# Dowser vs OnScene Xplorer 4

The clearest difference is update cadence: OnScene Xplorer 4 at every 3 months against Dowser's every 8 months. Dowser's advantage is iOS requirement (9.3 vs 13.0). 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.

Dowser ships an update every 8 months, OnScene Xplorer 4 every 3 months. The most recent releases landed on October 24, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Dowser | OnScene Xplorer 4 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/dowser/id1086146583/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 16.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 42 MB | 243 MB |
| Requires iOS | **9.3** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [h3ko Innovations GmbH](https://appshunter.io/developer/1143540818) | [Iron Compass Map Co](https://appshunter.io/developer/1237245091) |

## What reviewers say

### Dowser

[App page](https://appshunter.io/ios/app/dowser/id1086146583)

Digitize and quickly access information about water intake points for emergency services. View nearby points on a map, add your own, and rate existing ones to contribute to a comprehensive database.

**Highlights:** Map view of water intake points, List view sorted by distance, Add new water intake points, Rate existing water intake points, View detailed intake point information, Offline access to data

**Features:** macOS Compatibility

**In-app purchases:** none


### OnScene Xplorer 4

[App page](https://appshunter.io/ios/app/onscene-xplorer-4/id1562927434)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Dowser free?

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

### Is OnScene Xplorer 4 free?

OnScene Xplorer 4 is free to download, with no in-app purchases.

### Do Dowser or OnScene Xplorer 4 have ads?

Neither Dowser nor OnScene Xplorer 4 shows ads.

### Which is updated more often, Dowser or OnScene Xplorer 4?

Dowser ships an update every 8 months, and OnScene Xplorer 4 every 3 months. Most recently, Dowser was updated on October 24, 2026 and OnScene Xplorer 4 on September 10, 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.*