# Know My PT6 vs Invoice+

The clearest difference is in-app purchases: Know My PT6 at none against Invoice+'s 2. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Invoice+ sells 2 in-app purchases, starting at $7.99 per month. Know My PT6 asks for nothing beyond the download.

## The numbers

| Metric | Know My PT6 | Invoice+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5 ratings)](https://appshunter.io/ios/app/know-my-pt6/id1469902010/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Monetization | Free | — |
| Size | 48 MB | 1 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pratt & Whitney Canada Cie](https://appshunter.io/developer/1468490552) | [Invoiceplus Software Inc.](https://appshunter.io/developer/601276840) |

## What reviewers say

### Know My PT6

[App page](https://appshunter.io/ios/app/know-my-pt6/id1469902010)

This app provides pilots and operators with maintenance and power management recommendations for the PT6 turboprop engine. Access the complete engine handbook, news, services, and support information, with both online and offline capabilities.

**Highlights:** Maintenance recommendations, Power management advice, Complete engine handbook, Service Information Letters, Authorized service facilities, Parts distributors, Online and offline access

**Features:** macOS Compatibility

**In-app purchases:** none


### Invoice+

[App page](https://appshunter.io/ios/app/invoice-plus/id6449608595)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $7.99 | per month |
| Yearly | $49.99 | per year |


## Frequently asked questions

### Is Know My PT6 free?

Know My PT6 is free to download, with no in-app purchases.

### Is Invoice+ free?

Invoice+ is free to download, with in-app purchases available.

### Do Know My PT6 or Invoice+ have ads?

Neither Know My PT6 nor Invoice+ shows ads.

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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.*