# Steelhead vs Trolltek

Steelhead and Trolltek 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.

Steelhead ships an update every 5 weeks, Trolltek monthly. The most recent releases landed on October 17, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Steelhead | Trolltek |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/steelhead/id1644144210/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Monthly** |
| Monetization | Free | — |
| Size | 75 MB | 14 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Stevens Water Monitoring Systems, Inc.](https://appshunter.io/developer/503634320) | [Scintex Pty Ltd](https://appshunter.io/developer/1665413523) |

## What reviewers say

### Steelhead

[App page](https://appshunter.io/ios/app/steelhead/id1644144210)

This utility app allows users to connect to and configure compatible sensors via Bluetooth. It enables direct sensor diagnostics, immediate readings, and downloading of stored data for analysis.

**Highlights:** Bluetooth (BLE) connectivity, Sensor configuration (add/change sensors), Reporting/sampling interval adjustment, SDI-12 Transparent mode for diagnostics, Immediate current readings, Download stored data

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

**In-app purchases:** none


### Trolltek

[App page](https://appshunter.io/ios/app/trolltek/id1665413521)

**In-app purchases:** none


## Frequently asked questions

### Is Steelhead free?

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

### Is Trolltek free?

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

### Do Steelhead or Trolltek have ads?

Neither Steelhead nor Trolltek shows ads.

### Which is updated more often, Steelhead or Trolltek?

Steelhead ships an update every 5 weeks, and Trolltek monthly. Most recently, Steelhead was updated on October 17, 2026 and Trolltek on October 19, 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.*