Do small product details determine whether an app is merely good or truly great?

Harry Stebbings · Jun 26, 2023

Details are the product

19:04 20VC: Eight Pieces of Startup Advice that are BS: Why You Do Not Have to Love Your Space, It Is Ok To Do It For The Money, Focus Is Not Everything, Speed Is Not The Most Important Thing with Akin Babayigit, Co-Founder @ Tripledot Studios

Harry Stebbings · May 19, 2025

The details are not the details — they are the product

Scope: cited as Gustav Soderstrom's formulation, which Harry says he feels when using Duolingo

27:28 20VC: Duolingo Co-Founder on Why $3M is Harder than $100M to Raise | Why You Should Always Take Tier 1 VCs Even at Worse Terms | Why Europe Can't Win Unless the US Screws Up | How AI Impacts the Future of Work and Education with Severin Hacker

Harry Stebbings · Jun 20, 2025

The details are not the details — they are the product.

Scope: stated as a maxim about consumer product building

5:58 20Product: How Duolingo Build Product 10x Faster with AI | Duolingo's Biggest Lessons on Paywalls, Push Notifications and In-App Purchases | Why Small Teams are the Future of Product | Why PMs Will Become Extinct with Cem Kansu, CPO @ Duolingo

Cem Kansu · Jun 20, 2025

Consumer products live and die in the pixels — anyone working on the product must understand pixel-perfect design and what users will see.

Tiny visual choices, like a dark versus light shade of green on a button, measurably change user behavior, so the people building the product need to understand what those choices mean.

Scope: specific to consumer products

6:27 20Product: How Duolingo Build Product 10x Faster with AI | Duolingo's Biggest Lessons on Paywalls, Push Notifications and In-App Purchases | Why Small Teams are the Future of Product | Why PMs Will Become Extinct with Cem Kansu, CPO @ Duolingo

Severin Hacker · May 19, 2025

Product quality is details, and the difference between a good app and a great app is entirely details

Details show up directly in retention — the metric they care most about — and in whether users recommend the app to friends, even though users can't articulate details as the reason

27:59 20VC: Duolingo Co-Founder on Why $3M is Harder than $100M to Raise | Why You Should Always Take Tier 1 VCs Even at Worse Terms | Why Europe Can't Win Unless the US Screws Up | How AI Impacts the Future of Work and Education with Severin Hacker

Cem Kansu · Jun 20, 2025

The streak — and specifically the small sensory details that make it exciting — is one of the biggest drivers of Duolingo's retention

The flame animation, haptic and sound make the streak feel important, and every tiny detail that makes it more exciting has measurably improved retention; the streak is the mechanic that instills the daily habit

55:18 20Product: How Duolingo Build Product 10x Faster with AI | Duolingo's Biggest Lessons on Paywalls, Push Notifications and In-App Purchases | Why Small Teams are the Future of Product | Why PMs Will Become Extinct with Cem Kansu, CPO @ Duolingo