diff --git a/www/addons/files/services/files.js b/www/addons/files/services/files.js
index b1f3c702abf..058c3a9b62e 100644
--- a/www/addons/files/services/files.js
+++ b/www/addons/files/services/files.js
@@ -26,8 +26,7 @@ angular.module('mm.addons.files')
             "itemid": 0,
             "filepath": "",
             "filename": ""
-        },
-        moodle310version = 2016052300;
+        };
 
     /**
      * Check if core_files_get_files WS call is available.
@@ -429,8 +428,7 @@ angular.module('mm.addons.files')
         siteId = siteId || $mmSite.getId();
 
         return $mmSitesManager.getSite(siteId).then(function(site) {
-            var version = parseInt(site.getInfo().version, 10);
-            return version && version >= moodle310version;
+            return site.isVersionGreaterEqualThan('3.1.0');
         });
     };
 
@@ -447,16 +445,12 @@ angular.module('mm.addons.files')
         siteId = siteId || $mmSite.getId();
 
         return $mmSitesManager.getSite(siteId).then(function(site) {
-            var version = parseInt(site.getInfo().version, 10);
-            if (!version) {
-                // Cannot determine version, return false.
-                return false;
-            } else if (version == moodle310version) {
-                // Uploading is not working right now for Moodle 3.1.0 (2016052300).
-                return false;
-            } else if (version > moodle310version) {
+            if (site.isVersionGreaterEqualThan('3.1.1')) {
                 // In Moodle 3.1.1 or higher we need a WS to move to private files.
                 return self.canMoveFromDraftToPrivate(siteId);
+            } else if (site.isVersionGreaterEqualThan('3.1.0')) {
+                // Upload private files doesn't work for Moodle 3.1.0 due to a bug.
+                return false;
             }
 
             return true;
diff --git a/www/addons/mod/assign/controllers/index.js b/www/addons/mod/assign/controllers/index.js
index b8324bd8d12..2006a438cb1 100644
--- a/www/addons/mod/assign/controllers/index.js
+++ b/www/addons/mod/assign/controllers/index.js
@@ -111,7 +111,7 @@ angular.module('mm.addons.mod_assign')
                         $scope.summary = response.gradingsummary;
 
                         $scope.needsGradingAvalaible = response.gradingsummary.submissionsneedgradingcount > 0 &&
-                            parseInt($mmSite.getInfo().version, 10) >= 2016110200;
+                            $mmSite.isVersionGreaterEqualThan('3.2');
                     }).catch(function() {
                         // Fail silently (WS is not available, fallback).
                         return $q.when();
diff --git a/www/addons/mod/assign/submission/onlinetext/handlers.js b/www/addons/mod/assign/submission/onlinetext/handlers.js
index 0b104f86546..879d0a22f4d 100644
--- a/www/addons/mod/assign/submission/onlinetext/handlers.js
+++ b/www/addons/mod/assign/submission/onlinetext/handlers.js
@@ -137,11 +137,8 @@ angular.module('mm.addons.mod_assign')
      */
     self.isEnabledForEdit = function() {
         // There's a bug in Moodle 3.1.0 that doesn't allow submitting HTML, so we'll disable this plugin in that case.
-        // Bug was fixed in 3.1.1 minor release (2016052301) and in master version 2016070700.
-        var version = parseInt($mmSite.getInfo().version, 10),
-            localMobileEnabled = $mmSite.checkIfAppUsesLocalMobile();
-
-        return (version >= 2016052301 && version < 2016052400) || version >= 2016070700 || localMobileEnabled;
+        // Bug was fixed in 3.1.1 minor release and in 3.2.
+        return $mmSite.isVersionGreaterEqualThan('3.1.1') || $mmSite.checkIfAppUsesLocalMobile();
     };
 
     /**
diff --git a/www/addons/mod/book/services/book.js b/www/addons/mod/book/services/book.js
index 15067896fc5..a237b482bf3 100644
--- a/www/addons/mod/book/services/book.js
+++ b/www/addons/mod/book/services/book.js
@@ -353,9 +353,7 @@ angular.module('mm.addons.mod_book')
         siteId = siteId || $mmSite.getId();
 
         return $mmSitesManager.getSite(siteId).then(function(site) {
-            var version = site.getInfo().version;
-            // Require Moodle 2.9.
-            return version && (parseInt(version) >= 2015051100) && site.canDownloadFiles();
+            return site.isVersionGreaterEqualThan('2.9') && site.canDownloadFiles();
         });
     };
 
diff --git a/www/addons/mod/forum/controllers/newdiscussion.js b/www/addons/mod/forum/controllers/newdiscussion.js
index 678de7e4262..a44d244b354 100644
--- a/www/addons/mod/forum/controllers/newdiscussion.js
+++ b/www/addons/mod/forum/controllers/newdiscussion.js
@@ -59,8 +59,8 @@ angular.module('mm.addons.mod_forum')
                         // We need to check which of the returned groups the user can post to.
                         promise = validateVisibleGroups(forumgroups, refresh);
                     } else {
-                        // WS already filters groups, no need to do it ourselves.
-                        promise = $q.when(forumgroups);
+                        // WS already filters groups, no need to do it ourselves. Add "All participants" if needed.
+                        promise = addAllParticipantsOption(forumgroups, true);
                     }
 
                     return promise.then(function(forumgroups) {
@@ -135,8 +135,8 @@ angular.module('mm.addons.mod_forum')
                 return false;
             }).then(function(canAdd) {
                 if (canAdd) {
-                    // The user can post to all groups, return them all.
-                    return forumgroups;
+                    // The user can post to all groups, add the "All participants" option and return them all.
+                    return addAllParticipantsOption(forumgroups);
                 } else {
                     // The user can't post to all groups, let's check which groups he can post to.
                     var promises = [],
@@ -189,6 +189,37 @@ angular.module('mm.addons.mod_forum')
         return filtered;
     }
 
+    // Add the "All participants" option to a list of groups if the user can add a discussion to all participants.
+    function addAllParticipantsOption(groups, check) {
+        var promise;
+
+        if (!$mmaModForum.isAllParticipantsFixed()) {
+            // All participants has a bug, don't add it.
+            return $q.when(groups);
+        } else if (check) {
+            // We need to check if the user can add a discussion to all participants.
+            promise = $mmaModForum.canAddDiscussionToAll(forumId).catch(function() {
+                // The call failed, let's assume he can't.
+                return false;
+            });
+        } else {
+            // No need to check, assume the user can.
+            promise = $q.when(true);
+        }
+
+        return promise.then(function(canAdd) {
+            if (canAdd) {
+                groups.unshift({
+                    courseid: courseId,
+                    id: -1,
+                    name: $translate.instant('mm.core.allparticipants')
+                });
+            }
+
+            return groups;
+        });
+    }
+
     fetchDiscussionData().finally(function() {
         $scope.groupsLoaded = true;
     });
diff --git a/www/addons/mod/forum/services/forum.js b/www/addons/mod/forum/services/forum.js
index ecd775ae540..2210bfb3950 100644
--- a/www/addons/mod/forum/services/forum.js
+++ b/www/addons/mod/forum/services/forum.js
@@ -203,8 +203,7 @@ angular.module('mm.addons.mod_forum')
     self.canAddAttachments = function(siteId) {
         return $mmSitesManager.getSite(siteId).then(function(site) {
             // Attachments allowed from Moodle 3.1.
-            var version = parseInt(site.getInfo().version, 10);
-            return version && version >= 2016052300;
+            return site.isVersionGreaterEqualThan('3.1');
         });
     };
 
@@ -268,6 +267,18 @@ angular.module('mm.addons.mod_forum')
         return undefined;
     };
 
+    /**
+     * There was a bug adding new discussions to All Participants (see MDL-57962). Check if it's fixed.
+     *
+     * @module mm.addons.mod_forum
+     * @ngdoc method
+     * @name $mmaModForum#isAllParticipantsFixed
+     * @return {Boolean} True if fixed, false otherwise.
+     */
+    self.isAllParticipantsFixed = function() {
+        return $mmSite.isVersionGreaterEqualThan(['3.1.5', '3.2.2']);
+    };
+
     /**
      * Check if canAddDiscussion is available.
      *
diff --git a/www/addons/mod/imscp/services/imscp.js b/www/addons/mod/imscp/services/imscp.js
index c2acb71b9e1..4cdaed955b0 100644
--- a/www/addons/mod/imscp/services/imscp.js
+++ b/www/addons/mod/imscp/services/imscp.js
@@ -358,9 +358,7 @@ angular.module('mm.addons.mod_imscp')
         siteId = siteId || $mmSite.getId();
 
         return $mmSitesManager.getSite(siteId).then(function(site) {
-            var version = site.getInfo().version;
-            // Require Moodle 2.9.
-            return version && (parseInt(version) >= 2015051100) && site.canDownloadFiles();
+            return site.isVersionGreaterEqualThan('2.9') && site.canDownloadFiles();
         });
     };
 
diff --git a/www/addons/mod/wiki/services/wiki.js b/www/addons/mod/wiki/services/wiki.js
index 52ed0a3fc97..5aaeffc061a 100644
--- a/www/addons/mod/wiki/services/wiki.js
+++ b/www/addons/mod/wiki/services/wiki.js
@@ -448,10 +448,8 @@ angular.module('mm.addons.mod_wiki')
         }
 
         if (lockonly) {
-            var version = $mmSite.getInfo().version;
-
             // This parameter requires Moodle 3.2. It saves network usage.
-            if (version && parseInt(version, 10) >= 2016100700) {
+            if ($mmSite.isVersionGreaterEqualThan('3.2')) {
                 params.lockonly = 1;
             }
         }
diff --git a/www/core/components/course/services/course.js b/www/core/components/course/services/course.js
index 8a22efce8b0..47924d8cda6 100644
--- a/www/core/components/course/services/course.js
+++ b/www/core/components/course/services/course.js
@@ -597,9 +597,7 @@ angular.module('mm.core.course')
         }
 
         return $mmSitesManager.getSite(siteId).then(function(site) {
-            var version = parseInt(site.getInfo().version, 10);
-
-            if (version >= 2015051100) {
+            if (site.isVersionGreaterEqualThan('2.9')) {
                 // From Moodle 2.9 the course contents can be filtered, so maybe the module doesn't have contents
                 // because they were filtered. Try to get its contents.
                 return self.getModule(module.id, courseId, sectionId, preferCache, ignoreCache, siteId).then(function(mod) {
diff --git a/www/core/lib/site.js b/www/core/lib/site.js
index 062a709ed77..cda8236e0f6 100644
--- a/www/core/lib/site.js
+++ b/www/core/lib/site.js
@@ -498,6 +498,32 @@ angular.module('mm.core')
      * Check if a certain feature is disabled in the site.
      */
 
+    /**
+     * @module mm.core
+     * @ngdoc method
+     * @name $mmSite#isVersionGreaterEqualThan
+     * @param  {Mixed} versions Version or list of versions to check.
+     * @return {Boolean}        True if greater or equal, false otherwise.
+     * @description
+     *
+     * Check if the site version is greater than one or some versions.
+     * This function accepts a string or an array of strings. If array, the last version must be the highest.
+     *
+     * If a string is supplied (e.g. '3.2.1'), it will check if the site version is greater or equal than this version.
+     *
+     * If an array of versions is supplied, it will check if the site version is greater or equal than the last version,
+     * or if it's higher or equal than any of the other releases supplied but lower than the next major release. The last
+     * version of the array must be the highest version.
+     * For example, if the values supplied are ['3.0.5', '3.2.3', '3.3.1'] the function will return true if the site version
+     * is either:
+     *     - Greater or equal than 3.3.1.
+     *     - Greater or equal than 3.2.3 but lower than 3.3.
+     *     - Greater or equal than 3.0.5 but lower than 3.1.
+     *
+     * This function only accepts versions from 2.4.0 and above. If any of the versions supplied isn't found, it will assume
+     * it's the last released major version.
+     */
+
     /**
      * @module mm.core
      * @ngdoc method
diff --git a/www/core/lib/sitesfactory.js b/www/core/lib/sitesfactory.js
index c8109eac0f1..c6336392318 100644
--- a/www/core/lib/sitesfactory.js
+++ b/www/core/lib/sitesfactory.js
@@ -236,7 +236,18 @@ angular.module('mm.core')
             "moodle_webservice_get_siteinfo": "core_webservice_get_site_info",
         };
 
-        var self = {};
+        var self = {},
+            moodleReleases = {
+                '2.4': 2012120300,
+                '2.5': 2013051400,
+                '2.6': 2013111800,
+                '2.7': 2014051200,
+                '2.8': 2014111000,
+                '2.9': 2015051100,
+                '3.0': 2015111600,
+                '3.1': 2016052300,
+                '3.2': 2016120500
+            };
 
         /**
          * Site object to store site data.
@@ -752,7 +763,7 @@ angular.module('mm.core')
          */
         Site.prototype.uploadFile = function(uri, options) {
             if (!options.fileArea) {
-                if (parseInt(this.infos.version, 10) >= 2016052300) {
+                if (this.isVersionGreaterEqualThan('3.1')) {
                     // From Moodle 3.1 only draft is allowed.
                     options.fileArea = 'draft';
                 } else {
@@ -1290,6 +1301,123 @@ angular.module('mm.core')
             return method;
         };
 
+        /**
+         * Check if the site version is greater than one or some versions.
+         * This function accepts a string or an array of strings. If array, the last version must be the highest.
+         *
+         * @param  {Mixed} versions Version or list of versions to check.
+         * @return {Boolean}        True if greater or equal, false otherwise.
+         * @description
+         * If a string is supplied (e.g. '3.2.1'), it will check if the site version is greater or equal than this version.
+         *
+         * If an array of versions is supplied, it will check if the site version is greater or equal than the last version,
+         * or if it's higher or equal than any of the other releases supplied but lower than the next major release. The last
+         * version of the array must be the highest version.
+         * For example, if the values supplied are ['3.0.5', '3.2.3', '3.3.1'] the function will return true if the site version
+         * is either:
+         *     - Greater or equal than 3.3.1.
+         *     - Greater or equal than 3.2.3 but lower than 3.3.
+         *     - Greater or equal than 3.0.5 but lower than 3.1.
+         *
+         * This function only accepts versions from 2.4.0 and above. If any of the versions supplied isn't found, it will assume
+         * it's the last released major version.
+         */
+        Site.prototype.isVersionGreaterEqualThan = function(versions) {
+            var siteVersion = parseInt(this.getInfo().version, 10);
+
+            if (angular.isArray(versions)) {
+                if (!versions.length) {
+                    return false;
+                }
+
+                for (var i = 0; i < versions.length; i++) {
+                    var versionNumber = getVersionNumber(versions[i]);
+                    if (i == versions.length - 1) {
+                        // It's the last version, check only if site version is greater than this one.
+                        return siteVersion >= versionNumber;
+                    } else {
+                        // Check if site version if bigger than this number but lesser than next major.
+                        if (siteVersion >= versionNumber && siteVersion < getNextMajorVersionNumber(versions[i])) {
+                            return true;
+                        }
+                    }
+                }
+            } else if (typeof versions == 'string') {
+                // Compare with this version.
+                return siteVersion >= getVersionNumber(versions);
+            }
+
+            return false;
+        };
+
+        /**
+         * Get a version number from a release version.
+         * If release version is valid but not found in the list of Moodle releases, it will use the last released major version.
+         *
+         * @param  {String} version Release version to convert to version number.
+         * @return {Number}         Version number, 0 if invalid.
+         */
+        function getVersionNumber(version) {
+            var data = getMajorAndMinor(version);
+
+            if (!data) {
+                // Invalid version.
+                return 0;
+            }
+
+            if (typeof moodleReleases[data.major] == 'undefined') {
+                // Major version not found. Use the last one.
+                data.major = Object.keys(moodleReleases).slice(-1);
+            }
+
+            return moodleReleases[data.major] + data.minor;
+        }
+
+        /**
+         * Given a release version, return the major and minor versions.
+         *
+         * @param  {String} version Release version (e.g. '3.1.0').
+         * @return {Object}         Object with major and minor. Returns false if invalid version.
+         */
+        function getMajorAndMinor(version) {
+            var match = version.match(/(\d)+(?:\.(\d)+)?(?:\.(\d)+)?/);
+            if (!match || !match[1]) {
+                // Invalid version.
+                return false;
+            }
+
+            return {
+                major: match[1] + '.' + (match[2] || '0'),
+                minor: parseInt(match[3] || 0, 10)
+            };
+        }
+
+        /**
+         * Given a release version, return the next major version number.
+         *
+         * @param  {String} version Release version (e.g. '3.1.0').
+         * @return {Number}         Next major version number.
+         */
+        function getNextMajorVersionNumber(version) {
+            var data = getMajorAndMinor(version),
+                position,
+                releases = Object.keys(moodleReleases);
+
+            if (!data) {
+                // Invalid version.
+                return 0;
+            }
+
+            position = releases.indexOf(data.major);
+
+            if (position == -1 || position == releases.length -1) {
+                // Major version not found or it's the last one. Use the last one.
+                return moodleReleases[releases[position]];
+            }
+
+            return moodleReleases[releases[position + 1]];
+        }
+
         /**
          * Get cache ID.
          *
diff --git a/www/core/lib/webworkers.js b/www/core/lib/webworkers.js
index 19c7c4f114a..1ab707642d0 100644
--- a/www/core/lib/webworkers.js
+++ b/www/core/lib/webworkers.js
@@ -36,7 +36,7 @@ angular.module('mm.core')
  *
  * Example usage:
  *
- * if ($mmWebWorkers.isSupportedByDevice() && $mmWebWorkers.isSupportedInSite(site.getInfo().version)) {
+ * if ($mmWebWorkers.isSupportedByDevice() && $mmWebWorkers.isSupportedInSite(site)) {
  *     $mmWebWorkers.startWorker(name, path, params).then(function() {
  *         // Final message will be received in here.
  *     }, function() {
@@ -103,21 +103,20 @@ angular.module('mm.core')
      * @module mm.core
      * @ngdoc method
      * @name $mmWebWorkers#isSupportedInSite
-     * @param  {Number} [version] The site version. If not defined, current site will be used.
-     * @return {Boolean}          True if supported, false otherwise.
+     * @param  {Object} [site] Site to check. If not defined, current site.
+     * @return {Boolean}       True if supported, false otherwise.
      */
-    self.isSupportedInSite = function(version) {
-        if (!version) {
+    self.isSupportedInSite = function(site) {
+        if (!site) {
             // We use injector to keep this service as independent as possible.
-            var site = $injector.get('$mmSite');
+            site = $injector.get('$mmSite');
             if (!site || !site.isLoggedIn()) {
                 return false;
             }
-            version = site.getInfo().version;
         }
 
         // WebWorkers needs CORS enabled at the Moodle site, it is supported from 2.8.
-        return version >= 2014111000;
+        return site.isVersionGreaterEqualThan('2.8');
     };
 
     /**