Emi Kobayashi

Tripmix · Case study

Two travellers looking at a phone in an airport

Case study · UX design · AI product

Tripmix

A travel app where anyone can plan, share and sell trips, taken from first idea to the App Store.

Role
Founding and principal product designer
When
Jan 2024 to Nov 2025
Launched
App Store, July 2024
Built with
Figma, Bravo Studio, Xano, OpenAI Agent Builder

Section 1

Measurable outcomes

I shipped the creator storefront and won the founders over to hosted trips. When hosts arrived, sales took off: they sell $2K trips on Tripmix, and Tripmix earns a commission.

App Store impressions, November 2025
8,070
App Store conversion rate
7.24%
sessions per active device
3.39
of downloads came from App Store search
59%
downloads in November 2025
450
countries those downloads came from
5
The Tripmix app

Section 2

Every traveller a creator

Tripmix lets you discover, plan and share trips, powered by AI and itineraries from its community, and lets passionate travellers sell what they know.

As founding designer I defined the product roadmap, scoped backend requirements and led the design team, owning the whole lifecycle from concept to App Store launch.

  • A $1.8 billion global travel itinerary app market
  • Launched on the App Store in July 2024
  • 500 downloads in the first month
Tripmix discovery research
Tripmix discovery research, continued

Section 3

Following the money

We interviewed emerging travel influencers, studied the trip before, during and after, and ran a SWOT and competitor comparison to find the gaps.

The founder wanted a marketplace for influencers. I made the case early that hosted group travel was the stronger business, and showed the numbers.

  • A $10 to $15 PDF itinerary needs huge volume to matter
  • One hosted trip, 8 to 12 people at $2K to $5K each, earns $24K to $60K
  • The founder kept both paths, and I committed to delivering both
Thatch, Mindtrip and Tripmix compared

Section 4

Two leaders, one gap

Thatch owned blogger monetisation and Mindtrip had a head start on AI planning. Tripmix combined both. In 2025 Mindtrip acquired Thatch.

  • Creators juggled four tools: TikTok, Linktree, Notion or Wanderlog, and Stripe or Thatch
  • The unit economics favoured hosts, and no one served them directly yet

Section 5

Solo planning isn't broken. Group travel is.

For half a year I kept making the case, with numbers, competitor analysis and my own field research. People enjoy planning solo trips and often just ask AI.

Group travel was chaos: coordination scattered across WhatsApp threads and improvised Google Sheets, with no tool owning it.

The founder came on board, we interviewed hosts already leading trips, and they loved having every customer touchpoint in one app. Tour guides and operators now sell full group trips on Tripmix.

Prioritisation with AARRR and an impact versus effort matrix
Tripmix wireframe sketches
Prioritisation, and early wireframes.

Section 6

Ranked, then sketched

We brainstormed in FigJam, ranked ideas with AARRR (acquisition, activation, retention, revenue, referral) and sorted them on an impact versus effort matrix.

  • Led prioritisation and owned the product roadmap
  • Designed app screens hands-on with the developer
  • Mentored two junior designers
  • Kept testing ideas with travellers in my own network
Tripmix build pipeline from Figma to the live app

Section 7

A full app, no traditional front end

Bravo Studio turns Figma prototypes into production React Native, so I tagged every layer for Bravo and bound the UI straight to the database.

  1. Figma. Screens tagged to Bravo's requirements.
  2. Bravo Studio. UI elements bound to a no-code database.
  3. Xano. Database tables and API endpoints.
  4. OpenAI Agent Builder. Intent detection and routing, in a custom chat widget.
Agent architecture: a master agent routing to creator, traveler and host agents

Section 8

One chat, three paths

An in-app chat detects what you want and routes you to one of three personas, each with its own agent and its own result.

  • Travel creator. Public, sellable travel plans.
  • Traveller. Private, dated itineraries.
  • Host. Group packages, with extra screens to prepare travellers.
  • Separate contexts, conditional paths and modular agents keep it easy to update
The shared Tripmix bug tracker

Section 9

Triage, then launch

Every issue went into a shared tracker with severity, details, owner and status. I triaged with the team and we cleared every blocker before launch.

After launch, App Store analytics showed engagement and drop-off, and interviews explained why. We measured task success three ways:

  • Completion. Did people finish what they set out to do?
  • Errors. Where did they struggle?
  • Efficiency. How long did key actions take?

Section 10

Onboarding, AI trips and the travel shop

The AI builds an itinerary from almost anything: social posts, blog links, video clips, images or plain text.

Your profile holds your trips, saved experiences and your travel shop, a Stripe-powered storefront where others can buy your itineraries.

Section 11

Clearer trip cards

Prices sat on both sides of the cards, icons were confusing and the avatar was often missing. The fix: the avatar always shows, and plain public and private tags replace the icons.

Before

Old trip card with a confusing globe icon and no avatar
Old trip card with a shop icon instead of the avatar
Old trip card with a confusing bag icon
A globe icon, a shop icon in place of the avatar, and a bag icon.

After

Redesigned trip cards with avatars and public or private tags
Redesigned trip card detail
The avatar is always there, with public and private tags instead of icons.