Independent software company

Useful software,
built with taste.

Kichijōtech is the company behind Centful, Prepster, and the products that follow. We build software for people and businesses, then stay close enough to operate, refine, and stand behind what we ship.

Product-led first. Selective client work. Long-term ownership.

One roof for the products we mean to keep improving.

Kichijōtech is not a holding page for ideas. It is the operating home for the apps and software services we actually build. That means tighter product taste, better follow-through, and fewer fake promises.

Two very different products, one shared standard.

Both products are opinionated, actively developed systems, not mock brands waiting for content.

Private iOS build Personal finance

Centful

A calmer personal finance app built around transaction review, bank sync, and rule-driven automation, rather than noisy dashboards.

  • Direct bank syncing with Plaid
  • Review queue for uncategorized spending
  • Regex-based rules for merchant automation
  • AI-assisted rule creation from plain language
Live web product Career software

Prepster

An interview preparation system that starts from a reusable candidate profile, then generates tailored prep for real interviews instead of generic advice.

  • Profile-first interview prep workflow
  • AI-assisted answer drafting for core questions
  • Tailored prep spaces per interview
  • Freshness-aware prep generation across devices

What we optimize for.

Calm interfaces

We want software to lower cognitive load, not create it. Clear hierarchy, better defaults, and less theatrical chrome.

Honest systems

Black boxes are sometimes useful, but trust comes from inspectable behavior, understandable flows, and predictable edges.

Long-term ownership

We build with the assumption that we will still be maintaining the product later. That changes architecture, product scope, and taste.

We also take on select software work.

Kichijōtech is product-led, but we do partner with customers and businesses when the problem is interesting and the standard is high.

01

Product engineering

Web apps, mobile products, and backend systems designed for shipping velocity without turning into a mess six months later.

02

Applied AI workflows

Pragmatic LLM features, structured generation flows, and human-review systems where AI is useful because the surrounding product is disciplined.

03

Internal tools & platforms

Operational systems for teams that need better interfaces to data, review queues, or business workflows than off-the-shelf software usually provides.

Kichijōtech is small on purpose.

The name comes from Kichijōji, a part of Tokyo associated with quiet quality, character, and craft. That framing matters to us. We would rather build a few products properly than scatter energy across ten forgettable launches.

The company exists to design, develop, and operate software services under a single, durable identity, for our own products and for carefully chosen client work.

If you want thoughtful software, say hello.

Product questions, partnership ideas, and serious software inquiries are all welcome.

hello@kichijotech.com

We aim to respond within two business days.