Understand
Before deciding what to build, we learn how the work actually gets done. We measure where things stand today and agree the KPIs this software should move.
Platform apps and integrations
LINE Mini App development
Membership cards, mobile ordering, reservations and stamp cards. We take a LINE Mini App from planning through development, LY Corporation's review, release, operation and improvement. Your customers don't need to install anything.
Who this is for
- You want to move store membership or point cards into LINE
- You want to take mobile orders, reservations or queue sign-ups in LINE
- You want to rebuild an existing LIFF app as a LINE Mini App
- You need to get through review as a verified mini app
- You want member and order data connected to your POS or core systems
Common problems
Verified or unverified?
Unverified mini apps can be published without review, but verified ones get far more features. Choosing wrong costs time later.
The review requirements are hard to follow
Channel description, privacy policy, icon and performance guidelines: many items are checked, and a rejection delays release.
Member data lives apart
LINE member information is managed separately from customer data in POS, e-commerce and CRM.
Improvement stops after release
SDK updates and policy changes pile up, and the app stays exactly as it was built.
What we deliver
Planning and requirements
After understanding the work and the people who will use the app, we decide the features, verified or unverified, and the schedule to release.
Development
The LIFF front end, server and admin screens, from user authentication to service messages.
Review preparation
Channel description and supporting documents for review, a pre-check against LINE's checklist, and handling any rejection.
System integration
Connections to POS, e-commerce, CRM and your LINE Official Account, so member and order data live in one place.
Operation and improvement
LIFF SDK updates, keeping up with policy changes, and measuring usage to improve the app.
How we work
From understanding your work to making the software stick and improving it — eight steps, with AI at every one. Hire us for all of it, or just the step you need.
Build
We build in short cycles and check each one against real work early, so the budget goes into what actually matters.
Grow
Software only creates value once it's in use. We make it stick, measure what changed, and keep improving — until your own team can run it.
Why work with us
KPIs before code
We agree what success looks like before we start, and check it in numbers after launch.
Product people, not order-takers
We build, ship and run our own products, so we think like the owner — and we'll push back on features that won't pay off.
Deep in your business
We learn how the work really happens before deciding what to build — including whether to build at all.
In use, running smoothly
Rollout, training, maintenance and improvement are part of the job. Software nobody uses creates nothing.
You're never locked in
We leave the know-how with your team. Keep us on, or take it over — your choice.
How we measure the result
When work gets faster, the time saved is quickly filled by other work — and unless someone measures it, the value the software created simply disappears. So we measure the same process before and after, and you can see exactly what changed.
- Member sign-ups and how often the membership card is used
- Store-side handling time per order or reservation
- Repeat rate and visit frequency
- Effort that used to go into paper cards and phone bookings
FOR ENGINEERS
For engineers
A LINE Mini App is a web app running on LIFF
Underneath it is a web app, so ordinary web technology applies. Each channel has three environments, for development, review and production, each with its own LIFF ID. LINE recommends building any new LIFF app as a LINE Mini App.
Verify the user on the server
The client gets an ID token with liff.getIDToken() and sends it to the server, which verifies it with LINE's verification endpoint. We never trust profile values sent straight from the browser.
Service messages
Notices such as reservation confirmations and reminders go out as service messages, available to verified mini apps. Only reviewed templates can be used, at most five per user action, and never for advertising. Promotional messages go through your LINE Official Account.
Payments
LINE Pay ended in Japan on April 30, 2025. Payments for goods and food are built as standard web payments; for digital content we consider in-app purchase on a verified mini app.
Quality and security
We measure against LINE's performance guidelines, which recommend a Lighthouse performance score of 50 or more, and follow LIFF SDK security notices to update when needed.
How we use AI
AI speeds up design, implementation and testing, which keeps time and cost down. People review the code AI writes, and only code that passes its tests is released.
Deliverables and handover
- All source code, which can live in your own Git repository
- LINE Developers channels created under your own provider
- Design documents, integration specifications and runbooks
- Everything submitted for review
- Training, if your team takes over operation
First step and contract options
Start by telling us what you want to offer in LINE and how the work runs today. From there we begin in one of two ways.
Plan and design
We set out the features, verified or unverified, the systems to connect, and a schedule including review, with a rough cost.
Try it as an unverified mini app
Without waiting for review, try it with some stores or customers, confirm the results, then aim for verification.
Contract options
Fixed-scope contracts that deliver an agreed scope, or time-and-materials engagements for ongoing development and improvement. We do both.
Frequently asked questions
Can an individual publish a LINE Mini App?
Individuals can publish unverified mini apps. A verified mini app must belong to a company or a registered sole proprietor.
How long does review take?
LINE's guidance is about one to two weeks, plus a few more days for a resubmission after rejection.
Can our existing LIFF app become a mini app as it is?
A LIFF app created on a LINE Login channel can't be moved to a LINE Mini App channel. It has to be set up again on a new channel, though most of the web app itself can be reused.