Kōten Studio
Web · Mobile

Oktapus

Loyalty cards

Oktapus is a loyalty card that lives in an app: the shop taps its contactless card on the customer's phone, or scans the code the customer shows, and the card fills up. Kōten Studio builds it in-house; it is live at oktapus.app and was called Fideloop until October 2026.

oktapus.appReact Native · Next.js · Supabase
Oktapus, Loyalty cards

Why it exists

A loyalty card only works if the customer has it on them. A paper card gets lost, and it tells the shop nothing about who comes back.

Oktapus gathers all of a customer's cards in a single app, and gives the shop a one-second gesture at the counter.

What we built

For customers, an app where each shop has its own card, with its name, its colour and its reward. The customer adds it by scanning the shop's poster.

For shops, Oktapus Pro, on the phone or tablet they already own: they tap their contactless card on the customer's phone, or scan the customer's code. Every stamp shows up in a dashboard, with the date and the team member who gave it, and a mistake is undone in one gesture.

How we worked

The product started by putting the card in Apple Wallet and Google Wallet. The limits of those two wallets, starting with very poor notifications, moved us to a full app.

We built first what has to work perfectly before anything else: giving the stamp, seeing it reach the customer, and being able to correct it.

Where it stands

Oktapus is live at oktapus.app, with a free plan to start and a paid plan that adds the contactless card, at prices published on the site. It works in every country and in nine languages. The apps are coming to the App Store and Google Play; until then, the website takes over at the counter.

It is one of our own products, built and run in-house.

Built with

  • React Native
  • Next.js
  • Supabase

Oktapus is built with React Native and Next.js on Supabase: an app for customers, an app for the shop, Oktapus Pro, and a website that also serves as a fallback at the counter. Most of the work is in the moment the stamp lands: it has to arrive within a second, with the contactless card as with the scan, and stay right even when the network drops.

Frequently asked questions

What is Oktapus?

Oktapus is a loyalty card that lives in an app. The shop taps its contactless card on the customer's phone, or scans the code the customer shows, and the stamp lands. Customers find all their cards in one place.

Do my customers need to install an app?

Yes, the Oktapus app, once, for every shop that uses it. It is coming to the App Store and Google Play; until then, customers can show their code from oktapus.app.

How much does Oktapus cost?

A free plan lets you start, with no bank card. The paid plan adds a contactless card sent by post. Prices are published on oktapus.app.

Are Fideloop and Oktapus the same thing?

Yes. Fideloop was renamed Oktapus in October 2026: same product, same team.

All our work

Planning something similar?

We build our own products and our clients' projects the same way. Tell us what you have in mind.