diff --git a/public/tex2png.sh b/public/tex2png.sh
index 554f09c..b5c732d 100755
--- a/public/tex2png.sh
+++ b/public/tex2png.sh
@@ -5,7 +5,7 @@ out="${file%.tex}.png"
 
 makepng() {
     latex -interaction nonstopmode "$file" >/dev/null 2>&1 || return 1
-    dvipng -D 150 -T tight -bg Transparent -o  "$out" "${file%.tex}.dvi" >/dev/null 2>&1 || return 1
+    dvipng -D 200 -T tight -bg Transparent -o  "$out" "${file%.tex}.dvi" >/dev/null 2>&1 || return 1
 }
 
 makepng && echo "$out" || exit 1
diff --git a/texpngweb.el b/texpngweb.el
index 1eafa5a..17699de 100644
--- a/texpngweb.el
+++ b/texpngweb.el
@@ -1,17 +1,21 @@
 ;; Sample emacs configuration for this setup
+;; Adjust dpi in ./public/tex2png.sh
+;; dvipng -D 350 looks good on my device (400dpi)
 
-(setq org-preview-latex-process-alist
-      '((texpngweb
-	 :programs ("curl")
-	 :description "tex > png"
-	 :message "you need to install curl."
-	 :image-input-type "tex"
-	 :image-output-type "png"
-	 :image-size-adjust (1.0 . 1.0)
-         ;; This works in my pc, but not in android.
-	 ;; :latex-compiler ("curl -F \"file=@%f\" http://0.0.0.0:8000")
-         ;; For some reason this works in android (and also on pc)
-	 :latex-compiler ("curl -F \"file=@%f\" http://0.0.0.0:8000 && curl http://0.0.0.0:8000/tmp.png -o %O")
-	 :image-converter ("curl http://0.0.0.0:8000/tmp.png -o %O"))))
-
-(setq org-latex-create-formula-image-program 'texpngweb)
+(if (eq system-type 'android)
+  (progn
+    (setq org-preview-latex-process-alist
+          '((texpngweb
+              :programs ("curl")
+              :description "tex > png"
+              :message "you need to install curl."
+              :image-input-type "tex"
+              :image-output-type "png"
+              :image-size-adjust (1.0 . 1.0)
+              ;; This works in my pc, but not in android.
+              ;; :latex-compiler ("curl -F \"file=@%f\" http://0.0.0.0:8000")
+              ;; For some reason this works in android (and also on pc)
+              ;; And for whatever reason image-converter still needs to be set
+              :latex-compiler ("curl -F \"file=@%f\" http://0.0.0.0:8000 && curl http://0.0.0.0:8000/tmp.png -o %O")
+              :image-converter ("curl http://0.0.0.0:8000/tmp.png -o %O"))))
+    (setq org-latex-create-formula-image-program 'texpngweb)))