# Mecwin RMS vs Solar Pump

The clearest difference is update cadence: Solar Pump at every 4 days against Mecwin RMS's fortnightly. Mecwin RMS's advantage is iOS requirement (13.0 vs 15.1). 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.

Mecwin RMS ships an update fortnightly, Solar Pump every 4 days. The most recent releases landed on October 7, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Mecwin RMS | Solar Pump |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 4 days** |
| Size | 77 MB | 25 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Gully2Global](https://appshunter.io/developer/1698378208) | [Transparent Blue Water LLC](https://appshunter.io/developer/1847968351) |

## What reviewers say

### Mecwin RMS

[App page](https://appshunter.io/ios/app/mecwin-rms/id6476883323)

**Features:** macOS Compatibility

**In-app purchases:** none


### Solar Pump

[App page](https://appshunter.io/ios/app/solar-pump-solar-pumping/id6800800302)

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

**In-app purchases:** none


## Frequently asked questions

### Is Mecwin RMS free?

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

### Is Solar Pump free?

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

### Do Mecwin RMS or Solar Pump have ads?

Neither Mecwin RMS nor Solar Pump shows ads.

### Which is updated more often, Mecwin RMS or Solar Pump?

Mecwin RMS ships an update fortnightly, and Solar Pump every 4 days. Most recently, Mecwin RMS was updated on October 7, 2026 and Solar Pump on October 4, 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.*