DoRIS mobile vs KM44
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DoRIS mobile
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DoRIS mobile by from viadonau offers comprehensive information for inland navigation in Austria. Sophisticated information services retrieved from by the system DoRIS (Donau River Information Services) are now available in one app. A useful service for all users of the waterway as well as for everyone interested. DoRIS mobile includes important fairway and traffic related information like: - Water levels - Lock status - Fairway condition (high water, ice, other blockages) - Shallow sections overview - Notices to Skippers - Vertical bridge clearance - Map service Be always up-to-date With DoRIS mobile you always know what’s happening at the Austrian Danube regardless of time and location. An additional push service provides timely notification of relevant changes of the availability of the fairway and ensures that you never miss any important information again. Internationally available The information is available in German and English language. Note: Notices to Skippers from Slovakia cannot be displayed in the current App due to a new data standard. Integration is foreseen when available again. This service is provided by via donau – Österreichische Wasserstraßen-Gesellschaft mbH. www.viadonau.org; www.doris.bmvit.gv.at
KM44
This app helps determine your position on federal waterways using GPS. It's useful when waterway markers are obscured, out of sight, or missing, allowing you to identify your location on the river.
- GPS-based position determination
- Identifies waterway kilometer markers
- Useful when markers are obscured
- Works on federal waterways
- Assists in navigation
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Bundeswasserstraßen sind dem allgemeinen Verkehr dienende Wasserstraßen des Bundes. Sie verfügen in der Regel über eine sogenannte Kilometrierung (Beschilderung), anhand derer sich die eigene Position auf einer Wasserstraße bestimmen lässt. Befindet man sich auf oder in der unmittelbaren Nähe einer Wasserstraße, kann die Kilometrierung mit dieser App aus einem GPS-Signal abgeleitet werden. Dies ist beispielsweise hilfreich, wenn das Schild mit der Flusskilometerangabe zwar in der Nähe, aber nicht sichtbar ist, oder es aufgrund der Entfernung nicht erkennbar ist oder komplett fehlt.
Screenshots
Verdict
The clearest difference is device support: DoRIS mobile at 3 against KM44's 1. DoRIS mobile also leads on iOS requirement (15.6 vs 26.6). On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
DoRIS mobile ships an update every 6 months, KM44 every 3 months. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.
| Parameter | DoRIS mobile | KM44 |
|---|---|---|
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| Update frequency | Every 6 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 26.6 |
| Further details — not scored | ||
| Size | 46 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | via donau - Oesterreichische Wasserstrassen-Gesellschaft mbH | Jan Fiegert |
In-app purchases
DoRIS mobile
No in-app purchases
KM44
No in-app purchases









