Talk. It moves.
The page advances only while you’re speaking, at your pace.
In active development. Features subject to change.
Stop fighting
the scroll.
Castline is the teleprompter that follows your voice. The page moves when you do. Coming soon to iPhone.
Get notified
Coming soon
Coming soon
to iPhone.
Join the list and we’ll email you when it’s ready to download.
One email when Castline is ready for iPhone.
The first 10 signups also get a TestFlight beta invite by email when the beta opens.
Now
Follow, scripts and recording, in active development builds.
Before launch
Plans and pricing, shared with the list first.
Next
Castline launches on iPhone.
Castline is in active development. Features, design and availability shown here are subject to change.
Follow
Five ways it keeps up.
With Follow on, Castline listens to your pace and matches your words to the script, so the page moves under the amber reading line as you speak.
Pause. It waits.
Breathe, think, land the line. The script stays put.
Go off script. It holds your place.
Ad-lib as long as you like. Come back and it picks up.
Skip a line. It catches up.
Start a later line and the page scrolls forward to meet you.
Flub a line? Say it again.
Castline comes back with you, without jittery jumps.
Just one amber reading line. No flashing words, nothing extra to track. Your script sits where your eyes need it. Prefer a classic prompter? Set your own scroll speed instead.
Features
Built for the take you actually want.
Record while you read
Capture your take with the script on screen, up to 4K, saved straight to Photos.
Start from a draft
Paste, import, or begin with an AI-written script, then rewrite until it sounds like you.
Classic scrolling
A steady scroll at the words-a-minute you set, with adjustable text size.
Remote control
A Bluetooth keyboard or page-turner, or another iPhone. No internet or account needed.
Rig mode
Mirrored text for teleprompter glass, with controls kept out of the way.
FAQ
Good questions.
When can I get Castline?
Castline is coming soon to iPhone. Join the list and we’ll email you when it’s ready to download.
How does Castline follow my voice?
With Follow on, Castline listens to your pace and matches what you say to your script. The page moves under the amber reading line while you talk and waits when you pause.
What if I ad-lib, skip, or flub a line?
Go off script and Castline holds your place until you come back to your words. Skip a line and it catches up. Say a line again and it comes back with you.
Still curious? [email protected] · Need help? Visit Support