If you're looking to Download Mx. Prompter+ on your Chromebook laptop Then read the following guideline.

Text input speech Supports smart speech based on the manuscript. You can enter up to 10,000 characters per speech document and support production in four different modes. 1. Screen tap Tap the iPad (iPhone) at hand to advance the section of the speech manuscript. 2. Earphone operation Use the buttons on the earphones to advance the speech manuscript section. Wireless earphones via Bluetooth are available. 3. Camera shutter remote control Use the shutter remote control for the iPhone (iPad) camera to advance the speech manuscript section. An inexpensive commercially available Bluetooth remote controller (volume control type) can be used. 4. Timer Advances the section of the speech manuscript at the set time interval. - Voice support The speech manuscript can be read aloud as the section progresses. The reading requires the same language setting as the speech manuscript and supports 27 languages. (There is no translation function.) - Screen characters 
Set the font, text color, background color, etc. of the manuscript text on the speech execution screen. - Reversed display When used as a prompter using a mirror, the display can be inverted (up / down or left / right). - Import / Export Speech manuscripts can be imported from iCloud or exported to iCloud. Reading support language; Arabic, Czech, Danish, German, Greek, English, Spanish, Finnish, French, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Dutch, Norwegian, Polish, Portuguese, Romanian, Russian, Slovak, Swedish, Thai, Turkish, Chinese