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What is a product?
A PRODUCT is something that - 
 serves a purpose 
 does something for me
Product
This is a product I LOVE: AirDroid
What is a product 
that you LOVE?
WHY?
Building a Product 
that users will LOVE
E. M. Yeaseenur Rahman TAHIN 
@tahins 
Front End Engineer 
www.green-red.com
3 reasons to LOVE a product 
 Functionalities 
 User Interface (UI) 
 User eXperience (UX)
UI
UI answers 3 HOW questions 
 How it looks 
 How it is understood 
 How it works
Evolution of 
UI
VisiCalc - 1st spreadsheet program
Apple Lisa - 1st OS with GUI
Windows UI
Widgets
Skeuomorphic Design
Modern UI
Material Design
Building A Product That Users Will Love
15 Laws of 
UI
Building A Product That Users Will Love
Keep things clear 
to your user
Law of 
Clarity 
1
Building A Product That Users Will Love
Building A Product That Users Will Love
Building A Product That Users Will Love
Remove everything that 
can be removed from the UI
Law of 
Cleanliness 2
Building A Product That Users Will Love
Building A Product That Users Will Love
Building A Product That Users Will Love
Building A Product That Users Will Love
Building A Product That Users Will Love
New user? 
Give him a hug tour
Law of 
3 
Product Tour
Autoplay audio/video
Building A Product That Users Will Love
Dont embarrass user 
or 
block them from content
Law of 
4 
Not Interrupting
Building A Product That Users Will Love
Provide feedback 
when necessary
Law of 
Feedback 5
This is important but not clickable 
This is a button 
This is not a button
This is not a button
Dont do anything, 
users wont expect
Law of 
6 
Not Surprising
Building A Product That Users Will Love
If you want your user to do 
something - 
Just Ask
Law of 
7 
Guided Action
Building A Product That Users Will Love
Show helpful info 
when & where needed
Law of 
8 
Being Helpful (inline)
Building A Product That Users Will Love
Users will make mistakes 
Forgive them
Law of 
Forgiveness 9
Change your name: Google+
Building A Product That Users Will Love
Change your name: Facebook (!!!)
Switching between page and profile
Provide the right option 
when & where needed
Law of 
Context 10
What are the primary actions here?
What are the primary actions here?
What are the primary actions here?
What are the primary actions here?
Not more than 2 
primary actions per screen
Put primary actions 
front and center
Law of 
11 
Primary Action
How do you Log Out?
Zoom into the corner
Here it is
Put secondary actions 
in secondary place
Law of 
12 
Secondary Action
Whose site is that?
Whose site is that?
What makes it look consistent? 
 Logo 
 Color 
 Fonts 
 Layout
What about this? www.theworldsworstwebsiteever.com
Make users familiar 
with you
Law of 
Consistency 13
Which brands come to your mind?
Using color to
Which emails are unread here?
Picture says 1000 words 
Color says 1000 pictures
Law of 
Using Color 14
How do you open this door?
Google Now
Serve user before 
they take action
Law of 
Invisible UI 15
UX
Building A Product That Users Will Love
Building A Product That Users Will Love
5 Points to 
Remember
Think From 
Day 1 
1
2 
Desktop, Tablet 
& Mobile are different
Building A Product That Users Will Love
COOL 
3 
is not always useful
Building A Product That Users Will Love
More is Good 
but 
Less is More 
4
Weather widget
Profile
Thermostat
(Proper) 
5 
Whitespace is Good
Which one looks better? Why?
Too much whitespace!!!
Testing UX 
because you are not everyone
Usability Test
Become a User
Sibling Test
A/B Test
Use Tools
Building A Product That Users Will Love
Thanks

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Building A Product That Users Will Love