diff --git a/.gitignore b/.gitignore
index 5d1a6776..155a5dbc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,7 @@
 assets/atom/*
 assets/render/*
 assets/global/*
+assets/manual/*
 assets/css/tagcolors.css
 assets/js/*
 database/*
diff --git a/app/class/Controllerinfo.php b/app/class/Controllerinfo.php
index 646c0ca6..15bbbf7e 100644
--- a/app/class/Controllerinfo.php
+++ b/app/class/Controllerinfo.php
@@ -21,16 +21,31 @@ public function __construct($render)
     public function desktop()
     {
         if ($this->user->isinvite()) {
-            if (file_exists(Model::MAN_FILE)) {
-                $render = new Servicerender($this->router, $this->pagemanager, true);
-                $htmlman = file_get_contents(Model::MAN_FILE);
-                $htmlman = $render->rendermanual($htmlman);
+            $version = getversion();
+            $mandir = Model::MAN_RENDER_DIR;
+            try {
+                $manual = Fs::readfile("$mandir/manual_$version.html");
+                $summary = Fs::readfile("$mandir/summary_$version.html");
+            } catch (RuntimeException $e) {
+                try {
+                    $mansrc = Fs::readfile(Model::MAN_FILE);
+                    $render = new Servicerender($this->router, $this->pagemanager, true);
+                    $manual = $render->rendermanual($mansrc);
 
-                $sum = new Summary(['min' => 2, 'max' => 4, 'sum' => $render->sum()]);
-                $summary = $sum->sumparser();
+                    $sum = new Summary(['min' => 2, 'max' => 4, 'sum' => $render->sum()]);
+                    $summary = $sum->sumparser();
 
-                $this->showtemplate('info', ['version' => getversion(), 'manual' => $htmlman, 'summary' => $summary]);
+                    Fs::folderflush($mandir);
+                    Fs::dircheck($mandir, true, 0775);
+
+                    Fs::writefile("$mandir/manual_$version.html", $manual);
+                    Fs::writefile("$mandir/summary_$version.html", $summary);
+                } catch (RuntimeException $e) {
+                    $manual = '⚠️ Error while trying to access MANUAL.md file.';
+                    $summary = '';
+                }
             }
+            $this->showtemplate('info', ['version' => getversion(), 'manual' => $manual, 'summary' => $summary]);
         }
     }
 }
diff --git a/app/class/Fs.php b/app/class/Fs.php
index 786949e5..7ef9c573 100644
--- a/app/class/Fs.php
+++ b/app/class/Fs.php
@@ -3,6 +3,8 @@
 namespace Wcms;
 
 use DomainException;
+use LogicException;
+use RuntimeException;
 
 /**
  * File system related tools. No Wcms specific param should be set here.
@@ -119,6 +121,27 @@ public static function accessfile(string $path, bool $createdir = false): bool
         }
     }
 
+    /**
+     * Read file as string
+     *
+     * @param string $path                  the file path
+     * @return string                       the file as string
+     *
+     * @throws Notfoundexception            if the diven path is not a file
+     * @throws Fileexception                if an error reading the file occured
+     */
+    public static function readfile(string $path): string
+    {
+        if (!is_file($path)) {
+            throw new Notfoundexception("The given path `$path` is not a file");
+        }
+        $file = file_get_contents($path);
+        if ($file === false) {
+            throw new Fileexception("Error when reading file `$path`");
+        }
+        return $file;
+    }
+
 
 
     /**
@@ -151,7 +174,7 @@ public static function recursecopy($src, $dst, $perm = Model::FOLDER_PERMISSION)
      * @param string $file                      Filename to delete
      *
      * @throws Notfoundexception                If file does not exist
-     * @throws Fileexception                    Id file cannot be deleted
+     * @throws Fileexception                    If file cannot be deleted
      * @throws Unlinkexception                  If PHP unlink function fails for another reason
      */
     public static function deletefile(string $file): void
@@ -167,4 +190,29 @@ public static function deletefile(string $file): void
             throw new Unlinkexception($file);
         }
     }
+
+    /**
+     * Delete all files in a given folder
+     *
+     * @throws Notfoundexception                If folder does not exist
+     * @throws Fileexception                    If a file cannot be deleted
+     * @throws Unlinkexception                  If PHP unlink function fails for another reason
+     */
+    public static function folderflush(string $path): void
+    {
+        $path = trim($path, '/');
+        $files = glob("$path/*");
+        if ($files === false) {
+            throw new Notfoundexception("Error while trying to scan directory $path");
+        }
+        try {
+            foreach ($files as $file) {
+                self::deletefile($file);
+            }
+        } catch (Notfoundexception $e) {
+            throw new LogicException(
+                'Problem with Fs::folderflush(), path given to Fs::deletefile() does not exist.'
+            );
+        }
+    }
 }
diff --git a/app/class/Model.php b/app/class/Model.php
index ffe7cafe..1d41acc0 100644
--- a/app/class/Model.php
+++ b/app/class/Model.php
@@ -6,6 +6,7 @@ abstract class Model
 {
     public const CONFIG_FILE = 'config.json';
     public const MAN_FILE = 'MANUAL.md';
+    public const MAN_RENDER_DIR = 'assets/manual/';
     public const ASSETS_CSS_DIR = 'assets/css/';
     public const ASSETS_ATOM_DIR = 'assets/atom/';
     public const COLORS_FILE = self::ASSETS_CSS_DIR . 'tagcolors.css';
diff --git a/app/fn/fn.php b/app/fn/fn.php
index 05f27425..686930a2 100644
--- a/app/fn/fn.php
+++ b/app/fn/fn.php
@@ -88,7 +88,11 @@ function isreportingerrors()
     return function_exists('Sentry\init') && !empty(Wcms\Config::sentrydsn());
 }
 
-
+/**
+ * Get W version using VERSION file in root directory.
+ * @return string                           W's current version.
+ *                                          If the file cannot be read, `unknown` is used as output.
+ */
 function getversion(): string
 {
     if (file_exists('VERSION')) {