AnotherBall Is a Gold Sponsor of DroidKaigi 2026!

Table of Contents
  1. Event Details
  2. We Build a Live Streaming App Called Avvy
  3. September 3, 12:20, Meerkat
  4. Your Avatar, Printed on the Spot
  5. Come Talk Shop
  6. We’re Hiring

Hi there! We’re the mobile engineering team at AnotherBall.

AnotherBall is a gold sponsor of DroidKaigi 2026!

We’re bringing a booth too! You can build an avatar in Avvy and walk away with an instant photo of it. And on September 3 at 12:20, RIO (@rioX432) from our mobile team takes the stage in Meerkat.

Event Details

  • Official site: DroidKaigi 2026
  • Dates: Tuesday, September 1 – Thursday, September 3, 2026
  • Venue: Bellesalle Shibuya Garden (Sumitomo Fudosan Shibuya Garden Tower 1F / B1, 16-17 Nanpeidaicho, Shibuya-ku, Tokyo 150-0036)
  • AnotherBall booth: September 2 (Wed) and 3 (Thu)

We Build a Live Streaming App Called Avvy

We build Avvy, a VTuber avatar and live streaming app: build a 2D avatar on your phone alone, then start streaming with no camera and no gear. You combine 2D illustration parts into an original avatar, and the phone camera tracks your face and expressions to drive it. Viewers send gifts during a stream to cheer the streamer on.

Avvy's avatar builder and streaming screen (from the official Avvy site)

Here’s what the Android side runs on. Business logic is shared with iOS through Kotlin Multiplatform (KMP), the UI is Jetpack Compose, avatar rendering runs on Unity as a Library (UaaL), and face tracking goes through MediaPipe. A game engine and native UI share one app, so we hit walls a typical app never runs into.

Our last conference sponsorship was Kotlin Fest 2025, where we came in at the silver tier.

September 3, 12:20, Meerkat

RIO is talking about a wall we hit in Android face tracking.

Face tracking accuracy shows up directly in the quality of the avatar’s expression. When the streamer smiles, does the avatar on screen smile the same way? The user experience turns on that, so once we knew the accuracy wasn’t there, turning back wasn’t an option.

The session is aimed at:

  • Engineers already using MediaPipe in an Android app, or weighing it up
  • Anyone hitting ML inference or sensor data whose quality varies from device to device
  • Anyone curious about face tracking or motion capture
  • Anyone after patterns for abstracting hardware-dependent features in KMP

Your Avatar, Printed on the Spot

The centerpiece of the booth is building your avatar in Avvy.

Pick a hairstyle, then eyes, then an outfit, and you have your own avatar. Switch to camera mode, make a face, and take one shot — the avatar makes the same face. That photo gets printed right there as an instant photo in a DroidKaigi 2026 original design, in a sleeve you can attach to your name card.

The instant photo and holder you take home, plus the AnotherBall sticker we hand out (sample)

Start to finish it takes about five to six minutes. If you’re short on time, grabbing a sticker and moving on is completely fine.

Every staff member is wearing an instant photo of their own avatar on their name plate. Engineers will be there too!

Come Talk Shop

Posts the mobile team has written so far.

If any of them catch your eye, come find us at the booth. How we embed Unity in a native app, how we build the real-time side of live streaming — getting into that with people who find it interesting is the best part of showing up at a conference.

Come build your avatar, come talk to us at the booth. The mobile engineering team will be at Bellesalle Shibuya Garden on September 2 and 3 — see you there!

We’re Hiring

AnotherBall is looking for mobile engineers who want to build apps with Kotlin, Unity, and AI. We’re picking up KMP and Compose Multiplatform as we go, and we’d love to grow the product together.

Grab a staff member at the booth, or apply through the links below.