# Simrad PRO System Builder vs DockWorks Tether

The clearest difference is update cadence: DockWorks Tether at every 6 days against Simrad PRO System Builder's every 3 months. DockWorks Tether also leads on device support (3 vs 1). Simrad PRO System Builder's advantage is iOS requirement (9.0 vs 11.0). On price, ads and in-app purchases there is nothing between them.

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

Simrad PRO System Builder ships an update every 3 months, DockWorks Tether every 6 days. The most recent releases landed on March 11, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Simrad PRO System Builder | DockWorks Tether |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/dockworks-tether/id6443893878/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 days** |
| Monetization | — | Free |
| Size | 130 MB | 39 MB |
| Requires iOS | **9.0** | 11.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Navico Norway AS](https://appshunter.io/developer/842162153) | [DockMaster Software, Inc](https://appshunter.io/developer/1459527225) |

## What reviewers say

### Simrad PRO System Builder

[App page](https://appshunter.io/ios/app/simrad-pro-system-builder/id1049983593)

**Features:** macOS Compatibility

**In-app purchases:** none


### DockWorks Tether

[App page](https://appshunter.io/ios/app/dockworks-tether/id6443893878)

This app enables marine service professionals to manage job details remotely. It allows users to document work with photos, record job locations, and track work hours by clocking in and out. Functionality is available both online and offline, syncing data when connectivity is restored.

**Highlights:** Job photo capture, Location tracking, Clock in/out for work hours, Offline and online modes, Data sync to home office

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Simrad PRO System Builder free?

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

### Is DockWorks Tether free?

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

### Do Simrad PRO System Builder or DockWorks Tether have ads?

Neither Simrad PRO System Builder nor DockWorks Tether shows ads.

### Which is updated more often, Simrad PRO System Builder or DockWorks Tether?

Simrad PRO System Builder ships an update every 3 months, and DockWorks Tether every 6 days. Most recently, Simrad PRO System Builder was updated on March 11, 2026 and DockWorks Tether on June 1, 2026.

---

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