@ARGamingPK1 That is what I am expecting, but the Android app refuses to connect to the Decos, even 'tho it is logged on to that wifi network.

  @Lusitania yes you can use the same app on multiple devices including across platforms. However, I've found on Apple devices it auto selects rotating IP addresses called "private WI-FI address" not sure what it's called on android off hand. 

So when connecting using the app on other devices you may meed to turn this off and have a "fixed" address. 
Additionally I've found that sometimes if you have 2.4G, 5G or even 6G running on your network or even multiple mesh/routers/APs you have one device connected to one and another connected elsewhere. Often I find disconnecting and reconnecting in the same room helps. 
 

good luck 

Dave 

  @dpartonginno Thank you for the suggestion.  I have looked for references of managing "private" and "fixed" addresses on the settings for the iPa and the Android phone, also on the Deco app, without success.  Can you give me ideas of where to look?  I should say that both the iPad and the Samsung phone also have the TP-Link Tapo app running OK, controlling a number of smart plugs, etc. on this same wi-fi network.

  @Lusitania 

On Samsung Android phones, the Private Wi-Fi address setting (Samsung sometimes calls this Randomised MAC address) is found per network, not in a single global menu.

Here’s how to locate it:

For a connected Wi-Fi network

1. Settings
2. Connections
3. Wi-Fi
4. Tap the gear icon (⚙️) next to the connected network
5. Tap View more or Advanced (wording varies by One UI version)
6. Look for MAC address type or Privacy
7. Select:
   • Randomised MAC → Private Wi-Fi address ON
   • Phone MAC → Private Wi-Fi address OFF

8. Set MAC address type

   • Randomised MAC or Phone MAC

On an iPad (iPadOS), Apple calls this Private Wi-Fi Address, and—like Samsung—it’s set per Wi-Fi network.

For a connected Wi-Fi network

1. Settings
2. Wi-Fi
3. Tap the ⓘ (info icon) next to the connected network
4. Toggle Private Wi-Fi Address
   • ON → iPad uses a randomised (private) MAC address
   • OFF → iPad uses its hardware MAC address
5.  
6. If you change it, you may be prompted to Rejoin Network

Change these to fixed or off.