@Riley_S 

Thank you for your response.  Unfortunately, something remains faulty with the app.  Very briefly, I was able

to access my devices and navigate the new version.  Then I installed the most recent version, and now I am back to the same problems as before.  I have deleted and reinstalled the app at least a half-dozen times, to no avail.  My iOS is current.  The app is current.  My login works.  My settings are correct.  But what happens each time the app is reinstalled is that it gets as far as the first screen of the walkthrough, hangs on that view, and then after closing the app it goes to the green screen and remains there.  A few times it has gotten stuck prior to reaching the walkthrough; but in most instances, it reaches that first screen -- which appears to have additional pages to swipe through -- and then locks.  The only solution is to delete the app, reinstall it, and log in again... which just leads to the same problem.  Any suggestions would be very welcome.  Thank you.

This issue with the iOS App is not limited to a few individuals, unfortunately. After searching around a bit, I found that many, many users are having the same types of issues across most iOS devices, including myself.

I have 48 devices spread across plugs, switches, cameras, and bulbs, and the controls via the App for these devices are almost completely useless. While I am able to actually load the app (unlike OP), I have sit and wait for a touch command to complete, whether that command is navigating the app's tabs or pages, turn on/off a device, look at a camera, or customize light bulb settings (which I have only been able to do once).

Luckily I have other means to control my Kasa Devices through a piece of third-party home automation software. Regardless, this is unacceptable and needs to be addressed immediately. I find myself checking the Apple App Store multiple times a day just to see if an update was pushed...not what I expect to do with a Home Automation pillar like Kasa. 

  @dwr my app also stopped working as soon as I updated to the new version. I did not have any issues with IOS 16 and previous version. I uninstalled the app and reinstalled it. Unlike the upgrade version, I was asked to accept the agreement and to allow network access. When clicked on the network link provided, it opened a window that did not have any options to allow network access to Kasa.

I am unable to find the Network toggle option under Settings - Kasa.
I only see 4 options:

siri & search 

notifications 

cellular data 

And language. 

  @fcadena72 I am not sure why that specific toggle isn't show you for you. In the attached image, you will see at the top where a user can toggle the "Local Network" setting.

I do not mean to be rude when I ask this, but have you tried turning your Wi-Fi and/or iPhone off and then on again? Then check the settings...

I hate to say it, but half the time issues like yours happen, it's because the app itself hasn't fully "nested" itself within your phone. Give it a shot, and post back.

  @dwr great suggestion and got me half way there. I turned off Wi-Fi and Bluetooth and Kasa was able to work successfully using Cellular only.

As you can see from my screenshot even after I turn off/on my wifi and Bluetooth, Kasa did not give me the option to toggle them.

In order for me to use this wonderful and updated App, my only option is to completely turn off my wii-fi for ALL my apps.

Support: Yes, I downloaded the latest 3.0.2 version found at the App Store.

Is there a way to download  my old and less shiny app?

  @Solla-topee 

Any version after v3 in the Apple App Store is causing major stability issues for a number of customers. This has been documented on multiple social platforms like Reddit, Twitter, etc., including the reviews in the Apple App Store and Google Play Store.

I normally wouldn't be adding my voice to something like this, but I have spent a good deal of money on Kasa Products over the years with the majority of these products controlling 90% of my lighting, switch controls, and general device controls within my residence (currently over 45 devices in use).

So to have the main way of controlling these devices become unstable and/or unusable for over 2 weeks is absolutely unacceptable. 

Can you at least confirm that Kasa is looking into this issue with the potential of a solution coming soon?

Kasa App Version: 3.0.2 - Build 1262

Device: iPhone XR - iOS 16.0.2