Usually, the reason for not hearing any sounds for notifications is a general configuration setting on your iPhone. But just to be sure, please first check your reminder configuration in Moodistory:
Open Moodistory, go to the reminder settings and select the reminder for which you are missing the sound.
Check if the option for Sound is ON.
Tap on Sound and make sure that the option “Vibrate only” is set to OFF and one of the sounds in the list below is selected.
Now save the sound settings and the reminder: On the sound settings screen (see the previous step), tap the checkmark in the upper right-hand corner to go to the previous screen. Now, tap again on the checkmark in the upper right-hand corner to save the reminder.
Let’s continue to your device’s settings to check whether it is configured to play sounds for notifications:
Open your iPhone’s ‘Settings’ and select ‘Do Not Disturb‘. Make sure that the very first option ‘Do Not Disturb’ is OFF.
Make sure that your device’s hardware mute switch is NOT set to silent. The switch should be in the upper position, meaning you should NOT see the red-orangish color if you look at the switch from the side.
Open your iPhone’s ‘Settings’ and select ‘Notifications’. There’s a list of apps at the bottom. Please select Moodistory and make sure that the switch for sounds is set to ON.
Check your notification sound volume: Again, open your iPhone’s ‘Settings’ and select ‘Sounds’. The slider for ‘Ringer and alerts’ controls the notification sound volume. Slide it up to at least the middle.