Awareness, not analytics
You learn to hear and feel your own voice — which is what actually changes how you speak. Nobody built confidence by staring at a graph.
Astound vs Yoodli
Yoodli practices on an AI. Astound trains the voice you take to a person.
Yoodli is simulated practice. You roleplay a call or an interview with an AI. Astound doesn't do that. Confidence is built in the voice itself — breath, resonance, articulation — and talking to a person is a different game than talking to a machine.
A person is not a prompt.
Roleplay with an AI rehearses the simulation. The voice you bring into a real room is trained.
Astound vs Yoodli, side by side
Yoodli is an AI roleplay simulator. Astound is a voice coach.
| Feature |  | Yoodli |
|---|---|---|
| Taught by a voice coach & speech therapist | Included | Not includedAI personas |
| Breath-support training | Included | Not included |
| Physical voice work | Included | Not included |
| Tension-release stretches | Included | Not included |
| Warmups for the moment | Included | Not included |
| Recordings stay on your phone | Included | Not includedAnalysed by AI |
| A few minutes, any time | Included | Included |
| Native iPhone app | Included | Not includedWeb-based |
| Filler-word counts & speech scores | Not includedOn purpose | Included |
Try Astound for free
Free download · Premium cancellable anytime
What Yoodli can’t give you
Breath first
A steady voice sits on steady breath. Diaphragmatic breathing and breath support are the foundation of every routine.
Expert-led
Every lesson is taught by Leila Bostic, a voice coach and speech therapist with 15 years of work with teachers, doctors, managers and actors.
We don’t care about filler-words. Or graphs.
Your favourite speakers say “um” too. What they have is breath, presence, and a voice that carries. That’s what we train.
Which one is right for you?
Yoodli is built for simulated practice: interview and sales roleplays with AI personas, plus custom scenarios for teams.
Choose Yoodli if…
- You want to rehearse one interview or sales call against an AI
- Your company wants custom roleplay scenarios
Choose Astound if…
- You want confidence that lives in the voice, not in a simulation
- You get tense, breathless or quiet when a real person is listening
- You don't believe talking to an AI prepares you for talking to a human
- You want a few minutes of voice work on your iPhone
Why our users prefer Astound
4.7 stars from 1,300+ reviews on the App Store.
Simple, interesting, effective
A week into using the app, I am really impressed at how simple and effective it is: even now I already have more control over my voice in (dreaded) phone conversations!
Great for improving your speech in any situation!
I am using this app to be better at speaking with confidence and clarity for my job. I have noticed a difference in the recordings of my voice.
Questions
What's the difference between Astound and Yoodli?
Yoodli is simulated practice. You roleplay a conversation with an AI. Astound doesn't believe in that. Talking to a person is a different game than talking to a machine. Astound builds confidence in the voice itself — breath, resonance and articulation — with lessons from speech therapist Leila Bostic.
Is there a Yoodli app for iPhone?
Yoodli is primarily web-based. Astound is a native iPhone app, rated 4.7 on the App Store and featured by Apple.
Leila Bostic
Voice coach & speech therapist
A real coach. A few minutes a day. A voice that shows up when it matters.
Start your first lessonMore comparisons
AI speech scorecard
Orai prints numbers on a screen. Astound builds your awareness and confidence over time.
AI feedback app
Speeko scores the recording. Astound trains the voice that made it.
vocabulary & speaking curriculum
Wellspoken works on what you say. Astound works on how you sound.
soft-skills course platform
VirtualSpeech simulates the room. Astound trains the voice you walk in with.
weekly speaking club
Toastmasters is a club that meets once a week. Astound is a voice coach, every day.