# SHIMGE PUMP Selection System vs lineupCalcRF

The clearest difference is update cadence: lineupCalcRF at every 9 days against SHIMGE PUMP Selection System's every 3 weeks. SHIMGE PUMP Selection System's advantage is iOS requirement (12.0 vs 18.0). 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.

SHIMGE PUMP Selection System ships an update every 3 weeks, lineupCalcRF every 9 days. The most recent releases landed on October 25, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | SHIMGE PUMP Selection System | lineupCalcRF |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/lineupcalcrf/id6737461042/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Monetization | — | Free |
| Size | 33 MB | 3 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [旭 汤](https://appshunter.io/developer/1034622624) | [DirectRF](https://appshunter.io/developer/1572692412) |

## What reviewers say

### SHIMGE PUMP Selection System

[App page](https://appshunter.io/ios/app/shimge-pump-selection-system/id6736855209)

**Features:** macOS Compatibility

**In-app purchases:** none


### lineupCalcRF

[App page](https://appshunter.io/ios/app/lineupcalcrf/id6737461042)

Design RF transmitter systems with ease. This tool links all system-level power amplifier parameters, allowing instant visualization of changes to the overall transmitter lineup. Share your designs via clipboard copy.

**Highlights:** System level power amplifier parameter linking, Instant change effect visualization, Gain, efficiency, DC power, and output power calculations, Clipboard copy for sharing, Effortless RF system design

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SHIMGE PUMP Selection System free?

SHIMGE PUMP Selection System is free to download, with no in-app purchases.

### Is lineupCalcRF free?

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

### Do SHIMGE PUMP Selection System or lineupCalcRF have ads?

Neither SHIMGE PUMP Selection System nor lineupCalcRF shows ads.

### Which is updated more often, SHIMGE PUMP Selection System or lineupCalcRF?

SHIMGE PUMP Selection System ships an update every 3 weeks, and lineupCalcRF every 9 days. Most recently, SHIMGE PUMP Selection System was updated on October 25, 2026 and lineupCalcRF on October 21, 2026.

---

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