Here is the next build to test:

http://www.skydemon.aero/extras/aero.skydemon.skydemonandroid.test2.apk

No slowdown so far. 

In that case, the issue is presumably solved. The last test was a fully up-to-date version of 3.6.5 with one minor change to address the issue that some Android devices were presenting. Thanks for helping us resolve this.

Tim,

As far as I can tell, the speed issue has been fixed. Now performing like version 3.6.2.
However, I notice that the airfield explorer isn't working properly. It was on previous test versions but all I see now is the SD applied overlay on a blank background. Selecting  Mapping - satellite, roads or hybrid makes no difference.
I have tried it for three airfields with identical results.
Tony

That's weird, we haven't touched that feature recently. Can anyone else observe this?

Negative , Arfield Explorer is working properly here . . 

Well, who knows! Now working and all I have done is recycle my S3....
This feature does seem a bit intermittent (for me) but is most likely my version of Android.
I have experienced this kind of behaviour before for Airfield Explorer between various upgraded SD versions.
Tony

I have just loaded the Android beta release to my Samsung Note 4 and first impressions are that once loaded it runs OK, however I tested the logging in screen and that is as bad as it was. That is it takes for ever to type in user name and password. Also loading seems very much slower initially when compared to the 6.2 release.

I have not had issues with the other apps slowing down.

John

Now loaded version above and problem with login has now gone and loading is much  faster. 

Also now loaded on Nexus 7 and all seems good. So presumably it wasn't a problem with Android at all ?
 Having both iPad and Android devices, an iPad 2, an iPad 2 Air, a nexus 7 and a Note 4 I have to say that whilst I agree the Apple devices are, in general, easier and more intuitive to use, they are not without slowing down at each release of a new OS, the ipad 2 is now nearly useless and there is no way back, There have been plenty of well documented release bugs as well, e.g. the GPS issues a few releases back, and they are about 3 times the cost of the Android devices.
Additionally they do shut down and overheat, I am sure some Android devices do as well, they suffer from glare and are not the brightest screens and there is a far greater choice available of Android devices.

So its horses for courses.

John