01
Create using AI
Tell Custapp what you want in simple words. The AI turns the request into a working app.
Custapp · AI app builder
Turn an idea
into an app.
Describe what you need. Custapp builds a real mini-app on your phone, Mac, or browser — ready to use, update, and share.
Local-firstSandboxedAI-powered
AppsAssetsExplore● AI ready
Build a cute puppy game where I can feed and play with my puppy.
✦
Got it.Creating Puppy Cute World…
Creating app2 / 3 steps
✓ App structure
✓ Puppy interactions
Validating runtime
🐶
Puppy Cute Worldyour pocket puppy 💖
🪙 120🍗 HUNGER 70%💗 HAPPY 96%
♥
🐶
Tap puppy to pet!Make this multiplayer so friends can join my puppy park.
✦
Adding multiplayer.Rooms, public parks, shared puppy sessions.
Upgrading Puppy Park3 / 3 steps
✓ Room creation
✓ Join by code
✓ Public parks
🐾
Welcome to Puppy Park!Play together with friends
ENTER ROOM CODE
🌍 Public ParksPuppyFriend’s Puppy Park · 1/6 players
Describe or change your app…
From one sentence to something you can actually use.
01 Describe it02 AI builds it03 Use it
How it works
Build. Improve. Play.
Custapp keeps the creation loop on your phone, so an idea can become a working app without switching tools.
02
Update anytime
Change behavior, UI, or features by chatting with AI again. Your app evolves without starting over.
03
Use and share
Run the result immediately, connect multiplayer experiences, and keep iterating from the same device.
One idea, many directions
Keep building after the first prompt.
The strongest Custapp flow is not just creation. Build something, change it with AI, play it, add multiplayer, and customize it again.
Create · Update · Play
Ask for an app. Then keep shaping it.
Start with simple words, let AI build the first version, then request fixes, features, or a completely new direction without leaving the app.
Create app using AIUpdate using AIReady to use
Upgrade to multiplayer
Turn a solo idea into something friends can join.
Ask Custapp to add rooms, shared sessions, public spaces, or connected game flows. Iterate on multiplayer the same way you iterate on UI.
Create roomsJoin with friendsPublic spaces
Friends can join ✦Room ZLY690 · 1 / 6 players
Very customizable
Not just games. Build tools around your own workflow.
Finance notes, trackers, utilities, dashboards, and personal tools can all be shaped around the data and actions that matter to you.
Income · ExpenseTags · FiltersInsights
NET BALANCE$1,560$4,200 in · $2,640 out
INCOME$4,200
EXPENSE$1,450
INVEST$300
⌕ Search notes, tags…
✓ Great savings!65.5% savings rate. Consider increasing investments.
BTC DCAWeekly buy · hold 2 years$300.00
Built with Custapp
Real apps, not mockups.
Games, utilities, finance tools, multiplayer worlds, and experiments can all live inside the same app-building workflow.
Sky Duel 3D
Multiplayer game
Arena 3D
Multiplayer arena
VOID RUNNER 3D
Playable endless runner
Nusantara RPG
RPG experiment
Todo List
Productivity
Finance Notes
Money notebook
Puppy Cute World
AI-built virtual pet
Brawl Arena
Connected multiplayer flow
See it evolve
One prompt is only the beginning.
Move through the same loop you use in Custapp: describe an idea, get a working app, change it with AI, and make it multiplayer.
9:41custapp•••
Puppy Cute GameAI builder
Creating app✓ UI✓ Interactions● Runtime check
🐶
Puppy Cute Worldyour pocket puppy 💕
🪙 126🐶Tap puppy to pet!
Puppy Cute WorldEdit with AI
Updating app✓ Rooms✓ Join codes✓ Public parks
Welcome to Puppy Park! 🐾Play solo or fetch with friends.
AB12CD
🌍 Public ParksPuppyFriend’s Park · 1/6 players
Type a message…
Interactive preview
Built for iteration
Powerful without feeling heavy.
Custapp combines local execution, controlled permissions, AI editing, and multiplayer building in one mobile workflow.
Local-first
Apps and workspaces stay close to the device and your chosen machines.
Sandboxed
Mini-app capabilities are separated and surfaced through controlled access.
AI editable
Keep changing an app with natural language instead of rebuilding from scratch.
Multiplayer ready
Turn a solo idea into shared rooms and connected experiences.
Download Custapp
Choose your platform.
Download the Mac app, bring your PSP along, or start on Android and Chrome. Everything you need to get set up is here.
Native Mac workspace
Custapp for macOS
Build and run apps on your Mac. Connect Custapp Web or use your Mac as the companion for your PSP.
- Apple Silicon · macOS 14 or later
- Version 0.1.3 · Node.js required
Homebrew Preview
Custapp for PSP
Your pocket companion for chats and projects. Your Mac handles AI; your PSP keeps you connected.
- PSP 1000 / 2000 / 3000 / Go / Street
- Custom firmware + Mac 0.1.2 required
Hardware validation is ongoing. PSP Street uses USB exchange.
Download PSP preview Choose your model & set up
Recommended
Google Play
The easiest way to install Custapp and receive updates through Google Play.
Scan with your Android phone
Independent repo
F-Droid
Add the official Custapp repository to your F-Droid client and install from there.
https://custapp.telponai.com/fdroid/repo
Scan to add the signed Custapp repositoryRepository fingerprint
FAEBE2E098C8E90C062C3D26391F6E2E46067698E730F303E9ABB90F5934A8E7
Chrome companion
Chrome Extension
Chat, build apps, and work with your browser in an independent Chrome workspace.
Install for Chrome ↗Mac and PSP downloads include installation guides and SHA-256 checksums. PSP is a homebrew preview.
FAQ
Before you install.
What is Custapp?
Custapp is an AI app builder for Android, macOS, and Chrome. Create, update, run, and share mini-app experiences in your own workspace.
Where can I install Custapp?
Download Custapp for Mac, install the Android app from Google Play or F-Droid, or add the Chrome Extension. The PSP homebrew preview connects to the Mac app over Wi-Fi or USB exchange.
What do I need for the PSP preview?
A PSP with homebrew-capable custom firmware and Custapp for Mac 0.1.2. Wi-Fi models can pair on a compatible local network; PSP Street uses manual USB exchange. Hardware validation is ongoing. See the model-by-model setup guide.
Can AI update an app after it is created?
Yes. You can keep chatting with AI to change behavior, UI, or features without starting from scratch.
Can Custapp build multiplayer apps?
Custapp can create multiplayer-ready experiences with rooms and connected app flows.
What will you build first?