Comparison

ASM Vessel Tracker vs ISN Observer App

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

Head to head
About

ASM Vessel Tracker

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Now track all your vessels in your smartphone! Please send in your feedback. More updates are on the way!

About

ISN Observer App

Features
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The Indigenous Sentinels app, enables data collection using standard methods and protocols - rooted in Indigenous and traditional knowledge - to produce credible and actionable insights that address needs and priorities of communities for environmental and ecological monitoring. Our mission is to empower communities to lead in environmental monitoring and research by integrating Indigenous, Traditional, and local knowledge with scientific data to drive effective ecosystem stewardship and resource management. ISN is a modern approach to caring for and stewarding the land. Data collection priorities are set by communities and collaborating researchers and can range from environmental data related to extreme weather events such as wind speed or storm surge, or ecological indicators such as species distribution and phenology, presence of invasive species or declines in important subsistence species. ISN employs rigorous protocols for data validity and reliability, blending scientific, social, and Indigenous methodologies. ISN ensures data accuracy through quality assurance and control mechanisms, and its co-production methods foster partnerships between community Sentinels and resource managers, aligning protocols with scientific standards and community needs. ISN provides the technical infrastructure and tools for Tribes to lead in defining research priorities, generating and managing access to data equitably, and ensuring that future ecological and environmental monitoring strategies address Indigenous communities’ needs and priorities. The ISN system’s core function is to support the implementation of community-driven monitoring programs. ISN Data Collection Programs are sets of related observation activities that group various data collection forms/surveys. The Programs module in the app organizes data collection forms, users, and observations into manageable categories for a defined network of communities and organizations. On the ISN app, an ‘observation’ is a single data point collected in a survey/form related to certain species, environmental variables or events at a specific point in space and time within a data collection program. The mobile app supports the entry of observations while offline, making the system ideal for use in remote areas and tribal communities. The data from observations go through quality assurance and are used in analysis and reporting. Geospatial and mapping functionality supports program effectiveness by allowing users to use relevant GIS map layers and maintain a spatially organized context to their data, contributing to more comprehensive recordkeeping and informed decision-making.

Screenshots

ASM Vessel Tracker2 screens
ISN Observer App4 screens

Verdict

The call

The clearest difference is iOS requirement: ASM Vessel Tracker at 9.0 against ISN Observer App's 15.6. 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

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

ASM Vessel Tracker ships an update monthly, ISN Observer App every 3 weeks. The most recent releases landed on October 3, 2026 and October 12, 2026 respectively.

Scorecard1 real difference · 5 level
ASM Vessel Tracker versus ISN Observer App: the parameters behind the verdict, then further details
ParameterASM Vessel TrackerISN Observer App
PriceFreeFree
Update frequencyMonthlyEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better15.6
Further details — not scored
Size33 MB152 MB
Age rating17+17+
DeveloperMariApps Marine Solutions Pvt. Ltd.Aleut Community of St. Paul Island Tribal Government

In-app purchases

None

ASM Vessel Tracker

No in-app purchases

None

ISN Observer App

No in-app purchases

Questions

Is ASM Vessel Tracker free?
ASM Vessel Tracker is free to download, with no in-app purchases.
Is ISN Observer App free?
ISN Observer App is free to download, with no in-app purchases.
Do ASM Vessel Tracker or ISN Observer App have ads?
Neither ASM Vessel Tracker nor ISN Observer App shows ads.
Which is updated more often, ASM Vessel Tracker or ISN Observer App?
ASM Vessel Tracker ships an update monthly, and ISN Observer App every 3 weeks. Most recently, ASM Vessel Tracker was updated on October 3, 2026 and ISN Observer App on October 12, 2026.

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