Comparison

Coastal Observer | SPOTTERON vs STC Turtle Tracker

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

Head to head
About

Coastal Observer | SPOTTERON

This app empowers citizens to monitor local weather and water conditions, contributing to climate change research. Users can document environmental observations, weather impacts, water levels, and water quality to help build a sustainable future.

Highlights
  • Environmental observations
  • Weather documentation
  • Water level measurement
  • Water quality monitoring
  • Photo documentation
  • Educational curriculum integration
Features
Read full description

Climate change will impact where and how humans live. As tides rise and storms intensify, humans will be forced to adapt to the changing environment and increase resiliency by learning more about local impacts of rising tides and intensified storms. The Coastal Observer App encourages citizens to become active in monitoring weather and water locally, and will help researchers build a pathway for a sustainable future. The citizen scientists may choose from 4 activities: 1) basic environmental observations by sharing how the current setting makes you feel. 2) weather observations to document the current weather and its impacts. 3) water level to document where the water levels are and how this might impact infrastructure, life, or property. 4) water quality to document how our environment is impacted by human practices. Observing Weather Events Weather events can have devastating effects on local communities. Using this application, the observer can make note of stormy conditions and its associated affects. This information will be documented through photographs and user documentation. Measuring Water Level If there is an installed and fixed water level gauge near you, feel free to use that gauge to enter your water level. For help locating existing gauges, please visit this link. If there are no installed, fixed gauges, you can report a value from a nearby automated gauge at the time of your observation, or simply take a picture to document the water level visually. NOTE - Never attempt to measure water levels during unsafe conditions or without proper training. Monitoring Water Quality Users may use a Secchi Disk to make manual observations of water clarity. For more information, visit the Secchi Disk Project at www.secchidisk.org Coastal Observer for Schools Schools can easily include the Coastal Observer App in their curriculum. Educators can utilize the app to teach reading water levels or using a Secchi Disk to increase environmental awareness in students, while also providing the opportunity to express feelings about water and weather events. The project runs on the SPOTTERON Citizen Science platform for participatory research and awareness building.

About

STC Turtle Tracker

Follow the real-time journeys of tagged sea turtles as they migrate across oceans. Learn their individual stories and discover how your support helps protect these vital ocean indicators.

Highlights
  • Real-time turtle tracking
  • Individual turtle stories and histories
  • Detailed migration route maps
  • Updates on turtle movements
  • Support conservation efforts
  • Learn about ocean health
Features
Read full description

Follow real sea turtles – Koa, Donna Shello, Haven, and dozens more – as they navigate thousands of miles across the world's oceans. Watch their journeys unfold in real time, learn their stories, and become part of the effort to protect them. The Turtle Tracker app connects you directly to sea turtles fitted with satellite transmitters by researchers and conservationists. These aren't simulations – they're real animals, tracked as they migrate between feeding grounds, traverse ocean currents, and return to nest on the beaches where they were born. Get to know each turtle Every turtle has a name, a history, and a journey worth following. See where they were released, how far they've traveled, and what they've been up to. Add your favorites and check in as their tracks grow across the map. Watch migrations unfold Explore detailed route maps showing each turtle's path from release to their latest ping. See the distances they cover – sometimes thousands of miles – and the speeds they maintain across the open ocean. Stay updated The home feed shows you which turtles moved recently, highlights the week's top travelers, and keeps you connected to what's happening in real time. Go Premium to support sea turtle conservation Upgrade to unlock leaderboards, exclusive features, and – most importantly – directly fund the research and protection efforts that keep these animals safe. Every subscription helps Sea Turtle Conservancy continue its work. Why it matters Sea turtles are among the oldest creatures on Earth and vital indicators of ocean health. Whether they thrive or vanish says something profound about our ability to share this planet with other species. Sea Turtle Conservancy, founded in 1959 by world-renowned naturalist Dr. Archie Carr, is the world's oldest sea turtle research and conservation organization. Your engagement — and your support — helps continue over six decades of work protecting these remarkable animals. Important links: https://conserveturtles.org/terms-of-use/ https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ https://conserveturtles.org/privacy-policy/

Screenshots

Coastal Observer | SPOTTERON4 screens
STC Turtle Tracker4 screens

Verdict

The call

The clearest difference is in-app purchases: Coastal Observer | SPOTTERON at none against STC Turtle Tracker's 2. Coastal Observer | SPOTTERON also leads on review sentiment (100% vs 88%) and iOS requirement (12.0 vs 15.1). STC Turtle Tracker's advantage is update cadence (every 2 months vs every 4 months) and ratings volume (42 vs 10). On price, rating, ads 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. STC Turtle Tracker sells 2 in-app purchases, starting at $2.99 per month. Coastal Observer | SPOTTERON asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Coastal Observer | SPOTTERON against 4.7 for STC Turtle Tracker. Both are backed by a comparable volume of ratings — 10 and 42 respectively. Written reviews are what separate them: 100% of Coastal Observer | SPOTTERON's written reviews are positive against 88% of STC Turtle Tracker's.

UpkeepUpdate frequency

Coastal Observer | SPOTTERON ships an update every 4 months, STC Turtle Tracker every 2 months. Both last shipped on October 24, 2026.

Scorecard6 real differences · 4 level
Coastal Observer | SPOTTERON versus STC Turtle Tracker: the parameters behind the verdict, then further details
ParameterCoastal Observer | SPOTTERONSTC Turtle Tracker
PriceFreeFree
Rating4.7 (10 ratings) — better4.7 (42 ratings)
Positive reviews100.0% of reviews — better87.5% of reviews
Number of ratings1042 — better
Update frequencyEvery 4 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.1
Further details — not scored
Size62 MB66 MB
Age rating4+4+
DeveloperSPOTTERON GmbhSEA TURTLE CONSERVANCY, INC.

Customer experience

Coastal Observer | SPOTTERON

All ratings10 ratings
Positive90.0%
Neutral0.0%
Negative10.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

STC Turtle Tracker

All ratings42 ratings
Positive92.9%
Neutral2.4%
Negative4.8%
Written reviews8 reviews
Positive87.5%
Neutral12.5%
Negative0.0%

In-app purchases

None

Coastal Observer | SPOTTERON

No in-app purchases

2 purchases

STC Turtle Tracker

Subscriptions2
  • STC Turtle Tracker Premium$2.991 Month
  • STC Turtle Tracker Premium$24.991 Year

Questions

Is Coastal Observer | SPOTTERON free?
Coastal Observer | SPOTTERON is free to download, with no in-app purchases.
Is STC Turtle Tracker free?
STC Turtle Tracker is free to download, with in-app purchases available.
Which has better reviews, Coastal Observer | SPOTTERON or STC Turtle Tracker?
Coastal Observer | SPOTTERON is rated higher. Coastal Observer | SPOTTERON averages 4.7 out of 5 from 10 ratings, while STC Turtle Tracker averages 4.7 from 42 ratings.
Do Coastal Observer | SPOTTERON or STC Turtle Tracker have ads?
Neither Coastal Observer | SPOTTERON nor STC Turtle Tracker shows ads.
Which is updated more often, Coastal Observer | SPOTTERON or STC Turtle Tracker?
Coastal Observer | SPOTTERON ships an update every 4 months, and STC Turtle Tracker every 2 months. Most recently, Coastal Observer | SPOTTERON was updated on October 24, 2026 and STC Turtle Tracker on October 24, 2026.

Other comparisons