Mobile app
Tight Loop
Film a fly cast with your phone. Tight Loop draws your rod tip path on the video, names the fault, and shows yesterday's cast as a ghost under today's.
- Record or import a cast and see the rod tip path drawn over the video
- Faults named in a caster's own words, such as tailing loop, creep and wrist break
- A ghost of a previous cast under today's, and a progress card to share
- Send a clip to your instructor; they draw and talk on it and it comes back
- A Loop lab for seeing how each fault changes the loop
- Eight languages, everything on the phone, free for three casts and then $4.99 one time
Coming soon. Tight Loop is not released yet. This page is published early so its support and privacy information is available. Choose Notify me to get one email when it launches, and nothing else.
Screens
Select a screen to see it larger.
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Recording, with framing checks before you cast 
Recording, with framing checks before you cast -
The trace and the loop score 
The trace and the loop score -
A fault, named and explained 
A fault, named and explained -
Yesterday's cast as a ghost under today's 
Yesterday's cast as a ghost under today's -
Sending a clip to your instructor 
Sending a clip to your instructor -
A progress card to share 
A progress card to share
Casting instruction has always depended on someone standing beside you. Tight Loop puts the instructor’s eye in your phone. Film a cast, and the app tracks the rod tip through the video, draws its path, and names what it sees the way an instructor would: a tailing loop, creep, a wrist break, a soft stop.
See the change
Yesterday’s cast plays as a ghost under today’s, so you can see whether the loop actually tightened. A progress card captures the trace and the score to share. The Loop lab lets you bend the tip path yourself, add creep or open the wrist, and watch the loop it tends to make.
With an instructor
If you have an instructor, you send them the clip. They draw and talk on it and it comes back annotated. Fly shops and guides can have a branded version of the app from the same code.
Everything runs on the phone, in eight languages. The first three casts are free with no clock running; after that it is a single purchase of $4.99. Details and the help articles are on the Tight Loop website (opens in a new tab).
Accessibility and standards
What Tight Loop is built and checked against, in plain words. These are our own checks, not third-party certifications. About these standards.
- Multiple languages
- The interface is translated, and dates, plurals and layouts adapt to the language. Each product page lists its languages.
- Works offline
- Every main task works in airplane mode after the first install. Nothing waits on a server to let you do your work.
- No data collection
- The app gathers nothing about you: no analytics, no advertising identifiers, no tracking, and no server of ours. Its App Store privacy label is Data Not Collected.
Questions about Tight Loop
Is Tight Loop on Android?
Yes. Tight Loop runs on iPhone, Android and in a web browser, and the analysis runs on the device in each case. The free three casts and the one-time purchase work the same on every platform.
Does the app need a special camera or a tripod?
No. Film with the phone you have. The record screen checks that the caster is found, large enough in frame, level and not backlit before you start, and you can also import a video someone else filmed.
Can my instructor see my casts?
Only the clips you choose to send. Everything else stays on your phone. When you send a cast, the instructor gets the video, the trace, what the app saw and your message; they draw and talk on it and it comes back.
What does Tight Loop cost?
The first three casts are free with no time limit. After that it is a single purchase of $4.99, with no subscription. Fly shops and guides can have a branded version from the same code.