# Discount Selector vs Rotating Equipment Selector

Discount Selector and Rotating Equipment Selector are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Discount Selector ships an update every 20 months, Rotating Equipment Selector every 19 months. The most recent releases landed on October 26, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Discount Selector | Rotating Equipment Selector |
| --- | --- | --- |
| 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 20 months | **Every 19 months** |
| Monetization | — | Free |
| Size | 42 MB | 37 MB |
| Requires iOS | 13 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Redmarketing Ltd.](https://appshunter.io/developer/855577123) | [Siemens Energy](https://appshunter.io/developer/1539380213) |

## What reviewers say

### Discount Selector

[App page](https://appshunter.io/ios/app/discount-selector/id1450237500)

**In-app purchases:** none


### 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

**In-app purchases:** none


## Frequently asked questions

### Is Discount Selector free?

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

### Is Rotating Equipment Selector free?

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

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

Neither Discount Selector nor Rotating Equipment Selector shows ads.

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

Discount Selector ships an update every 20 months, and Rotating Equipment Selector every 19 months. Most recently, Discount Selector was updated on October 26, 2026 and Rotating Equipment Selector on October 13, 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.*