# Jellywatch vs STC Turtle Tracker

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.

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.

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.

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.

## The numbers

| Metric | Jellywatch | STC Turtle Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/jellywatch/id545501733/reviews)** | [4.7 (42 ratings)](https://appshunter.io/ios/app/stc-turtle-tracker/id1591029453/reviews) |
| Number of ratings | 1 | **42** |
| Positive reviews | **90.9% of reviews** | 87.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 6 MB | 66 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Monterey Bay Aquarium Research Institute](https://appshunter.io/developer/997448509) | [SEA TURTLE CONSERVANCY, INC.](https://appshunter.io/developer/1591029455) |

## What reviewers say

### Jellywatch

[App page](https://appshunter.io/ios/app/jellywatch/id545501733)

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:** macOS Compatibility

**In-app purchases:** none


### STC Turtle Tracker

[App page](https://appshunter.io/ios/app/stc-turtle-tracker/id1591029453)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| STC Turtle Tracker Premium | $2.99 | per month |
| STC Turtle Tracker Premium | $24.99 | per year |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*