Y'all, there are accessibility programs for text-to-speech that can be used instead of this guy's stuff. In fact, every phone and every operating system comes with them. As a disabled person who uses text to speech, I find it's much better to use the following that's built into operating systems and/or privacy-oriented extensions for browsers.
Just so y'all know, I did not include any AI TTS software such as Voice Dream, TTSMaker, and Natural Reader since those require uploads to convert to speech. Below is apps and settings that function fairly well, and do not use uploads (as they are locally converted on your device).
For Microsoft suite, there's a read-aloud option in the immersive reader view in Edge, docs, and other tools. In any document, click View > Immersive Reader, and then press the play button that appears. It comes with a variety of options.
Firefox, Opera, Chrome, Safari, and other browsers also have read aloud options built in, but there is also the excellent Read Aloud extension that I've used at times. The great thing about Read Aloud extension is that's it's built for privacy too -- as the synthesis of turning text to speech is done locally on your computer and not through online servers. You can even use it to read PDF documents in your browser tab; I've tested it and it works well for AO3 fanfics.
Android has a Select-to-speak option that I've used. This is found under Settings < Accessibility. Once activated, you can then click on the text you want spoken and options will come up. It's customizable with a variety of voices.
Every Apple device comes with Spoken Content feature. This feature has a wide variety of options, and its speak selection option will speak the content of a webpage, eBook, or whatever through the use of keyboard shortcuts. You can find this feature under Settings < Accessibility. It functions similarly to the Android select-to-speak.
Ice Cream eReader has TTS options as well, but it's a Windows / Android program. You open the eBook file in it, and can use the settings to turn on the TTS. As it's local to your computer, it can be used offline.
Balaboka is another option for Windows users. It's a program you install in Windows, and it has a pretty robust set of features and customization. It also reads a variety of files, and can produce an sound file in a variety of formats. Since it's on one's computer, it doesn't necessarily need Internet connections to function (though you can use it to read websites too).
Various eReaders like Libby or Kobo also have built in text to speech options under their settings (usually listed in accessibility part of settings).
Moonreader has TTS options in its settings. I use Moonreader a lot, and find it does a good job with its TTS options. It's free to use, though you can buy it to access extra features. (Buy once, no subs.) It's usable on most devices, though I've never tested it on Apple Devices. I use it mostly on Windows or Android. It can be used offline or online.
Calibre is a robust eReader that also has TTS options in its settings. It has a wide variety of options and voices for its TTS. This is an open-source project and also free to use. You can use it on Windows, Linux, Mac, portable usb drives, android, or apple devices. It can be used offline or online.
Screenreaders are more comprehensive than TTS. While TTS tends to focus on the text only, screenreaders can also read menus, emojis, links, spreadsheets, taskbars, etc. Screenreaders are commonly used by those with limited eyesight or are blind. They may also be used by people who may find text read out loud easier for navigation or understanding the content.
Again, all operating systems and mobile phones have screenreaders available in the Accessibility settings. All of the built in screenreaders have multiple language options.
For Mac/Apple, Voice Over does a great job and is the most popular screenreader for those using Apple Products. It's built into all Apple devices.
For Linux, there's the Speakup app, which does a pretty good job at screenreading.
NVDA is an opensource project by disabled people and it's free! It's one of the best screenreaders I've used. It has a lot of great features, plus it's portable! You can put it on an USB Stick and then use it on any computer. It has a wide range of languages too.
Chrome has a screenreader extension. I've never tested it but some disabled folks I know like it.
Firefox has several screenreader extensions. Fire Vox is one of the more popular ones as it also has TTS functionality too. It uses keyboard shortcuts to activate it, and has various customization features to tailor it to a person's needs.
Point is, do your research on the options out there. There's a lot of free TTS and screenreaders that can do a better job than Weitzman's Booktoapp and speechify. The ones I highlighted above are all free plus they don't steal people's works.
On a related note: If you need a speech to text option, all of the above operating systems and browsers have that built into their accessibility menu. If you have money to spend, the Dragon Software Suite is what's used by professionals for dictation and comes with built in privacy and extensive features.
