@Solla-topee 

I am sorry Sofia but your response is unhelpful and just makes your customers even more disappointed in their purchases. 
 

It is not hard to combine the two product on a single app. As seen in an earlier post a third party was able to do it on IOS. If a third party can do it then it stands to reason that the company that developed the platforms can do it even easier. Fact is it has nothing to do with how hard it is and simply TPLink has no interest in doing it. Two very different things.

This is a product sector that is all about convenience and having two incompatible lines is very inconvenient for your customers hence the backlash. TPLink can choose to ignore that but I suspect they will loose customers as a result. Simple fact is if anyone is looking to build up a smart home then they need the various products to simply work together or it is not very SMART.

To that end I have a few questions:

1) Is KASA planned to be replaced by TAPO? I am new to this and will be very disappointed if I continue my investment in KASA only to have your organisation drop it in favour of TAPO. 
 

2) do both platforms support API control and interaction? If so will the remote support of this continue even if you end of life One of them?

I am here to join the crowd.  I have way too many apps for my smart devices and having two of them for the same company is dumb. 

Yeah, this is the end for me and TP-Link smart home products. Not only did they introduce an incompatible line of products, but, like Kasa, the new line is stubbornly incompatible with HomeKit and does not support the emerging Thread standard that is being adopted by Apple, Google, and Amazon.

Why would I recommend a smart plug from a company that can't decide which of its 2 walled gardens should lock me in? Your brand confusión and disloyalty to your own customers will ensure that future sales will go to manufacturers that don't play these games. 

@Solla-topee Hi, since it appears Tapo and Kasa apps are not joining, would TP-Link provide API or communication protocols specifications so a third party developers may create an app that work with both line of products (for the Android platform)?

Thanks.

@JohannesPaulus yes, it's a pain having to run 2 apps, one for KASA & one for TAPO devices. However, the ALEXA app will accommodate both series of devices, and to that extent you can integrate & manage all TPLINK smart devices through ALEXA. It's not a full integration as not all smart device features are managed through ALEXA, but the basics are there. Try it !

@r.h Has nobody heard of Google home?

One app for all your smart appliances? All in one place? Built in shortcuts for Android from you control panel etc

@Welshmun I've just added a Tapo WiFi plug when I've already got a kasa WiFi plug. Once I added Tapo to Alexa it booted kasa off. I've had to remove Tapo and Kasa and re-add kasa. So in my experience you can't manage both kasa and tapo through Alexa, it's one or the other. I found this thread looking for solutions. 

@Solla-topee a single app to control both kasa and tapo devices would be ideal 

Was soo close to buy a tapo bulb!

This is so stupid I can't comprehend it!
So stupid and misleading I now will look at other brands to phase out tplink completely.