Is there any app to auto arrange icons in alphabetic order

Instead of rebooting, restarting the home-screen should suffice.

hi i tried doing that but no go. the order did not changed

it does not work for the 9 or so preinstalled apps (those are shown first), but it should work for all manually installed ones at least).

no nothing changes. it remains like that only

Why should the list default to alphabetical order when hidden or renamed?, there is no process put in place to reorder the file, hiding/renaming it won't default the list contents/launcher icon layout.

If you take a look at the contents of a .desktop file, you'll see that the naming convention for applications is not straight forward. While one app might be called 'mediaplayer' by pretty name (what you see on the launcher) when the app file name is 'jolla-mediaplayer' - title and file name often vary, as they do with Sailfish, but we have several 'Jolla' apps, jolla-email, jolla-gallery, jolla-mediaplayer, jolla-clock, jolla-settings, jolla-contacts........and then we have 3rd party apps; harbour-warehouse, harbour-file-browser, harbour-usb-switch, with a few other types; openrepos-clock-settings ..........my point being, to effectively reorder apps on the launcher, the sorting will need to be done by the 'pretty names' given to the apps; Phone, Email, Gallery Contacts.......but this is not how the applications menu file is configured, filenames are used, not pretty names.