What Is Synapp? The Super App for Brain Games & Everyday Tools

Key takeaways

• Synapp is a “Brain Games & Everyday Tools” super app built by the Vietnamese technology company Builden.
• It currently offers 18 brain games and 15 tools, with 40+ more on the roadmap.
• Product principles: free, no annoying ads, no unnecessary data collection.
• Works on web, iOS, Android, iPad and desktop with one account and synced progress.

Today's phones are full of apps we open a few times a month: one for caro, one for sudoku, one for scanning documents, one for the lunar calendar, one for removing photo backgrounds. Synapp asks a simple question: what if all those small but useful things lived in one light, clean and fun app?

What is Synapp?

Synapp is a minimal super app that brings brain games, AI-assisted everyday tools and a friendly community into one place. Every game and every tool is a “mini-app” that opens instantly, with nothing extra to install. The name blends synapse — where the brain makes connections — and sync: everything works as one consistent experience.

Three pillars

Brain games with a natural stopping point

Caro, Sudoku, Vietnamese and English word games, trivia, quick maths, jigsaw, spot-the-difference, sorting and physics puzzles — each with progressive levels, account-based progress and real-time 1v1 online matches. A “Mix” mode chains random rounds of different games into one match.

Everyday tools powered by AI

Object eraser, background remover, blemish remover, image outpainting, PDF scanner, text scanner (OCR), lunar calendar, unit converter, BMI, Focus Pomodoro, video speed, time-stamp camera and more — replacing heavy single-purpose apps.

A small, friendly community

A feed to share game moments, live chat, messaging, friends and 1v1 invites turn brain games into a healthy social habit instead of endless solo scrolling.

What makes Synapp different

• No annoying ads — a clean experience is the core promise, not a paid upgrade.
• One account, every device — levels and best scores follow you.
• Light and instant — no new download for each new game.
• One design language — learn once, use everywhere.
• Made for Vietnamese users — Vietnamese vocabulary, up-to-date local knowledge, accurate lunar calendar.

Who builds Synapp?

Synapp was founded by Khoa Huynh (Founder & CEO), whose background is in UX and user insight, with 7+ years in product management, CRM, business development and marketing, including 5+ years of leadership at Mobile World Group and Coolmate. It is built by BUILDEN JSC in Ho Chi Minh City, whose team also built WordFight, a real-time 1v1 word-chain game with about 15,000 monthly active users (October 2026) growing roughly 40% a month, backed by Google Cloud for Startups, Cloudflare for Startups and angel investors.

Vision

Synapp aims to become the leading clean mini-app platform for Vietnamese users: 100+ games and tools, all in one app.

FAQ

Is Synapp free?

Yes. All current games and tools are free, and Synapp does not insert annoying ads into the experience.

Which devices does Synapp support?

Web browsers on phones and computers, iOS, iPadOS and Android.

Which company makes Synapp?

BUILDEN JSC in Ho Chi Minh City, Vietnam, founded by Khoa Huynh.

Can I play with friends?

Yes. Most games support real-time 1v1 or co-op play, private rooms and the multi-game Mix mode.