Can't roll your R?
You're not alone.

Yes. The app uses real-time voice analysis to decide whether what you just produced was a rolled R or not. It will tell you "yes" the first time you actually get one — and tell you "not yet" until you do.

Every language with a rolled R. The detection is purely about the sound, not the word. So Spanish "perro", Italian "carro", Portuguese "rato", Russian "рыба", or just a standalone "rrrr" — all work the same.

Altrillio is designed for adults learning a language. It's intended for users 13 and older. It is not speech therapy and not a medical device — if you're concerned about a child's speech development, please consult a licensed speech-language pathologist.

$9.99 one-time. No subscription. No ads. No in-app purchases. You buy it once and own it forever.

No. All analysis runs on your iPhone. You only need internet to download the app and to view this page.

It isn't muscle strength. The rolled R needs three things together: a steady stream of air, a tongue tip resting lightly behind your upper teeth, and — the hardest part — a tongue that is relaxed enough for the airflow to do the work. Most adult English speakers learn to articulate every sound with muscle effort, which is exactly what blocks the trill. Altrillio gives you the feedback loop you need to figure out the right combination by yourself.

Never. Audio is processed only on your iPhone and is never recorded, stored, or transmitted. There is no account system, no cloud sync, and no telemetry.