There are applications which allow
smartphone/tablet users to expand their device's RAM by a substantial
amount. Take the Roehsoft RAM Expander for instance. We had used this
app in one of my devices, which has only 256 MB RAM and could not run
even some basic games. But after using the app, there was a noticeable
change in the device's performance.
However, keep in mind that such applications require your device to
be rooted and rooting a device voids its warranty. Also, rooting is
advisable only for advance users and you should not try rooting your
smartphone or tablet if you do not have thorough knowledge of its
functioning, as during the process you may end up killing your device
altogether.
Before we proceed, lets have a look at the properties of the Roehsoft
Ram Expander application. First of all, it is a paid application
available from Google Play store for a hefty price of Rs 499. According
to its developers, the app can increase the RAM of the device to 4 GB,
which is a very tall claim as no tablet or smartphone as of now comes
with such huge RAM. The app uses the micro SD card's storage.
Of course, since it claims to increase the RAM to 4 GB you need to
have a high capacity micro SD card. It's best if you have a 16 GB or
higher capacity card as you also need to use the micro SD card to store
your content. Also, go for a higher class micro SD card which has a
higher data transfer rate and is crucial for better device performance.
Here is a step by step approach on how to use the app.
Step 1:

Before installing the Roehsoft Ram Expander application, you first
need to root your device. If you already have a rooted device just
download the app from Google Play store.
Step 2:

From the menu tray of your device, locate and run the application. On
opening, the app will ask you to choose your language - English or
Deutsch. Then it would ask for root access; just press ok to proceed
further. It will take just 10 seconds to complete the formality.