When comparing RoboVoice vs Speech Central, the Slant community recommends Speech Central for most people. In the question“What is the best text to speech software for Windows?” Speech Central is ranked 5th while RoboVoice is ranked 9th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Package- and subscription-based prices
No monthly fee if you don't use it frequently.
Pro Direct use of the synthesized audio files in other programs
After you have entered the text to be synthesized, you can immediately use the converted audio in your editing program via drag & drop. No need to download the files from a website and import them manually.
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.
Cons
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.