Where KeySay is strong
KeySay's appeal is simple: a focused voice keyboard with privacy-forward messaging and a low-friction layout. That is the right benchmark for any iPhone dictation keyboard.
Where TypeVoice goes further
TypeVoice adds a live draft preview, AI polish after the pause, Original / Light / Structured / Formal rewrite modes, hold-to-translate, vocabulary, snippets, and a normal keyboard surface for quick edits.
Choose based on the final text
If you mainly want raw voice-to-text, a minimal keyboard can be enough. If you want text that is ready to send in Mail, Messages, Slack, ChatGPT, and Notes, TypeVoice focuses on the cleanup layer.