Comparison

ISS River Catalog vs KlarBrief

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

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📊 Productivity

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About

ISS River Catalog

Features

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Informationen über aktuelle Routen auf den Wasserstraßen. - Darstellung der gewünschten Route auf einer Karte. - Details zu der jeweiligen Route mit Grundinformationen. - Auskunft über aktuelle Pegelstände mit Historie und Vorhersagen - Auskunft über Schleusen, Liegeplätze, Häfen und Bunkerstellen - Suche nach POIs im ausgewähltem Umkreis - Berechnung von Emissionen

About

KlarBrief

Features

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You live in Germany. Mail arrives. Government offices, landlords, health insurance – all in German, none of it understandable. KlarBrief changes that: Take a photo of the document, and the app explains everything – in your language, in seconds. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://klarbrief.app/#legal

Screenshots

ISS River Catalog4 screens

KlarBrief4 screens

Verdict

The call

The clearest difference is in-app purchases: ISS River Catalog at none against KlarBrief's 5. ISS River Catalog also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.6). On price, update cadence and ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. KlarBrief sells 5 in-app purchases, starting at $2.99 per month. ISS River Catalog asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 2, 2026 and October 25, 2026 respectively.

Scorecard3 real differences · 3 level

ISS River Catalog versus KlarBrief: the parameters behind the verdict, then further details
Parameter	ISS River Catalog	KlarBrief
Price	Free	Free
Update frequency	Every 2 months	Every 2 months
Ads	No	No
In-app purchases	No — better	Yes
Devices	iPhone, iPad, iPod — better	iPhone
Requires iOS	15.0 — better	17.6
Further details — not scored
Size	19 MB	11 MB
Age rating	4+	4+
Developer	INOSYS GmbH Innovative Computersysteme	Maximilian Graf von Korff

In-app purchases

None

ISS River Catalog

No in-app purchases

5 purchases

KlarBrief

Subscriptions4

KlarBrief Starter$2.991 Month
KlarBrief Pro$3.991 Month
KlarBrief Starter (Yearly)$24.991 Year

Show 1 more

KlarBrief Pro (Yearly)$39.901 Year

One-time1

Full Version$149.99

Questions

Is ISS River Catalog free?

ISS River Catalog is free to download, with no in-app purchases.

Is KlarBrief free?

KlarBrief is free to download, with in-app purchases available.

Do ISS River Catalog or KlarBrief have ads?

Neither ISS River Catalog nor KlarBrief shows ads.

Which is updated more often, ISS River Catalog or KlarBrief?

ISS River Catalog ships an update every 2 months, and KlarBrief every 2 months. Most recently, ISS River Catalog was updated on November 2, 2026 and KlarBrief on October 25, 2026.