |
| FALCON 7X (31.8t) | $4.99 | one-time |


## Frequently asked questions

### Is Charts+ free?

Charts+ is free to download, with no in-app purchases.

### Is ACN/PCN Calculator free?

ACN/PCN Calculator is free to download, with in-app purchases available.

### Which has better reviews, Charts+ or ACN/PCN Calculator?

ACN/PCN Calculator is rated higher. Charts+ averages 1.3 out of 5 from 13 ratings, while ACN/PCN Calculator averages 4.6 from 144 ratings.

### Do Charts+ or ACN/PCN Calculator have ads?

Neither Charts+ nor ACN/PCN Calculator shows ads.

### Which is updated more often, Charts+ or ACN/PCN Calculator?

Charts+ ships an update every 5 months, and ACN/PCN Calculator every 2 months. Most recently, Charts+ was updated on November 1, 2026 and ACN/PCN Calculator on November 6, 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.*