KoeLab - Japanese Diction

'I mumble.' 'Sorry, what?'—change it, privately. Read aloud and KoeLab finds your weak sounds. Recordings never leave your device. Come experiment with your voice.

"I mumble." "People keep asking me to repeat myself." "I just can't like my own voice." You can change all of that—privately, at your own pace.

KoeLab is a diction training app for speaking Japanese more clearly. Just start by reading a phrase aloud. The app analyzes your voice objectively and shows you exactly which sounds you struggle with. Once you can see the weak spots you never noticed, all that's left is to practice them—again and again. The more you keep at it, the more those tricky sounds loosen up, and your voice starts to land.

And all of it happens entirely on your device. Your recordings are never sent anywhere.

■ Start by getting to know your own voice We can't hear our own voices accurately. KoeLab analyzes your pronunciation from the sound itself and makes your weak sounds and habits visible. Turning a vague "my speech is unclear" into a specific "this sound is weak" is the first step toward improvement.

■ Anytime, as much as you like, over and over Training is the heart of this app. With no time limit, read one phrase after another to build up your voice. Each round is short, so it's easy to fit into spare moments—and the more you continue, the smoother your weak sounds become. Right after scoring, you can play back your own voice and compare.

■ Find your weak sounds, then focus in The app automatically picks out the sounds you keep stumbling on. One tap drops you into focused practice for just that sound, so you can target your weak points and improve efficiently.

■ Your only rival is your past self No comparisons with others, no rankings, no social sharing. No daily quotas or streaks pushing you along. Just time to face your own voice, at your own pace.

■ Scored on four axes Your voice is scored from multiple angles across four axes: mora accuracy, articulation clarity, prosody, and listenability. An optional "Pa-Ta-Ka" test also lets you self-check for signs of oral frailty.

■ A positive picture of your voice From your acoustic features, KoeLab highlights the good in your voice—"bright and carrying," "soft and warm," "rich and resonant," and more. It never assigns negative labels.

■ Vowel target practice Aim for the "a / i / u / e / o" targets and watch your pronunciation visualized in real time, so you can adjust as you go.

■ Script practice mode Paste in a presentation or speech script and the spots with your weak sounds are highlighted—so you can rehearse just the places you're likely to trip over before the real thing.

■ Watch yourself change Score trends, shifting weak points, and side-by-side playback of past and present recordings. The more you repeat, the more your progress stays on record.

■ A gentle nudge when you want one (optional) Upbeat messages invite you back to training—loosely. Whether to turn them on is entirely up to you.

■ Who it's for ・Anyone self-conscious about their diction or pronunciation ・People who speak in public and want a voice that carries ・Anyone hoping to prevent oral frailty ・Anyone working on articulation or pronunciation self-care ・Everyone who simply wants to know their own voice objectively

■ Supported languages Japanese / English / Korean

■ Privacy Your recordings are processed entirely on your device and are never sent off it. No account required. Requires iOS 17.0 or later. Microphone and speech recognition permissions required.