Comparison

GLOBE Observer vs The Shark Trust

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

Head to head
About

GLOBE Observer

Contribute to real scientific research by making environmental observations. Document clouds, mosquito habitats, land cover, and trees using your mobile device. Your data supports scientists worldwide, including NASA and NOAA.

Highlights
  • Make environmental observations
  • Document clouds
  • Map mosquito habitats
  • Record land cover
  • Measure tree height
  • Contribute to scientific research
Features
Read full description

The GLOBE Observer app enables you to make observations of your environment. GLOBE Observer is the app of the Global Learning and Observations to Benefit the Environment (GLOBE) Program. The GLOBE Program is an international science and education program that provides students and people of all ages worldwide with the opportunity to participate in data collection and the scientific process, and contribute meaningfully to our understanding of the Earth system and global environment. By using the GLOBE Observer app, you contribute scientific data to your community, students and scientists worldwide, including researchers at NASA, NOAA, and other science research institutions. GLOBE Observer allows all users to contribute observations of clouds, mosquito habitats, land cover, and trees. Trained and certified users can also use the app to submit additional environmental measurements from all GLOBE protocols. GLOBE Clouds allows observers to make regular observations of Earth’s cloud cover and compare them to satellite observations. With GLOBE Mosquito Habitat Mapper, users locate mosquito habitats, observe and identify mosquito larvae, and reduce the potential threat of mosquito borne disease. GLOBE Land Cover is designed to allow users to document what is on the land (trees, grass, buildings, etc.). GLOBE Trees asks users to estimate a tree’s height by taking pictures of trees with their device and answering a few questions. Additional capabilities may be added. Visit us at https://www.globe.gov and https://observer.globe.gov.

About

The Shark Trust

Contribute to shark conservation by reporting sightings and eggcases. This app centralizes five citizen science projects, helping you identify marine life and track your discoveries. Engage with a community of ocean enthusiasts and collect virtual shark cards.

Highlights
  • Five citizen science shark reporting projects
  • Community map of local reports
  • Collectible shark cards
  • Eggcase identification tool
  • User profile and logbook
  • Shark and ray entanglement reporting
Features
Read full description

The Shark Trust app is a centralised and connected space for four citizen science recording projects aiming to discover the extent and distribution of sharks and shark egg cases around the world. Get involved by heading to the beach in search of eggcases or out at sea to find and report shark sightings, using the app to identify what you’ve found. Key features of the app include: • Four citizen science shark reporting projects in one app: the Great Eggcase Hunt, Shark Sightings Database, Basking Shark Project, Shark & Ray Entanglement Network. • Community features, allowing you to see shark and Eggcase reports in your area. • Collectible shark cards, unlocked by submitting your finds across the four citizen science projects. • Step-by-step, location-based identification tool for eggcases in Northwest and Southwest Europe and Australia (more regions to come). • User profile and logbook keeps track of your finds submitted via the app Established in 1997, the Shark Trust is the UK registered charity dedicated to safeguarding the future of sharks through positive change. It does this through science, education, influence and action. Shark sightings, Basking Sharks, and the Shark & Ray Entanglement Network are now also part of the newer, larger Shark Trust app. What's New in This Version Brand new updated design Significantly enhanced functionality Four new citizen science shark projects in addition to the established Great Eggcase Hunt project. 50 collectable shark cards, unlockable by submitting shark and eggcase sightings Community features

Screenshots

GLOBE Observer4 screens
The Shark Trust4 screens

Verdict

The call

The clearest difference is rating: The Shark Trust at 5.0 against GLOBE Observer's 3.1. The Shark Trust also leads on review sentiment (67% vs 34%) and update cadence (every 2 weeks vs every 2 months). GLOBE Observer's advantage is ratings volume (91 vs 5) and iOS requirement (13.0 vs 16.4). On price, ads, in-app purchases and monetization model 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.

ReceptionRating · Positive reviews · Number of ratings

The Shark Trust holds the better App Store score, 5.0 against 3.1. That said, the two scores are not equally well evidenced: GLOBE Observer has 91 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 34% of GLOBE Observer's written reviews are positive against 67% of The Shark Trust's.

UpkeepUpdate frequency

GLOBE Observer ships an update every 2 months, The Shark Trust every 2 weeks. Both last shipped on October 24, 2026.

Scorecard5 real differences · 5 level
GLOBE Observer versus The Shark Trust: the parameters behind the verdict, then further details
ParameterGLOBE ObserverThe Shark Trust
PriceFreeFree
Rating3.1 (91 ratings)5.0 (5 ratings) — better
Positive reviews33.9% of reviews66.7% of reviews — better
Number of ratings91 — better5
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better16.4
Further details — not scored
Size5 MB93 MB
Age rating4+4+
DeveloperNASAShark Trust

Customer experience

GLOBE Observer

All ratings86 ratings
Positive50.0%
Neutral7.0%
Negative43.0%
Written reviews59 reviews
Positive33.9%
Neutral18.6%
Negative47.5%

The Shark Trust

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

Bugs and requests

GLOBE Observer

Reported bugs

39 issues
  • Checking for updates loop
  • 504 error on account creation
  • Fails after step 5 in account creation
  • Robot verification loop
  • App crashes on opening
Show 34 more
  • Observations not submitting (error exclamation mark)
  • Interminable in-app required update
  • Errors in data entry, observations not sending/deleting
  • Invalid password errors
  • Cloud observation chart images disappear
  • No reply from support
  • App doesn't open on iPhone
  • Won't update
  • Logged out, wrong password, account locked
  • Data lost after system crash
  • Cloud ID chart not loading properly
  • Observations keep loading forever
  • iPhone stuck on installing updates
  • App crashes and never fully loads
  • Can't get photos to upload
  • User interface poorly designed
  • No observations shown when there are
  • No way to export data
  • App is forever 'installing updates'
  • Camera portion of data collection quit working
  • No way to submit a report from 'Pictures'
  • Compass won't calibrate
  • Photo feature locks screen
  • No button to take photo
  • App crashes if location is not set
  • Updates take too long
  • Photo submission portal hopeless
  • Native camera app has no prompts to submit photos
  • 'Done' button does nothing
  • 401 unknown error when sending reports
  • App goes bonkers when attaching photo
  • Screen flickers rapidly when attaching photo
  • Cannot get out of camera within app
  • Whirring wheel for update in progress for hours

Requested features

8 requests
  • Improve UI/UX design
  • Add dark mode
  • Better translation
  • Notifications for satellite flyovers
  • Integrate with WorldView or Google Earth
Show 3 more
  • More explanation/examples for cloud types
  • Export data in spreadsheet/GPS format
  • Allow users to contribute design improvements

The Shark Trust

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

GLOBE Observer

No in-app purchases

None

The Shark Trust

No in-app purchases

Questions

Is GLOBE Observer free?
GLOBE Observer is free to download, with no in-app purchases.
Is The Shark Trust free?
The Shark Trust is free to download, with no in-app purchases.
Which has better reviews, GLOBE Observer or The Shark Trust?
The Shark Trust is rated higher. GLOBE Observer averages 3.1 out of 5 from 91 ratings, while The Shark Trust averages 5.0 from 5 ratings.
Do GLOBE Observer or The Shark Trust have ads?
Neither GLOBE Observer nor The Shark Trust shows ads.
Which is updated more often, GLOBE Observer or The Shark Trust?
GLOBE Observer ships an update every 2 months, and The Shark Trust every 2 weeks. Most recently, GLOBE Observer was updated on October 24, 2026 and The Shark Trust on October 24, 2026.

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