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Bankinter
Bankinter
Bankinter
Bankinter
Bankinter
UX / UI
UX / UI
Creation of the new application for individuals for Bankinter, one of the main banks in the Spanish financial system.
Creation of the new application for individuals for Bankinter, one of the main banks in the Spanish financial system.
Creation of the new application for individuals for Bankinter, one of the main banks in the Spanish financial system.
UX / UI
Hey, I'm Daniel.
Digital Product Designer based in Madrid, working worldwide.
Donal, Maria, and Eva work with digital products, just like us.
And they wondered what Behavioral Design is.
Behavioral Design is to use psychology to drive real decisions. It’s scientific, not art.
Best brands bet big on Behavioral Design. They want better results. They get them.
I'll show you with 5 quick, real brand examples — no theory
Ones you probably wouldn't think to apply.
Case 1/5
(Less than a 30-second read)
Would you repeat the same word 10 times on a single page like Mailchimp does?
Donal is a Teammate and product Desinger
While working on a subscription flow with Donal, I deliberately suggested repeating the key message 'Cancel anytime' to boost conversion.
Mailchimp repeats the word “Free” 10 times on this screen
He looked at me and said:
'But Daniel… isn’t that redundant?'
Nope. It’s smart. Mailchimp uses the same Strategy.
It’s not just design. It’s psychology
Why is smart?
Repetition builds trust
No magic
The result?
More singn-ups
Boom!
🎉 Works
It triggers a psychological response called
Mere Exposure Effect.
We like things or people more when we’ve seen them several times—because they start to feel familiar.
(Robert B. Zajonc in 1968)
tinder
Case 2/5
(Less than a 30-second read)
Would you get a crazy amount of users to re-subscribe...
with just a simple color change? Tinder does.
Maria is a very talented recruiter with great instincts in product design
One day I had a talk with Maria. When I told her I was a Behavioral Design specialist and use it to improve KPIs, she asked, 'But what exactly is that?' So I gave her a brilliant example something Tinder does.
Tinder plays it smart
It changes to gold when you pay.
It looks great. Premium. Exclusive.
But the moment you cancel?
It turns red again. Instantly.
Boom!
It’s not just design. It’s psychology
So
Every time you tap and see red,
you feel the loss
You’re not Gold anymore, and it hurts
The result?
People re-subscribe. A lot
No emails. Just a color change
🎉 Works
It triggers a psychological effect called Loss Aversion.
Losses hurt twice as much as gains feel good.
(Daniel Kahneman & Amos Tversky in 1979)
Case 3/5
(Less than a 30-second read)
Would you place two nearly identical buttons side by side?
Google does.
Eva is a client of the agency. She's really good at what she does
Eva asked us to design an email to encourage feedback. It's key to her business.
So I suggested adding two buttons—almost identical in text and appearance, placed side by side—just like Google does. So you keep writing more and more reviews.
Same color. Same size. Same action.
Both take you to Google Maps to write another review
He looked at me and said:
'But Daniel… two buttons right next to each other? Won’t users get overwhelmed'
Wrong. It’s brilliant.
Google uses the same tactic. It’s a game changer.
It’s not just design. It’s psychology
So
Every time you see those two buttons,
your brain believes it has control.
And that feels good
The result?
People write more reviews. A lot more
No pressure. Just the illusion of freedom
🎉 Works
It triggers a psychological effect called
The Illusion of Control.
Our brain likes to feel in charge
even when it’s not. Just an Illusion.
(Ellen Langer in 1975)
I got a +7.1% conversion lift
Case 4/5
(Less than a 30-second read)
Would you dare to add a step in a checkout flow, when everyone says to keep it short?
Well, I did.
I added a review screen right before placing the order.
It’s not just design. It’s psychology
The result?
The conversion rate increased by +7.1%
and depending on the business, that’s a lot of money.
🎉 Works
Because it’s Psychology
and I Know that uncertainty kills conversions.
I just removed it. +7.1% happened!
Achieved a -60% reduction in QA time
Case 5/5
(Less than a 30-second read)
Would you get a 60% QA time reduction by changing an email title? I wouldn’t...
But it helped me do it.
That’s the subject line of the email we sent for our dev sync. Same agenda, same time. But now devs felt it was for them. And that changed everything.
I wanted better dev deliverables. Designers were frustrated, but devs wouldn’t share early work—they said we interrupted them. So I changed the meeting title and email subject to make it feel like it was for them. It worked.
It’s not just design. It’s psychology
The result?
Developers started accepting meetings and asking more questions.
It was one of the small changes that helped us cut QA time by 60%.
🎉 Works
It triggers a psychological effect called
Framing
How you present something changes how it’s perceived.
Same meeting. Same people. Just reframed—and it felt completely different.
(Daniel Kahneman & Amos Tversky in 1981)
Take control and unlock new business opportunities with me! You don’t need to be a tech giant to harness the power of 🎓behavioral science—and still get their results.
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Improve your digital products
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Boost your KPIs
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Gain an edge over your competitors
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Train your teams
Or maybe just because you’re curious.
And curiosity—more than laughter—is what makes us human.
No commitments at all
Knowledge
Sharing
If you want to learn more about how these and other companies are applying Behavioral Design, I break it down for you in detail through some of the cases I've published
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