How to Convert Audio to Text on an iPhone Tip: need to extract text from an image on iPhone? Follow these easy methods. SpeechTexter is another free multilingual speech-to-text assistant and is more than 90 percent accurate, depending on the language and the speaker.ĭownload and install either app, then tap the 'Microphone' button to start transcribing. If you're looking for more than a keyboard, Speechnotes provides voice typing, auto-save capability, and an instant translator, all for free.