Which devices does TonePerfect work on?
TonePerfect runs on iPhone and iPad (App Store), Android (Google Play) and the web at web.toneperfect.app, and the free tests on toneperfect.app work in a phone or desktop browser once you allow the microphone.
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All you need is a microphone; the built-in one on a phone or laptop is enough. Record in a quiet room, close to the microphone.
The browser tests need no install and no account. Chrome extensions for Chinese, English, Japanese, Korean and French let you highlight a word or sentence on any web page and practise saying it on TonePerfect's practice page.