Chlorofishy vs. Terrafin
Terrafin is $119/year for a new subscription ($109/year to renew) and covers 200+ regions with a mobile app included. Its own FAQ says chlorophyll data is about 18 hours old when they receive it, with one usable satellite shot a day. Chlorofishy is $49-$89/year, publishes a chlorophyll composite at roughly 12-14 hours of latency, and shows the named raw pass behind every reading.
Prices and features verified 2026-08-25.
Feature matrix
| Feature | Terrafin | Chlorofishy |
|---|---|---|
| Price | $119/year new, $109/year to renew | $49-89/year or $9-15/month by region scope |
| Chlorophyll data age | About 18 hours old on receipt, per their own FAQ; one usable shot per day | Roughly 12-14 hours latency for the composite |
| SST updates | Twice per day per their FAQ | New passes checked every 10 minutes, around the clock |
| Coverage | 200+ regions: continental US, Hawaii, Alaska, Mexico, Caribbean, Central America, Venezuela, Brazil | 38 regions worldwide, composites unscoped for everyone |
| Named raw satellite passes | Not described; offers cloud-free blended and daily composite charts instead | Yes, per-pass sensor, capture time, and native resolution |
| Altimetry, currents, bathymetry | Yes, included with the subscription | No |
| Mobile app with offline charts | Yes, iOS/Android, included; download while you have signal, view offshore. Also marks waypoints and vessel position | No, web only |
| Monthly billing | Not offered on the pages we could read | Yes, on every tier |
Terrafin figures from terrafin.com/sstview/order.php, terrafin.com/sstview/faq.php, and terrafin.com/sstview, checked 2026-08-25. Chlorofishy figures from pricing and data sources.
Choose Terrafin if
You want the widest coverage in this category by far (200+ regions from Alaska to Brazil, versus our 38), altimetry, currents, and bathymetry contours bundled into one subscription, and a mobile app that lets you download charts before leaving the dock and read them offline once you have no signal.
Choose Chlorofishy if
Fresher chlorophyll matters to you: Terrafin's own FAQ concedes their chlorophyll data is about 18 hours old with one usable shot a day, while our composite runs at roughly 12-14 hours. You also want to see the individual named satellite pass behind a reading, monthly billing, and a lower price at every published tier, though we don't offer altimetry, currents, bathymetry, or an offline mobile app.
See the actual satellite pass, not just a chart.
14-day free trial, $0 today. Cancel any time before day 14 and you won't be charged.
See how we compare to Hilton's Realtime Navigator, or read how old is the data on your SST chart for how we measure latency. Back to Compare.