When comparing Speech Central vs Infovox iVox Voice Manager, the Slant community recommends Speech Central for most people. In the question“What is the best text to speech software for Mac and iOS?” Speech Central is ranked 6th while Infovox iVox Voice Manager is ranked 8th.
Ranked in these QuestionsQuestion Ranking
Pro File replication/syncing available via iCloud
Pro Available on Mac, Windows, iOS and Android
It's cross platform, but syncing only partially works for Apple ecosystem using iCloud.
Pro Good value for the money / Cheap
For $10 this app offers a lot.
Pro 30 day trial period per download
It is a luxury to be able to use a voice for 30 days in real-world use.
If you're confused when you get "This is an evaluation version of Acapella's Group' text to speech synthesizer" when using the newly downloaded/installed voice, look for the action button on the far right column for the voice downloaded/installed and in the drop-down menu click "start demo period".
Pro Has many voices in many languages
Adult, children, and some variations of the same speaker, for example Will a US American voice has from afar, up close, happy and sad variations in addition to the original voice.
Con No voices included on Android version
The app is unusable on Android unless you have voices installed under text to speech output settings.
Con No playback position syncing, even via iCloud
Even though the files replicate across Mac OS and iOS devices, the playback position does not replicate.across iCloud. Each device remembers it's own playback position, but it doesn't get synced to other devices.
Con Doesn't support images
If you have media you want to read where images or illustrations are important, this is not going to cut it.
Con Not multi-computer friendly
It is a PITA to deactivate a voice on one computer just so you can use a voice that you've purchased with your account on the same account but on a different computer in an attempt to not pay twice to use the same voice on two computers. Users have to make that choice, deal with the hassle of deactivating/activating voices or pay multiple times for the same voice for however many computers you use.
Con Have to fool around with permissions to install voice
For a supposed "manager app" it should deal with permissions by itself and not depend on users knowing how to fool around with that.
In Finder right click on the Library/Speech folder > "Get Info" > click unlock icon bottom right corner of get info window > enter administrative level credentials > give groups "Wheel" & "Everyone" Read & Write permissions > click the small gear icon and apply to all enclosed items > Install your voice(s), trial or otherwise, then set permissions for groups "wheel" and "Everyone" back to Read Only > click gear icon and apply to all enclosed items > click the lock button and reboot your computer. Voices should show up in system prefs accessibility > speech section. Might have to enable them by clicking customize.