Comparison

Jellywatch 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

Jellywatch

This app serves as a global database for monitoring ocean conditions, focusing on jellyfish populations. It empowers citizen scientists to submit observations and photos, contributing to freely accessible data on blooms, red tides, and general marine environments. Species identification is also offered for submitted images.

Highlights
  • Ocean condition monitoring
  • Jellyfish population tracking
  • Citizen science reporting
  • Global data submission
  • Species identification
  • Free data access
Features
Read full description

Jellywatch is a database for monitoring ocean conditions, especially jellyfish populations. Citizen scientists are encouraged to submit reports from around the world. The data will be freely available to download or browse. Report jellyfish blooms, red tides, and even clean “normal” conditions you observe. If you submit a photo, we can identify the species for you as well.

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

Jellywatch4 screens
STC Turtle Tracker4 screens

Verdict

The call

The clearest difference is in-app purchases: Jellywatch at none against STC Turtle Tracker's 2. Jellywatch also leads on rating (5.0 vs 4.7). STC Turtle Tracker's advantage is ratings volume (42 vs 1). On price, review sentiment, 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. STC Turtle Tracker sells 2 in-app purchases, starting at $2.99 per month. Jellywatch asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Jellywatch holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: STC Turtle Tracker has 42 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 91% of Jellywatch's written reviews are positive against 88% of STC Turtle Tracker's.

UpkeepUpdate frequency

Jellywatch ships an update every 3 months, STC Turtle Tracker every 2 months. The most recent releases landed on June 1, 2026 and September 9, 2026 respectively.

Scorecard4 real differences · 6 level
Jellywatch versus STC Turtle Tracker: the parameters behind the verdict, then further details
ParameterJellywatchSTC Turtle Tracker
PriceFreeFree
Rating5.0 (1 ratings) — better4.7 (42 ratings)
Positive reviews90.9% of reviews — better87.5% of reviews
Number of ratings142 — better
Update frequencyEvery 3 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.0 — better15.1
Further details — not scored
Size6 MB66 MB
Age rating4+4+
DeveloperMonterey Bay Aquarium Research InstituteSEA TURTLE CONSERVANCY, INC.

Customer experience

Jellywatch

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews11 reviews
Positive90.9%
Neutral0.0%
Negative9.1%

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

Jellywatch

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 Jellywatch free?
Jellywatch 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, Jellywatch or STC Turtle Tracker?
Jellywatch is rated higher. Jellywatch averages 5.0 out of 5 from 1 ratings, while STC Turtle Tracker averages 4.7 from 42 ratings.
Do Jellywatch or STC Turtle Tracker have ads?
Neither Jellywatch nor STC Turtle Tracker shows ads.
Which is updated more often, Jellywatch or STC Turtle Tracker?
Jellywatch ships an update every 3 months, and STC Turtle Tracker every 2 months. Most recently, Jellywatch was updated on June 1, 2026 and STC Turtle Tracker on September 9, 2026.

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