# Rotating Equipment Selector vs NAPEC

The clearest difference is update cadence: NAPEC at every 3 weeks against Rotating Equipment Selector's every 19 months. Rotating Equipment Selector's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Rotating Equipment Selector ships an update every 19 months, NAPEC every 3 weeks. The most recent releases landed on November 5, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Rotating Equipment Selector | NAPEC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/rotating-equipment-selector/id1539380211/reviews)** | — |
| Number of ratings | **5** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 37 MB | 44 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Siemens Energy](https://appshunter.io/developer/1539380213) | [bilel hachemi](https://appshunter.io/developer/1671240661) |

## What reviewers say

### Rotating Equipment Selector

[App page](https://appshunter.io/ios/app/rotating-equipment-selector/id1539380211)

This application assists in selecting centrifugal and reciprocating compressors, gas turbines, and motors. It provides a streamlined process for choosing the right equipment from a leading manufacturer.

**Highlights:** Compressor selection, Gas turbine selection, Motor selection, Equipment specification, Product catalog

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### NAPEC

[App page](https://appshunter.io/ios/app/napec/id1671240659)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Rotating Equipment Selector free?

Rotating Equipment Selector is free to download, with no in-app purchases.

### Is NAPEC free?

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

### Do Rotating Equipment Selector or NAPEC have ads?

Neither Rotating Equipment Selector nor NAPEC shows ads.

### Which is updated more often, Rotating Equipment Selector or NAPEC?

Rotating Equipment Selector ships an update every 19 months, and NAPEC every 3 weeks. Most recently, Rotating Equipment Selector was updated on November 5, 2026 and NAPEC on November 7, 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.*