Compared
FlyGuysNLies and Rivus
FlyGuysNLies and Rivus are two of the most similar fly fishing apps you’ll find. They both read a river’s live conditions into a straight call on how it’s fishing. They both hand you the hatch and the flies to match for the water you’re headed to. The main difference comes down to one thing, and it goes to Rivus. It’s Eddy, a fishing companion that reads the water alongside you and helps you adjust when the fish aren’t playing by the numbers.
What FlyGuysNLies does well
FlyGuysNLies rates each river from Excellent to Unfishable off live flow, water temperature, trend, and history, updated through the day, and it pairs that verdict with hatch charts and rig recommendations down to leader and tippet, for 180 rivers across Colorado, Wyoming, Montana, Utah, and New Mexico. It’s genuinely close to what Rivus does.
Where the data runs out
Both apps read live conditions into a call, and both are good at it. But conditions change, and some days the data can’t keep up. The flow’s right, the hatch is on, the verdict says go, and the fish still say no. That’s the moment an app of numbers leaves you on your own.
Eddy reads the water with you
That’s where Eddy comes in, and it’s the one thing no other app has. Eddy’s in the water with you, reading conditions as they shift and helping you adjust when the fish won’t cooperate with the forecast. It already knows your water, your flow, your temperature, your hatch, and how the morning’s actually gone. So you’re not briefing a blank chatbot before you can ask a real question. You just ask, the way you’d ask the person next to you who’s fished this water a hundred times.
The rest, and which one for you
Beyond Eddy, Rivus reads your exact stretch instead of the river as a whole, fishes from your own box instead of a library, and covers trout water across 36 states and growing, not five. If you fish those five western states and want river-level verdicts, FlyGuysNLies is a fine call. But if you want a read that keeps thinking with you when the fish stop cooperating, that’s Rivus.