BIGasLIFE Logo
BIGasLIFE Logo

Play and learn, just as you are.

When learning feels like play, what you had given up on comes within reach.
BIG as LIFE gives that experience a shape: apps and web services, from concept through to day-to-day operations.

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What I can build

Mobile app development

Native iOS (Swift), Flutter and React Native. Five apps shipped to the stores across these three technologies, all still actively updated.

  • Swift
  • Flutter
  • React Native
  • Expo

Backend and infrastructure

Server side built in TypeScript, centred on Firebase (Auth, Firestore, Cloud Functions). From data modelling through to running it in production.

  • TypeScript
  • Firebase
  • Cloud Functions
  • Firestore

AI features

Scoring and feedback features built on the OpenAI API, from design to implementation, including prompt design and tuning the quality of the output.

  • OpenAI API
  • Prompt Design

Operations and improvement

Error monitoring with Sentry, analytics, store submission and review handling. Shipping is the start, not the finish.

  • Sentry
  • Analytics
  • App Store / Google Play

About us

Everything BIG as LIFE makes starts from curiosity: "this could be fun", "what happens if we bring in this new technology?"

What matters most is the joy that comes from growth and discovery: being able to do what you couldn't before, having your horizons widened by a new experience, seeing the world differently after a small realisation. That spark is what we want to deliver, in the shape of an app.

That is also why shipping is never the end. Once an app is in the store it gets measured, fixed and grown. Taking on everything from concept to operations is the only way that value actually reaches anyone.

Works

リプレン
リプレン
A practice app for understanding, organizing, and responding with your opinion. From everyday conversation to debates and interviews, train your ability to understand others' opinions and organize and communicate your own thoughts with AI feedback. With 5 difficulty levels and a wide range of topics, from 3rd graders to adults can improve logical thinking and communication skills while having fun.
  • React Native (Expo)
  • TypeScript
  • Firebase Auth
  • Cloud Firestore
  • Cloud Functions
  • OpenAI API
  • Algolia
  • Sentry

Scope: Concept / UI design / App / Backend / Operations

ことばの芽
ことばの芽
No more worrying about what to say to your baby. Get 'phrases you can use now' for each scene in Japanese and English. Introducing 'phrases you can use now' in Japanese and English for daily scenes such as feeding, sleeping, and diaper changing. Make communication with your baby more fun and enriching. Your words will nurture the 'seeds of language' for the future.
  • React Native (Expo)
  • TypeScript
  • Firebase Realtime Database
  • Firebase Analytics

Scope: Concept / UI design / App / Operations

Agetene
Agetene
A guest-participatory wedding web app where you can have fun while preserving memories. Guests upload photos and videos and compete for points in a team competition. The perfect web app for those who want photos with old friends and family, and for those who want lots of wedding photos.
  • React
  • TypeScript
  • MUI
  • Cloud Firestore
  • Cloud Functions
  • Sentry

Scope: Concept / UI design / Frontend / Backend / Operations

AnimalLine
AnimalLine
A simple puzzle game where you line up animal icons. Perfect for training logical thinking skills and the ability to predict what others are thinking. Additionally, there is a two-player mode, so you can enjoy it with friends and family during short waiting times.
  • Flutter
  • Dart
  • Riverpod
  • go_router
  • Cloud Firestore
  • Firebase Auth

Scope: Concept / UI design / App / Operations

TORECTA
TORECTA
A completely free block puzzle game! Arrange blocks to form squares and clear them to aim for a high score. Compete with players nationwide in the season-based 'TORECTA Grand Prix' rankings. A game perfect for both those who want to play casually and those who want to play seriously, with simple controls and deep strategic gameplay!
  • iOS Native
  • Swift
  • Firebase Auth
  • Cloud Firestore
  • Cloud Functions
  • AdMob

Scope: Concept / UI design / App / Backend / Operations

News

2026.07

Released TORECTA v4.1.
Changed the game rules to a time-attack format. You start with a 120-second time limit, and clearing squares adds time based on their size. Major updates include a new "Starry Night" background that changes with your score, animated block movement, removal of the play-count limit, and best score saving for each season.

2026.07

Released Riplen v2.2.
Improved AI feedback. Points to review are shown as quotes, paired with clear explanations and rewrite examples. The AI model has been renewed, improving scoring stability and the quality of improved example sentences. Added a dark mode that automatically follows your device's appearance.

2026.07

Released Riplen v2.1.
Added a feature to check the scoring breakdown and a feature to review the scoring criteria before you write. A "Weakness Analysis" that visualizes your weak points from past practice results has also been added. Improvement points now let you review the feedback, quotes, explanations, and rewrite examples all together.

Get in touch

Happy to talk about app or web service development.

Operator
宮本 翼
Services
Planning, development and operation of mobile apps and web services
Contact
support@bigas.life

© BIGasLIFE 2026