Hello ​@Muzzer100, welcome back!

I am sorry to hear you are experiencing issues with the Sonos App.

Can you provide us with some information so that we may assist you?

Moderator Note: Modified thread title in accordance with the Community Code of Conduct.

I find the app to be very useful. In fact, I use it for all my streaming services, local library, adding speakers, and grouping my 7 rooms when having dinner parties.

I very rarely use Airplay because everything I need is either in my music library, that I update frequently, or from a streaming service.

We have to use the app to set the speakers up, but the app is utterly useless! Which in turn turns the speaker into an expensive paper waight! Sonos needs to make a working app or alow the speaker to be set up without it.

Hello ​@Angelfire1945, as ​@Sotiris C. wrote in the first response,can you please provide more information about the issues you are having?

1. What speakers do you have?
2. What type of network/router do you have?
3. Are you using the latest speaker firmware update and latest app update?
4. Do you use a Bridge or Boost?
5. Have you contacted Sonos support to speak with a tech?

Answers to these questions can help others help you to gain control over your speakers again.

Sure.

I had 4 speakers connected to the app but I had to move the location of ,, this ment unpluging them. Normally they just reconnect but the app couldn't locate them.

I tryed re pairing them, but the app couldn't detect them, so as suggested by the app I restarted my phone and the WiFi. After this it could find one of them (and older one sl model)

But nothing for the other, I checked the app to see if it needed updating but it didn't, so I tryed a installing and re installing the app, but again it couldn't find the other speaker (a one) 

I tryed a factory reset for the speaker, after this the app could find and connect to the speaker but once complete it did not show it in my list of speakers? I repeated this a few times with the same issue? I powered it all off and left it for an hour and tryed again but the same problem.

Problem is if the app won't work the speaker is useless as I can't find any other way to pair a speaker to another or any device without going through the sonos app first.

This went on for about 3hrs (4 if you include the break) and suddenly it was there?? No idea why? I followed the same procedure (from the web page over and over but after many attempts it was just there.

The app needs a way to "forget" system so you can start from the beginning instead of it repeating the same fault or some sort of bypass to use a speaker without the app when it won't work, as the speakers are useless when the app won't work.

Phone is a samsung fold 6 on UI6

The affected speakers

Sonos one

Sonos one sl

Others on the system

Era 300

Ikea lamp speaker

Thanks for the information. 
When you moved the Ones, did you move them further away from the router? If so that may be a part of the problem you are facing. 

For troubleshooting purposes, are you able to hardwire one of the Ones to your router/network? If that works there may be WIFI interference. I would suggest setting static IP addresses for all your speakers.