Product talk
What makes a mobile app worth $50?
How onboarding, paywalls, progress systems, and retention mechanics change the value of a mobile product.
By Serhii Kopytchuk, iOS software engineer and founder of Knockout
The question behind the talk
Knockout began as a useful boxing timer. The product worked, but usefulness alone did not explain why someone would consider paying $50 for it.
That question changed the roadmap. Instead of asking which feature to add next, I started looking at how successful mobile products create commitment, communicate value, and make progress visible.
This talk shares the practical lessons from that process: what I applied to Knockout, what is still an experiment, and what other mobile teams can test in their own products.
Key takeaways
What you will learn
Start with perceived value, not feature count. See how a pricing question can expose gaps in the product experience.
Use onboarding to create relevance. Connect personalization and user commitment to the experience that follows.
Make the paywall explain the product. Communicate value, trust, trial expectations, and plan differences clearly.
Design progress people can notice. Use levels, streaks, achievements, and progress states to make improvement visible rather than decorative.
Build a reason to return. Connect each next action to a meaningful goal instead of adding engagement mechanics at random.
Full deck
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Sources and references
The talk separates product observations and active experiments from released Knockout behavior. These public sources support the external product examples used in the deck.
Speaker
About the speaker
Serhii Kopytchuk is an iOS software engineer and the founder of Knockout. He is building Knockout from a boxing timer into a structured training product and uses the project to study onboarding, monetization, and retention in practice. His work focuses on turning product research into concrete mobile experiences.
Knockout
See the product behind the case study
Knockout is a boxing training app for iPhone that combines a structured plan, technique demonstrations, guided rounds, and visible progress.
Speaking inquiries
Bring this talk to your event
The talk is designed for mobile developers, indie founders, and product teams. Invite Serhii for a meetup, conference, company session, or product community event.