# Lowrance System Builder vs S4Y crew app

The clearest difference is ads: Lowrance System Builder at none against S4Y crew app's shown. Lowrance System Builder also leads on iOS requirement (12.0 vs 16.6). S4Y crew app's advantage is update cadence (fortnightly vs every 3 months). On price, 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.

Lowrance System Builder ships an update every 3 months, S4Y crew app fortnightly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Lowrance System Builder | S4Y crew app |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.8 (4 ratings)](https://appshunter.io/ios/app/lowrance-system-builder/id1016369323/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 159 MB | 49 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 17+ |
| Developer | [Navico Norway AS](https://appshunter.io/developer/842162153) | [Miroslav Horvat](https://appshunter.io/developer/1542441834) |

## What reviewers say

### Lowrance System Builder

[App page](https://appshunter.io/ios/app/lowrance-system-builder/id1016369323)

This business tool helps marine electronics dealers create accurate sales quotes for Lowrance equipment. It generates system diagrams, calculates load, and identifies missing parts to ensure complete, working systems are proposed.

**Highlights:** Generate sales quotes with system diagrams, Ensure correct parts for working systems, Create Ethernet and NMEA 2000 connection drawings, Alerts for missing critical parts, Provides product information and specifications, Includes pricing and dimensioned drawings

**Features:** macOS Compatibility

**In-app purchases:** none


### S4Y crew app

[App page](https://appshunter.io/ios/app/s4y-crew-app/id6473546239)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Lowrance System Builder free?

Lowrance System Builder is free to download, with no in-app purchases.

### Is S4Y crew app free?

S4Y crew app is free to download, with no in-app purchases.

### Do Lowrance System Builder or S4Y crew app have ads?

S4Y crew app shows ads; Lowrance System Builder does not.

### Which is updated more often, Lowrance System Builder or S4Y crew app?

Lowrance System Builder ships an update every 3 months, and S4Y crew app fortnightly. Most recently, Lowrance System Builder was updated on October 24, 2026 and S4Y crew app on October 25, 2026.

---

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