Adopt vs Fulcanelli
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Adopt
Access real-time data from autonomous oceanographic floats that record seismic activity. View instrument locations, trajectories, and health parameters. This app provides a low-cost method for oceanic data collection.
- View MERMAID instrument locations
- Access recent trajectories
- Obtain ocean depth information
- View instrumental metadata
- Identify instruments by name and institution
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Adopt-A-Float allows users to access trajectory metadata and state-of-health parameters of the EarthScope-Oceans MERMAID fleet. MERMAID, short for Mobile Earthquake Recording in Marine Areas by Independent Divers, is a long-lived drifting autonomous float equipped with a hydrophone capable of recording acoustic waveforms generated by distant earthquakes. Most earthquakes occur at or near plate boundaries, yet most seismic monitoring stations are on dry land. Deployed but not recovered, telemetering data in near-real-time, MERMAIDs are uniquely positioned as a low-cost alternative for geophysical and environmental oceanic data collection. Diving down to a typical parking depth of 1500 m below the ocean surface, they passively drift with the ocean currents, recording the ambient acoustic wavefield, identifying earthquake signals, and surfacing to report those, on average every 4-7 days with the current settings, which are expected to give them a five-year life span. When at the surface, MERMAID collects GPS location and time information and communicates with the IRIDIUM satellite constellation using RUDICS. Using this iOS app you can: View the current location of all MERMAID instruments View their most recent trajectories and obtain information about ocean depth View instrumental metadata such as battery level and instrument pressure readings Identify the instruments by name and by operating institution Developed by Tenzing Sherpa ©2021 by Frederik J Simons (www.frederik.net) Let us know what you think! Give us feedback via https://github.com/tenzingsherpaa/AdoptAFloat-3.0/issues We acknowledge support from the U.S. National Science Foundation (www.nsf.org) under grants OCE-1917058 and EAR-1150145 (CAREER), and from Princeton University. MERMAID was designed by scientists and engineers and is now built by OSEAN SAS (www.osean.fr), from which it is commercially available. EarthScope-Oceans (www.earthscopeoceans.org) is an organization founded by a multidisciplinary group of geoscientists who are coordinating efforts to create a global network of sensors that monitor the Earth from within the oceanic environment. As other organizations are doing for the land-based seismological communities today, EarthScope-Oceans shepherds national projects into the international arena where globally relevant, applicable, and mutually agreed-upon decisions can be made on instrument development, science objectives, data management, and outreach.
Fulcanelli
Monitor live Earth activity including earthquakes and space weather on an interactive map. Receive daily intelligence briefings summarizing seismic and geomagnetic conditions. This app provides pattern analysis and education, not predictions.
- Live earthquake feed and map
- Magnitude and geography filters
- Space weather layers and dashboards
- Daily Earth Intelligence briefings
- Alert preferences
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Fulcanelli is your live Earth activity dashboard — earthquakes, space weather, and clear intelligence briefings in one place. See recent USGS earthquakes on an interactive map with QuakeFeed-style green land and glowing seismic ripples at each epicenter. Filter by magnitude and region, tap the feed to jump straight to the quake, and zoom in for a closer look at what just happened. Track the space weather layers that surround our planet: • Solar flares • Geomagnetic storms • Aurora / planetary Kp • Schumann resonance Read a shared daily Earth Intelligence briefing — pre-generated so everyone sees the same clear summary of seismic clusters, geomagnetic conditions, and notable patterns. Pattern analysis and education only. Fulcanelli does not predict earthquakes. Whether you’re following California, Alaska, the Ring of Fire, or worldwide activity, Fulcanelli helps you stay informed about what’s happening on and around Earth. Features • Live earthquake feed and map • Magnitude and geography filters • Seismic ripple markers with magnitude labels • Space weather layers and dashboards • Daily Earth Intelligence briefings • Alert preferences for quakes and environmental activity Data sources include USGS and NOAA. Location is optional and only used to show you on the map when enabled.
Screenshots
Verdict
The clearest difference is update cadence: Fulcanelli at every 5 days against Adopt's every 40 months. On price, rating, ratings volume 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for Adopt against 5.0 for Fulcanelli. Both are backed by a comparable volume of ratings — 1 and 2 respectively.
Adopt ships an update every 40 months, Fulcanelli every 5 days. The most recent releases landed on September 26, 2026 and October 5, 2026 respectively.
| Parameter | Adopt | Fulcanelli |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (2 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 | 2 — better |
| Update frequency | Every 40 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.5 | 17.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Frederik Simons | mark hendrickson |
Customer experience
Adopt
Fulcanelli
In-app purchases
Adopt
No in-app purchases
Fulcanelli
No in-app purchases









