When you type, you watch your thumbs, and a full keyboard has earned its space. When you talk, you read every word back, looking for the one it misheard. That's when you need the page most, and it's exactly when a full keyboard hides the most of it.
Speaking Of trades fifty letters for one slim row. What's left is your text, with room to read it.
38%of an iPhone Air's screen under the standard keyboard
16%under Speaking Of, with the same row of Apple's buttons below
≈ 9more lines of your own words on screen
Keep both. One tap of the globe switches between them, instantly: Apple's for typing, this one for talking.