Hey everyone,

Tomorrow is the AMA with u/skydoves (Jaewoong Eum). Yesterday I wrote about how long he's been part of this subreddit. Today I want to cover what he's been working on lately, because a lot of it is directly useful if you're in the middle of Shipaton.

Most of his year has gone into Compose performance. He built the Compose Stability Analyzer, an IDE plugin that shows you which composables are skippable and which parameters are dragging them down. Then he added a live recomposition heatmap that overlays real counts from your running device on top of your source. The most recent version tells you whether the compiler's stability predictions actually hold up at runtime.

He's also been working on hot reload. Compose HotSwan brings Compose hot reload to real Android devices with your navigation stack and state left intact, and he's since got it running across several devices at once. In June he shipped a plugin that draws your whole app flow as a map of rendered previews and typed arguments, which went down very well here. There's also a set of agent skills for Compose performance and a way to tune animations without rebuilding the app every time you change a value.

Since joining RevenueCat he's been open sourcing the UI you need around a paywall. Placeholder loading effects. A slide to unlock component for Compose and KMP. A collection of paywall animations. A complete working paywall wired up to Play billing through the RevenueCat SDK.

Every Shipaton entry has to use that SDK for at least one purchase, and he's the one who has been building the Compose side of it in public. If you're stuck on a paywall, or on anything else, tomorrow is your chance to ask.

Please don't post your questions in this thread. Wait for the AMA post from u/skydoves tomorrow and ask them there.

If you missed them, the Shipaton announcement has the details and the first megathread is where people are posting what they're building. Submissions close on 30 September, so there's still time.

Don't miss the AMA tomorrow, Wednesday 19 August, 11:00 UTC. 13:00 Berlin, 12:00 London, 07:00 New York, 04:00 San Francisco, 16:30 Delhi, 20:00 Seoul, 21:00 Sydney, or here it is in your own timezone.

See you there.

Hey everyone,

RevenueCat is bringing back Shipaton, its annual mobile app hackathon, and r/androiddev is joining as an official Build-in-Public community.

The premise is straightforward: build a new app, ship it during the hackathon window, and share what you’re working on along the way.

The key requirement is that you must ship a brand-new app between August 1 through September 30, 2026 to participate.

You can learn more and enter here: shipaton.com

What is Shipaton?

Shipaton is a mobile app hackathon built around one simple goal: getting people to actually ship.

It’s for Android developers, indie app builders, and anyone who has had an app idea sitting in their notes app for too long.

You’ll have two months to build and submit a new app. Along the way, participants can share progress, ask for feedback, and get help from other builders.

Participants will get access to the Ship Kit, which includes credits, tools and discounts to help you build faster, and will be able to compete for over $1,000,000 in prizes, including cash, funding opportunities, Billboards in Times Square, and more.

Why r/androiddev?

Because building and shipping Android apps comes with a lot of very specific questions:

• Is this architecture going to hold up?
• Am I overcomplicating the stack?
• Is this UX clear enough?
• What should I cut so I can actually ship?

During Shipaton, this subreddit will be a place for Android builders to share progress, ask questions, and get feedback, before the submission deadline.

What will happen here?

We’re planning a few Shipaton-related threads during the event:

• A launch / announcement thread
• A “What are you building?” check-in thread
• A final-push feedback thread closer to the submission deadline
• An upcoming AMA with Jaewoong (u/SkyDoves) from RevenueCat, where you can ask questions about your Shipaton project, RevenueCat, implementation details, or anything else you’re trying to figure out

What should you post?

You don’t need a polished demo or a launch-ready app to participate. Early, messy updates are welcome.

Requirement: on r/AndroidDev we’ll only be accepting posts and comments regarding native Android Apps or Kotlin Multiplatform Apps.

A good Shipaton post might include:

• What you’re building
• Who it’s for
• What stack you’re using
• What you’re stuck on
• What kind of feedback would actually help

Screenshots, demos, prototypes, architecture questions, monetization questions, and “is this a terrible idea?” posts are all fair game, as long as they have the Shipaton flair and follow the other subreddit rules.

How to enter

You can enter Shipaton at: shipaton.com

Keep an eye out for the Shipaton threads here in r/androiddev. Happy shipping!