tiny Lisp ISLisproid

tiny Lisp interpreter system on Android.
Shell like user-interface is used.
In ver 3.0, the history facility is added.
In ver 4.0, Android functions are supported(TOAST, DigitalClock).
In ver 4.1, load like (load "test.lsp") and (save "test.lsp" "(defun foo () 123)") is supported.
In ver 4.3, the string type is supported.
In ver 5.0, load/save from/to an external storage are supported.
For Example,
test.lsp in /mnt/sdcard/info.gomi.android.lisp.islisp/
(defun foo ()
123)
(defun bar (x y)
(cons x y))

In ver5.1, if there is a start.lsp, it is loaded in start.
progn is supported.
You can insert a new line in S-exp of file.

---
Built in functions are;
car cdr cons list consp set-car set-cdr length
+ - * / = >= <= > < numberp
setq defun if eval eq quote
symbol-function set-symbol-function
oblist funlist
toast clock
load save
stringp symbol-name
progn
print prin1 princ terpri
(written in Java)
equal eql zerop not append
(written in S-expression)

demonstration programs are;
tarai tak hanoi

P.S.
The other android widget "Lisp Joke Widget", please.