Fixes an issue that could leave the app on a blank screen after opening.

Billing fixes. A monthly renewal can no longer downgrade a Lifetime purchase, your lessons unlock right after you buy instead of waiting for a restart, and a purchase made after signing out and back in now reaches your account.

• New lessons now introduce every word before it appears in a check — a quick "Meet the words" look comes first. • Wrong answers in checks now show you the word and its meaning, so every guess teaches. • Small fixes and polish.

• Level check improved: answer order is now randomized and results are more reliable. • Fixed a freeze at the end of the level check. • Speech features now connect reliably. • Small fixes and polish.

• Audio loads faster and more reliably, worldwide. • Small fixes and polish.

A guided welcome, and a voice tuner you can trust. • A short welcome now shows you how Sabai works — and asks whether you're learning Thai or helping someone learn (coaches get their own start) • Voice tuning rebuilt: it waits for your voice, ignores room noise, shows the level it measured, and plays the tones in YOUR range so you can hear what it learned • Hear your own attempt next to the target in tone practice, with a coaching tip every time • Clearer placement: honest about its length, a sound check before listening questions, and a plain explanation of what your result changed • Clearer lesson icons across the early levels, and machine-drafted extra practice now sits apart from the hand-finished path • Honest labels everywhere: what's reviewed, what's still in preview, and exactly what Premium includes

• Fixed an issue that could leave the app stuck on the opening screen. • Smaller, faster download. • Sign in with Apple or Google. • Stability and performance improvements.