Booking flows
Service, staff, date and time, with live availability, and a confirmation sent back into the chat.
LIFF app development
LIFF (LINE Front-end Framework) opens your web page inside LINE with the customer already known by their LINE profile: no app to download, no account to create. We build LIFF apps for booking, membership, ordering and forms, and the backend they rely on.
What we build
Web apps that open right inside the chat.
Member cards & points
A digital member card, points and rewards that customers open from the rich menu.
Catalogues & ordering
Products, options and a cart, with the order passed to your own system.
Forms & registration
Sign-up, consent, warranty and enquiry forms with fewer fields to type, because LINE already knows who is asking.
Verified identity
The LINE login token is checked on your server before anything personal is shown or changed.
Backend & integration
The API behind the app, connected to your CRM, POS or booking data.
As of October 2026
LIFF in 2026: two things to know.
LINE’s own developer news has two points that matter for a LIFF project this year:
LINE MINI App development- LINE recommends creating new LIFF apps as LINE MINI Apps, and plans to bring LIFF and the LINE MINI App together under one brand.
- After a security issue in the LIFF SDK, LINE asks every LIFF app to update to SDK version 2.31.1 or later, and plans to restrict versions 2.20.0 to 2.31.0 around 24 November 2026.
Source: LINE Developers news, 12 February 2025 and 20 October 2026 (developers.line.biz/en/news/). Checked 29 October 2026.
How a project runs
- 01
Flow & screens
The steps the customer takes, designed for a phone screen inside LINE.
- 02
Build the app & API
The LIFF front end and the backend it calls, with the LINE token checked on the server.
- 03
Test inside LINE
On iPhone and Android, in the LINE app and in an external browser.
- 04
Launch & keep current
Live from your rich menu, with SDK updates as LINE releases them.
Proof
A LIFF app in production.
FoxConnect’s booking app is a five-step LIFF flow that salons, clinics and spas use every day.
FAQ
Questions we get asked.
What is a LIFF app?
A LIFF app is a web app that opens inside LINE through the LINE Front-end Framework. It can read the customer’s LINE profile with their consent, send messages to the chat and close back to the conversation.
Should we build a LIFF app or a LINE MINI App?
They use the same web technology. A LINE MINI App adds its own channel and, once verified, LINE search and home-screen shortcuts. As of October 2026, LINE recommends creating new LIFF apps as LINE MINI Apps, so we usually start there.
Do customers have to log in?
No. LIFF identifies the customer by their LINE account after they agree once, so there is no separate password or sign-up.
Can you take over an existing LIFF app?
Yes, after a look at the code. A common first step is updating the LIFF SDK to a current version and checking that the login token is verified on the server.
Tell us what your LIFF app should do.
Describe the flow your customers need. A person replies by email and we set up a call.
Start a project