Random ringtone everytime

This might do something similar; https://openrepos.net/content/schturman/auto-ambience-changer as each ambience has a different ringtone.

yeah, i have tried this already, but i had to spent much time with setting up for example 8 ambiences (same ambiances, but another ringtone), my solution could be better.you can simply put desired files in one folder and tell the app where folder is.This app will be listed between ringtones as Custom Ringtone - you will set it as ringtone in current ambience and whenever someone calls, app will choose custom ringtone and start ringing. I think this is much more easy to set up than make x ambiances only because another ringtone.

noone knows about any solution? :(

The script should be pretty simple. Problem here is triggering the script after hunging up every call, which is beyond my knowledge; or just running the script every X minutes/hours. If you choose the later, there are several options: systemd scheduler doesn't work when the phone is sleeping and I've found 'timedclient-qt5" rather unstable. So the only remaining choice is CRON; better 'Sailcron' for you, since it's got a graphical interface (available through Openrepos), which needs 'Vixiecron' (also at Openrepos, same repository).

If you want to try, as for the script, I've just run this one on my Sailfish X and it works flawlessly:

#!/bin/bash

# This script changes custom ringtone at given intervals,
# configurable by CRON options. Tones must be MP3 files.

# This is the folder you are putting your MP3 ringtones in.
# Subfolders are also scanned.
FOLDER='/home/nemo/Music/ringtones'

# This is the bogus MP3 file (actually, it's just a soft link)
# you need to point at in Settings>Sounds>Ringtone.
BOGUSMP3='/home/nemo/Music/randomringtone.mp3'

COLLECTION=$(find $FOLDER -type f -name "*.mp3")
TOTALMP3=$(echo "$COLLECTION" | wc -l)

while :; do
        RANDOMNUMBER=$(( RANDOM % TOTALMP3 ))
        RANDOMMP3=$(awk 'NR=='${RANDOMNUMBER}<<<"$COLLECTION")

        [[ -f "$RANDOMMP3" ]] && break
done

ln -f -s "$RANDOMMP3" "$BOGUSMP3"

You must save it somewhere (my scripts are at /home/nemo/bin) and give it execute permission. If you don't have developer mode enabled, try File Browser app. Next should be download and install Sailcron and Vixiecron. Tell me if you're interested.

yeas, i am interested :) but i have a little knowledge about linux