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HICK'S LAW
The time it takes to make a decision increases with the number and complexity of choices.
To help user in making decisions, just the top-most important options are displayed at the top.
FITTS'S LAW
The time it takes to make a decision increases with the number and complexity of choices.
Paytm smartly places the sticky(FAB) and most often used button of the Paytm app,SCAN QR CODE, within easy reach.
JAKOB'S LAW
Users spend most of their time on other sites. This means that users prefer your site to work the same way as all the other sites they already know.
In order for the user to simply move through the screens without having to learn new things, the app makes sure that the interface is well known to and already present in the user's mental model.
LAW OF PROXIMITY
Objects that are near, or proximate to each other, tend to be grouped together.
Paytm groups related things with a suitable title to create a seamless flow throughout your app interactions.