Revue the PooH
The review page of this app has deteriorated over time to the point where reviewers cannot even find the master volume control. (It is, strangely, but not invisibly, on the "Effects" page.)
Far from "total crap" or "just a piano" (an odd choice for an insult, and wrong), this remains the reference voice-synth app on platform - especially given its relatively modest price. There are lately new contenders that take different approaches. One comes from the same developer, which offers the user a simpler approach to this genre. Another comes from Wolfgang Palm, bring more control to the user, which usually means people complain there is something to learn. Both apps cost substantially more than this one. And there are others that have their own stories - usually turning out that the apps are either not as good as this app or they cover different synthesizer fields and only touch on vocal/formant synthesis.
The main complaint here is that development has been very slow - with no updates for one long stretch. That primarily hurt interoperability, but not cripplingly so. Having caught up a bit, one hopes VirSyn will do better at maintenance of all their apps going forward.
Note, this complaint about maintaining, fixing, and refining apps for this platform applies to a lot of synthesizer (and other) developers. Doing the work, however, keeps products alive and viable in the market (here, the App Store) and makes for happy customers who buy more of your products.
If you need a voice synth on your pad, or even if you do not (like essentially everyone), and you are willing to fool around with the app until you understand it, this is well worth buying. It may not please everyone who demands that every type of workflow be accounted for by each app. To me, if I need to copy a recording to another app, I am fine with it, even if I often use Audiobus or whatever else. Others may be more demanding about conveniences.
That said, it is very hard to do better in this specific category. The app balances control and ease of use well, it sounds very good indeed (this developer may be relied on for rich-sounding synths - where there is ever a problem it is either in maintenance or/and UI (Poseidon, for example, cries out for more and better control)), and it has a generous assortment of "voxels" (phonemes and phrases) to help users begin sculpting sounds.
mrdogheadSHoGoAT about
iVoxel, v2.9.1