I literally use Textastic every day for a huge amount of work (iPad Pro). It is, by far, the best coding tool I’ve used.
When coding, however, one of the most fundamental things is being able to undo a lot of test work. I don’t know what the current undo level is but it’s not anywhere close enough. I would, at least, provide an option to increase the step number. To 50, 100, 500… whatever the memory will allow.
Customer support service by UserEcho