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How dating apps keep you engaged (not romantically)
The design equivalent of clickbait headlines
How Hinge leverages social scarcity
Hinge has one of the most self-defeating taglines in product history.
"Designed to be deleted".
The implication is that they're the honest dating app. They want you to find someone, leave, and never come back.
And it resonates. In 2025, the number of paying users grew by 16.5%, while revenue disproportionately jumped by 26%.
In other words, they're getting better at persuading users to spend money. How have they done this? Clever design.
This case study isn't about the business model of dating apps (they do need to make money somehow).
It's about the specific ways that the interface is designed to keep you inside a cycle.

An aha moment isn't praise. It's the moment a new user recalculates what they'll get from your product. Twitch gave me a badge instead. Here's the fix.
Why praise isn't an Aha moment (and what is)
How "muddling" stops people finding your best features
Techniques for reducing the cost of trying something new

A behind the scenes look at how I redesigned the Built for Mars sign-up flow, and iterated from early feedback.
The two "obvious" fixes that did nothing
Why you shouldn't always force an input
Why limiting the user's choices can be beneficial
The challenge for a navigation app isn't to efficiently show you the best route, it's to make you believe that you've found the best route.
How strategy influences design
Waze is cornered, and slowly shrinking
What Apple's strategy appears to be

From rat mazes to coffee apps: why the motivation to reach a reward increases the closer your users get to their goal.
How to use the Goal Gradient Effect
Spinning the flywheel of purchases
Why your rules need to be clear
Sometimes, the best onboarding is no onboarding, and simple products get bogged down with unnecessary explanations. This case study on Waitrose, Sainsbury's and Asda demonstrates when to just let the user try it for themselves.
Sometimes the best onboarding, is no onboarding
“Show, don’t tell” often beats education
Data can’t always tell you when onboarding is wrong

An analysis of Monzo’s 1p challenge, focusing on the middle slump, where progress slows and motivation quietly fades.
Delight can replace progress, but only temporarily
"The middle" is the real retention problem
Motivation needs contextualised reference points