This is great. BASIC was my first programming language on a TI-92 calculator. It provides an invitation to new would-be programmers to explore writing code. Having it available on Android just opens the door for more people to try.
But yes, being unaware of the 89, I was talking about the Z80 calculators that make up the rest of the TI-8x range, which are still used in schools to this day, which are programmed in a rubbish version of BASIC called TI-BASIC. It sucks. The 68k calculators, like the 89 and the nspire are programmed in a completely different and much better version of BASIC. This is also called TI-BASIC. This leads to much confusion, and to make it worse, there is a third TI-BASIC, which is also completely different, and was used in the computers made by TI.