Comparison

OstSeeTiere vs GEOMAR Authenticator

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

Head to head
About

OstSeeTiere

Report sightings and strandings of Baltic Sea marine mammals, including porpoises and seals. All submitted data is publicly displayed on an interactive map and scientifically analyzed to aid conservation efforts and research.

Highlights
  • Report marine mammal sightings
  • Report marine mammal strandings
  • Interactive map of sightings
  • Scientific data analysis
  • Supports conservation efforts
  • Information on porpoises and seals
Features
Read full description

Mit dieser App können Sichtungen und Totfunde von Meeressäugetieren der Ostsee, wie den bedrohten Schweinswalen (IUCN Rote Liste) und den Robben (Kegelrobbe, Seehund und Ringelrobbe) gemeldet werden. Alle gemeldeten Sichtungen werden der Öffentlichkeit in einer interaktiven Karte zugänglich gemacht. Gemeldete Totfunde an der Küste Mecklenburg-Vorpommern werden durch das Deutschen Meeresmuseum (DMM) in Stralsund geborgen und eingehend auf Gesundheitszustand und Todesursache untersucht. Diese Daten werden vom DMM wissenschaftlich ausgewertet, interpretiert und ergänzen dadurch weitere wissenschaftliche Methoden zur Erforschung der Meeressäugetiere, wie der Flug- und Schiffzählung und den akustischen Lautaufnahmen. Mithilfe dieser gesammelten Daten können Gebiete in der Ostsee, welche von besonderer Bedeutung sind, z.B. für die Aufzucht bzw. Geburt von Schweinswalkälbern, lokalisiert werden. Des Weiteren dienen die Daten für die Erhaltung und ggfs. Erweiterung bestehender Schutzkonzepte.

About

GEOMAR Authenticator

Features
Read full description

The GEOMAR Authenticator provides an easy and secure multi-factor authentication for your accounts. Such authentication provides a second layer of security and should be used to secure all accounts in the Internet.

Screenshots

OstSeeTiere3 screens
GEOMAR Authenticator2 screens

Verdict

The call

The clearest difference is update cadence: GEOMAR Authenticator at every 3 months against OstSeeTiere's every 6 months. GEOMAR Authenticator also leads on iOS requirement (13.0 vs 18.6). On price, ads, in-app purchases and device support 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

OstSeeTiere ships an update every 6 months, GEOMAR Authenticator every 3 months. The most recent releases landed on June 24, 2026 and September 9, 2026 respectively.

Scorecard2 real differences · 6 level
OstSeeTiere versus GEOMAR Authenticator: the parameters behind the verdict, then further details
ParameterOstSeeTiereGEOMAR Authenticator
PriceFreeFree
Positive reviews20.0% of reviews—
Update frequencyEvery 6 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.613.0 — better
Further details — not scored
Size2 MB42 MB
Age rating4+4+
DeveloperDaniel EmdenNetKnights GmbH

In-app purchases

None

OstSeeTiere

No in-app purchases

None

GEOMAR Authenticator

No in-app purchases

Questions

Is OstSeeTiere free?
OstSeeTiere is free to download, with no in-app purchases.
Is GEOMAR Authenticator free?
GEOMAR Authenticator is free to download, with no in-app purchases.
Do OstSeeTiere or GEOMAR Authenticator have ads?
Neither OstSeeTiere nor GEOMAR Authenticator shows ads.
Which is updated more often, OstSeeTiere or GEOMAR Authenticator?
OstSeeTiere ships an update every 6 months, and GEOMAR Authenticator every 3 months. Most recently, OstSeeTiere was updated on June 24, 2026 and GEOMAR Authenticator on September 9, 2026.

Other comparisons