A teleprompter that uses the devices you already own. No account, no cloud, no subscription.
Write the script on the Mac, read it on the iPad, control it from your phone. Any of the three devices can be the editor, the viewer or the remote, and you switch whenever you want.
It also works on a single device: write, switch to the viewer and read. Nothing else needed.
On the device hosting the session, open Connect and turn on Open in a browser. An address appears: anyone who types it on a laptop or phone on the same network can read and control it just the same. A browser can join a session but cannot host one.
Both have to be on the same network, and the app needs Local Network permission. On iPhone and iPad it is in Settings → Universal Teleprompter. If your network blocks automatic discovery, type the address by hand: the host shows it under Connect.
Speed is worked out from what the viewer measures. If no device is in viewer mode there is nothing to measure: open the viewer somewhere and the duration appears on its own.
That is what a real teleprompter rig does. Turn on Horizontal mirror in the viewer settings. If the iPad also hangs upside down, turn on the vertical one too.
Write to hello@rackslabs.com and I will get back to you.
If it is a bug, say which devices you were using and which mode each one was in: that is usually enough to reproduce it.