
Troutline
Flows, water temps and alerts
1 ratings
Free
In-App Purchases
About
Troutline puts the numbers that decide a fishing day in one place: what the river is running, how warm the water is, what the weather does next, and when the fish should be on.
It covers more than 370 rivers, creeks and lakes in 24 states, from the Kenai to the Battenkill. Each water pulls from USGS and state gauges, NOAA river forecasts, the National Weather Service, snow survey sites and state stocking reports, and turns them into a call you can make from the truck.
ON EVERY WATER
• Live flow and water temperature from every gauge on the river, with the last 7 days on a chart, the normal range for the date on USGS gauges, and NOAA's forecast where there is one.
• Weather, wind, barometric pressure, air quality, sun and moon, all in the water's own time zone.
• Reservoir levels and dam releases on tailwaters, like the Green below Flaming Gorge and the Fryingpan below Ruedi.
• Recent and upcoming hatchery plants from state fish and wildlife agencies.
• Snowpack and the seasonal runoff forecast on snowmelt rivers.
• The Guide tab: the reaches worth fishing, the species, the wading flows that fish best, access, regulations, and local fly shops and guides.
• Fishing reports from local fly shops, with a link to the full report on the shop's site.
THE 5-DAY FISH INDEX FORECAST
The Fish Index rates each day for trout from Poor to Prime, from the flow or wind, water temperature, weather, pressure and moon. Today is split into morning, midday and evening windows, and the best one is named. Swipe through the next 5 days, each with the reasons behind its rating.
MY WATERS AND ALERTS
Save the rivers and lakes you fish and see them on one board, best first, with the last week and the days ahead. Set an alert on flow, water temperature, the Fish Index or a stocking, and get a push and an email when your water gets there.
THE LOGBOOK
Log an outing in a minute: the water and reach, flies, fish and sizes, notes and photos. Troutline adds that day's flow, water temperature, weather and Fish Index for you. No signal at the put-in? The outing waits on your phone and posts when you are back in range. Group outings into trips, and keep any of them private.
COMMUNITY
Find anglers by name or by the waters they fish, follow them, and see their public outings. You choose whether you show up in search.
TROUTLINE PREMIUM
A free account gets full conditions on every water, the 5-day Fish Index forecast, 3 saved waters, 1 alert and the logbook. Premium adds:
• History: up to 10 years of flow, water temperature and gauge height on USGS and most state gauges, past years laid over this one, and the Fish Index by month.
• Compare: up to 4 reaches from any rivers and lakes on one chart, over any dates in the record.
• Unlimited alerts, with up to 5 conditions in each.
• Every water you fish saved on your board.
• The runoff outlook on snowmelt rivers, and steelhead and salmon ratings with the storm outlook on coastal rivers.
Premium is an auto-renewing subscription, billed monthly or yearly, with a free trial for new members. Payment is charged to your Apple Account when you confirm. It renews unless you turn it off at least 24 hours before the period ends. You can manage or cancel it in your App Store account settings.
Troutline needs an account. Sign in with Apple or your email.
Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://troutline.co/privacy
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What's New in Troutline
1.0
November 9, 2026
2
Subscriptions & In-App Purchases
Troutline Premium
Runoff + storm outlook, history, compare and alerts.
$9.991 Month
14 Days trial








