The Missing Dev Tool for Wallet-Connected Apps

--

If you’ve ever built a dApp, you know the demo problem.

You’ve spent weeks building something solid. The code is clean, the UX is smooth, the product actually works. Then comes the moment where you need to show it to someone — an investor, a client, a potential user — and suddenly you’re fumbling through test wallets, faking transactions on a testnet that keeps breaking, or worse, opening your real wallet on screen in front of a room full of people.

It’s an embarrassing gap in the web3 developer toolkit. And it’s one that nobody has really solved until now.

The Problem With Demoing Wallet-Connected Products

Building on Solana, Ethereum, or any other chain comes with a specific set of demo challenges that web2 developers never have to think about.

Testnets are unreliable. Faucets dry up, RPC endpoints go down, transactions fail for no clear reason. Building a demo flow around a testnet is building on sand.

Real wallets expose too much. Opening Phantom or Trust Wallet during a demo means your actual holdings, addresses and transaction history are visible to everyone in the room. That’s not a reasonable ask for any developer.

Mocking wallet state in code is painful. You can hardcode fake balances into your frontend, but then your demo only works in that specific build. The moment someone asks to see a different portfolio state, you’re back to editing code and redeploying.

Screenshots don’t cut it for interactive demos. Static images fall apart the moment someone asks “can you click on that token” or “what does the transaction screen look like.”

This is the environment that Larpz Wallet was built for.

A Sandbox Wallet That Behaves Like the Real Thing

LarpzWallet is a pixel-perfect simulator of the three wallets your users are most likely already using: Phantom, Trust Wallet, and Ledger.

Not a rough mockup. Not a Figma prototype. A fully interactive UI that looks and behaves identically to the real wallet — with zero blockchain connection behind it.

As a developer, what that means in practice:

You control the state completely. Add any tokens, set any balances, configure any portfolio structure you need for a given demo. If an investor wants to see what the experience looks like for a whale wallet vs a new user wallet, you switch it in seconds — no code changes, no redeployment.

It runs as a PWA on iOS and Android. Install it on your phone from larpzwallet.app and it sits on your home screen like a native app. Pull it out mid-meeting, hand your phone across the table, let someone tap through the UI themselves. That level of interactivity is impossible with screenshots or static prototypes.

It supports custom tokens. Building on a lesser-known chain or launching your own token? You can import custom tokens into the simulator so your demo reflects your actual product environment, not a generic portfolio.

Language and currency settings work. If you’re demoing to an international audience or building a localised product, you can match the wallet display to your user’s expected experience.

Where It Fits in Your Workflow

LarpzWallet isn’t a replacement for proper development tooling — you still need your testnet environment, your local validator, your unit tests. But it fills a specific gap that those tools don’t cover: the presentation layer.

Think of it the way you think about design tools. You don’t ship Figma to users, but you use it to communicate ideas, align stakeholders, and move faster before anything is built. LarpzWallet plays the same role for the wallet interface — it’s the tool you reach for when you need to show something, not build something.

Investor demos. Show the full user flow of your wallet-connected product without a live blockchain dependency or real funds on screen.

User research sessions. Hand a participant a realistic wallet environment and watch how they interact with your product concept before you’ve written a line of integration code.

Onboarding documentation. Record walkthroughs using a controlled wallet state so your screenshots and videos don’t go stale every time prices move.

Client presentations. Show non-technical stakeholders exactly what the end user experience looks like, in a format they can tap through themselves.

Why the Pixel-Perfect Detail Matters for Developers

When you’re demoing to someone who actually uses Phantom or Trust Wallet every day, a near-miss on the UI is worse than no simulation at all. It breaks trust in your product before you’ve even started the conversation.

The obsession with accuracy in LarpzWallet — the spacing, the typography, the icon rendering, the interaction patterns — exists specifically because the audience for these demos is often crypto-native. They know what Phantom looks like. They’ll notice if something is off.

Getting that layer right means the conversation stays on your product, not on “wait, is that actually Phantom?”

Getting Started

LarpzWallet is available on a weekly, monthly or lifetime subscription at larpzwallet.app.

Once you’re in, install it as a PWA on your phone — iOS and Android both supported — and you have a fully interactive Phantom, Trust Wallet or Ledger simulator in your pocket whenever you need it.

If you’re building anything wallet-connected and you demo it to other people, this fills a gap in your toolkit you probably didn’t realise was there until the first time you needed it.