Northline Studio NS
Design studio · Est. 2016

We design digital products people love to use.

A small team of product designers and researchers helping ambitious teams ship thoughtful mobile and web experiences.

Featured Work

Featured Case Study

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Streamline app on an iPhone
Case Study · 2024

Streamline iOS App

The Challenge

Streamline had powerful training features buried under a cluttered interface. New users dropped off before finishing a single workout, and support tickets kept piling up.

Our Solution

We rebuilt the experience around a single daily focus screen, progressive onboarding, and a calmer visual system — surfacing the right workout at the right moment.

My Role

Lead product design — research, UX flows, UI system, prototyping, and design QA alongside a two-person engineering team.

Timeline

14 weeks from kickoff to App Store release, with weekly user testing cycles and a soft launch to 500 beta testers.

Outcomes

The redesign turned retention around within one quarter:

+62%Workout completion
4.9★App Store rating
−41%Support tickets
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Process

How Streamline came together

1

Research

We interviewed 14 active users and audited 400+ App Store reviews to find the moments that made people give up.

Research notes and charts
Interview synthesis & review mining
2

User Flows

We mapped every path from open to completed workout and cut the average flow from 7 screens to 3.

User flow diagram
Simplified core journey map
3

Wireframes

Lo-fi layouts tested weekly with the same five users until the structure clicked on the first tap.

Wireframe sketches
Wireframe annotations
Round 3 of 4 — annotated & tested
4

Prototypes

Interactive hi-fi prototypes for onboarding, daily focus, and stats — validated with 500 beta testers.

Prototype screen one
Prototype screen two
Prototype screen three
Beta build v0.9 tap-throughs
5

Final iOS Interface

The shipped design system — calm surfaces, one clear primary action per screen, and data only when it matters.

Today · Session detail · Progress

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