diff --git a/index.php b/index.php
new file mode 100644
index 0000000..43c4521
--- /dev/null
+++ b/index.php
@@ -0,0 +1,18 @@
+<?php
+$host = $_SERVER['HTTP_HOST'];
+$type = $_POST['type'];
+
+if ($type == "tex") {
+  move_uploaded_file($_FILES["file"]["tmp_name"], "tmp.tex");
+  $output = shell_exec("latex -interaction nonstopmode tmp.tex");
+  echo "http://$host/tmp.dvi";
+}
+
+if ($type == "dvi") {
+  $dpi = isset($_POST['dpi']) ? intval($_POST['dpi']) : 200;
+  move_uploaded_file($_FILES["file"]["tmp_name"], "tmp.dvi");
+  shell_exec("dvipng -D $dpi -T tight -bg Transparent -o tmp.png tmp.dvi");
+  echo "http://$host/tmp.png";
+}
+
+?>
diff --git a/public/index.php b/public/index.php
deleted file mode 100644
index fb6d41b..0000000
--- a/public/index.php
+++ /dev/null
@@ -1,10 +0,0 @@
-<?php
-move_uploaded_file($_FILES["file"]["tmp_name"], "tmp.tex");
-$dpi = isset($_POST['dpi']) ? intval($_POST['dpi']) : 200;
-$output = shell_exec("./tex2png.sh tmp.tex $dpi");
-
-if ($output !== null) {
-  $host = $_SERVER['HTTP_HOST'];
-  echo "http://$host/$output";
-}
-?>
diff --git a/public/tex2png.sh b/public/tex2png.sh
deleted file mode 100755
index 73ba76b..0000000
--- a/public/tex2png.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/bin/sh
-file="$1"
-dpi="$2"
-[ "$file" ] || exit 1
-out="${file%.tex}.png"
-
-makepng() {
-    latex -interaction nonstopmode "$file" >/dev/null 2>&1 || return 1
-    dvipng -D "$dpi" -T tight -bg Transparent -o  "$out" "${file%.tex}.dvi" >/dev/null 2>&1 || return 1
-}
-
-makepng && echo "$out" || exit 1
diff --git a/texpngweb.el b/texpngweb.el
index d5a9183..7faaeb9 100644
--- a/texpngweb.el
+++ b/texpngweb.el
@@ -3,13 +3,13 @@
 (if (eq system-type 'android)
   (progn ;; Android custom org-latex-preview
     (setq org-preview-latex-process-alist
-          '((texpngweb
-              :programs ("curl")
-              :description "tex > png"
-              :message "you need to install curl."
-              :image-input-type "tex"
+          '((dvipngweb
+              :programs ("latex" "dvipng")
+              :description "dvi > png"
+              :message "you need to install the programs: latex and dvipng."
+              :image-input-type "dvi"
               :image-output-type "png"
               :image-size-adjust (1.0 . 1.0)
-              :latex-compiler ("")
-              :image-converter ("curl -F \"file=@%f\" -F \"dpi=%D\" http://0.0.0.0:8000 && curl http://0.0.0.0:8000/tmp.png -o %O"))))
-    (setq org-latex-create-formula-image-program 'texpngweb)))
+              :latex-compiler ("curl -F \"file=@%f\" -F \"type=tex\" 0.0.0.0:8000 && curl 0.0.0.0:8000/tmp.dvi -o %O")
+              :image-converter ("curl -F \"file=@%f\" -F \"type=dvi\" -F \"dpi=%D\" -o %O 0.0.0.0:8000 && curl 0.0.0.0:8000/tmp.png -o %O"))))
+    (setq org-latex-create-formula-image-program 'dvipngweb)))