00 Independent app studio · Est. 2024Jakarta ⟶ Worldwide

Small software,
made with care and craft.

Kertive Studio designs and ships native iOS apps focused on everyday utility and quiet, considered design. We build small, intentional products, and refine them closely with the people who use them.

01 Studio

A small studio, focused on the craft.

Kertive Studio is an independent app studio building thoughtful, beautifully crafted mobile products. We work on things we would want to use ourselves: small, calm, and built with care.

Our work spans consumer travel tools and AI-powered business intelligence for small merchants. Different audiences, same commitment to clarity, restraint, and a design language that respects the reader.

02 How we work

Four principles we ship by.

Not a manifesto, just how we make decisions. Each principle costs us something, usually speed or scope. That's the point.

  1. P/01

    Small products, held to a high bar.

    We'd rather ship one feature that reads like a finished sentence than five that feel like a draft. Fewer surfaces, better decisions on each.

  2. P/02

    Design that gets out of the way.

    Restraint over ornament. Type, hierarchy, and rhythm do most of the work before any color, motion, or effect enters the room.

  3. P/03

    Native, deeply.

    We build on Apple platforms because the details compound. Haptics, focus, live activities, on-device intelligence, all of it adding up into an experience the user can feel.

  4. P/04

    Close to the people using it.

    Every product ships alongside a small group of real users. Their language, not ours, ends up in the interface.

03 Selected work

Products from the studio.

Two products, live and in development. Different audiences, travelers and small merchants, bound by the same standard of craft.

2024 → Live on iOS

eyetinr

A smart trip planner for people who plan with intention. Day-by-day itineraries, outfit planning, and packing lists in one beautifully designed app.

  • ClientKertive Studio
  • CategoryTravel · Consumer iOS
  • RoleProduct, design, engineering
  • StackSwift, SwiftUI, on-device ML
Case · eyetinr2024
eyetinr, smart trip planner
2025 → In development

TARA

An AI business-intelligence tool for Indonesian SME traders. It turns everyday sales data into clear, actionable insight owners can act on the same day.

  • ClientKertive Studio
  • CategoryB2B · SME intelligence
  • RoleProduct, design, engineering
  • FocusOn-device inference, plain-language insights
Case · TARA2025TARA, AI for small merchants
04 Founder

Behind the studio.

Kertive is a one-person studio, by design. Fewer hand-offs, tighter feedback, and a single point of accountability for the work.

Rudi Butarbutar, founder of Kertive Studio
Rudi ButarbutarJakarta, ID

Rudi Butarbutar

Solo founder · iOS engineer · Product designer

Apple Developer Academy alum based in Jakarta, Indonesia. Rudi founded Kertive Studio to design and ship the kinds of apps he wanted to use himself: small, calm, and built with care.

Before Kertive, he moved between design and engineering roles. That mix still shapes how the studio works today: one person carrying an idea from first sketch to shipped release, without translation loss along the way.

Based inJakarta, Indonesia
FocusiOS · Product
Since2024
05 Contact

Let's make something worth keeping.

Questions, partnerships, press, or just curious about what we're building. We read every message.

hello@kertive.space