DriftR

Bitterroot River · Painted Rocks → Missoula

River

Find a fishing access site

Map style

Messages

Saved plans

Put in Take out

Launch Float date

Fishing pace

Be off the water by Stops (min)

“Normal” compares today's flow with a typical value for the month (rounded long-term averages). Water temperature shows only where USGS measures it at that gauge.

Tap any access point on the map, or pick one below, for directions, sharing and put-in / take-out.

Trip

Fishing time

What you saw

Fish caught

＋ Log a fish on this trip

Which float? When

Species Length (in)

Fly or lure Method

Notes

Fish photo Fly / lure photo

Your trips

Fly details (optional, but they make the advice better)

FlySize

ColorDepth

Seeing anything? Add a note if you like, then tap one.

Press and hold anywhere on the map to add a hazard, a navigation aid (stay left / right / center, scout, portage), a point of interest, or your own access site. Tap anything on the map, or in this list, to see it, edit it or remove it.

Only what's on my planned float

Share with a buddy

Sends a small file by text or email. They save it, then tap Import here.

River

Include

Tick as many as you like.

Hazards Navigation aids Points of interest (honey holes, notes) Your access sites Your name (so they know who it's from)

Import

When

Hazard Severity

Notes

Hazard photo

Log real trips and the planner learns your pace. After a few trips, estimates scale to how you actually fish.

Date Actual launch Actual take-out

Uses the put-in and take-out on the Plan tab. Forgot to note the times? Your best guess is fine.

Minutes spent just rowing out at the end

Ask Riffle

ID a bug (photo)ID a fly (photo)

What's hatching

My fly box

FlySize

Developer tools for testing and tuning the planner. Turn them off in Settings › Advanced.

Speed samples

Take short samples instead of recording a whole float. Drift: oars up, just floating with the current, for 5–15 minutes. Row: rowing downstream at your normal take-out pace for 5–10 minutes. Drift samples tune how fast the river moves at each flow; row samples tune the “rowing adds” setting.

Build chat

Opens the Claude conversation where this app is built, so you can ask for changes there.

Open the build chat

Status

Data source check

Tests each online data source this phone can reach (flows, water temperature, flow history, weather).

River line and roads

Reload the river line and roads (OpenStreetMap; needs a connection) · Export river & roads · Import river & roads

Errors

Send to Claude

One file with your trips, recordings, notes, settings, errors and check results. Attach it in the Claude app.

Settings

Sync across devices

Floating

Rowing adds (mph)

How much faster you go when you stop fishing and row out, on top of the current. Used for “stop fishing by” times. Default 1.5.

Alert sound for hazards and navigation aids in Float mode

Riffle (AI fishing guide)

Help

Sends the app version, your phone type and recent error messages (no trips, fish or locations) so a problem can be tracked down.

Backup and export

Import backup

Backups include photos and can be imported on another device. Fish and trip CSVs open in any spreadsheet.

Your data

Help & support Privacy policy