Fixed-scope offer
Web3 app MVP in 8 to 12 weeks
- Price
- From £18,000
- Time
- 8 to 12 weeks
- Payment
- 50% deposit to book, balance on launch; monthly plans billed in advance.
A new web or mobile product with smart contracts, wallet sign-in and a normal, usable interface, tested and live on a testnet in eight to twelve weeks and ready for audit and mainnet.
We reply within one working day.
What happens after you get in touch
We reply within one working day.
Step 1
We reply within one working day
We read what you sent and come back with questions, a rough view of cost, or a time to talk.
Step 2
A 20-minute call
We talk through what you need and tell you honestly whether we're the right team. No charge and no obligation.
Step 3
A written, fixed-price proposal
Scope, price and timeline in writing. Nothing starts until you've signed it off.
Who it's for
Founders building a product where ownership, settlement or verification genuinely belongs on-chain, who want a first version real users can try before committing to mainnet.
What you get: A working product on a testnet with its contracts, front end and dashboard, plus the audit brief and mainnet plan.
What's included
- A two-week scoping and design sprint: what goes on-chain and what doesn't, the contract design, the user journey and what waits for version two.
- Solidity contracts on OpenZeppelin's audited libraries, with a full test suite and static analysis.
- A Next.js web app, or a native iPhone or Android app, with wallet connection, Sign-In with Ethereum and an interface that reads like a normal product.
- An indexer and dashboard for the on-chain data your team or community needs to see.
- A testnet deployment you can share, with a demo every week during the build.
- The feature design checked against Apple's and Google's rules for crypto apps, if there's a mobile app.
- An audit brief, a mainnet deployment plan with cost estimates, and the code, infrastructure and documentation in your name.
Not included
- Mainnet deployment costs, gas, RPC and indexer hosting, and the independent audit fee. All paid by you.
- A security audit or regulatory advice. We recommend both from specialists before launch.
- Token launches, listings or anything that needs an approved exchange or regulated status.
- Non-EVM chains such as Solana.
How it runs
- Weeks 1 to 2Scope and design: what belongs on-chain, contract design, screens and the mainnet cost list, signed off by you.
- Weeks 3 to 10Contracts and tests first, then the front end and indexer, with a testnet demo each week.
- Final 1 to 2 weeksYour review on the testnet, fixes, documentation, the audit brief and the mainnet plan. Mainnet follows the audit.
Why trust us with it
We have no shipped blockchain client work to show, and we'd rather tell you that than invent a case study. What you can check is how we build products: our own apps on the App Store, this site, and the process on this page. You'll see the product working on a testnet every week, so you judge it as it's built.
After launch
Keep it working after launch
Websites and apps need looking after once they're live. Ongoing development is the plan most people choose after this, at from £1,500 a month.
Already have an app or site that needs looking after?2 reserved build days a month, more if you need themFits after this
Ongoing development
From £1,500 a month
From £1,500 a month for 2 reserved build days to keep improving your app or web product, with a backlog we prioritise together and a release each month.
What's coveredin Ongoing developmentUp to 1 hour of small edits a month
Website care
£95 a month
We keep your website online, up to date and secure, and make the small changes you need each month.
What's coveredin Website careUp to 3 hours of changes a month
Website care Plus
£195 a month
Everything in Website care, with three hours of changes a month for sites that need new pages, offers or content most months.
What's coveredin Website care PlusUp to 4 hours of changes a month
App care
£450 a month
We keep your app working on each new iOS or Android, passing App Review or Play policy and looking current in the store, with time each month for changes.
What's coveredin App care
Month to month, billed in advance. Cancel with 30 days' notice. Pay yearly for two months free. Prices exclude VAT.
Questions we get asked
A product with one or two contracts, wallet sign-in, one core user journey done well, and a simple dashboard, live on a testnet. Marketplaces, several token types, complex governance or a mobile app alongside the web app move it up the range, usually to £30,000 to £80,000. We agree the exact scope in the first two weeks, so the price is fixed for that scope.
Because nothing that holds value should go to mainnet without an independent audit, and the audit should happen on the finished contracts. The MVP gives you a working product people can try, the audit brief and the mainnet plan; the deployment itself is a short step once the audit is done.
Three things, all paid by you: deployment gas, which depends on the chain and the day; RPC and indexer hosting each month; and the independent audit, which auditors price by the size and complexity of the contracts. We give you estimates for each in the mainnet plan.
Yes, with Apple's rules in mind. App Store Review Guideline 3.1.5 allows wallets only from developers enrolled as an organisation, bans on-device mining, limits exchange features to approved and licensed exchanges, and doesn't allow NFT ownership to unlock features. We design the mobile version around those rules from the start.
Promoting cryptoassets to UK consumers has been regulated by the FCA's financial promotions regime since 8 October 2023. We build the software and you're responsible for the regulatory position of anything you promote or sell through it; we don't advise on that and recommend a specialist solicitor before launch.
A 50% deposit to book the start date and the balance on launch of the testnet release. Prices exclude VAT.
Read before you start
- After launch
- Plan your budget
Other ways to start
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- Android version of your iPhone appFrom £8,000, 6 to 8 weeks
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- Smart contract and Web3 integrationFrom £6,000, 3 to 5 weeks
- App Store launch package£1,500, 5 working days
- On-device AI featureFrom £4,000, 3 to 6 weeks
- iPhone Duo readiness reviewFrom £2,500, 2 weeks
- App broken, rejected or abandoned?One place to start
- Something bigger or differentAll services
Start with a 20-minute call with our team.
Tell us where you are and what you need. We'll tell you honestly whether this offer fits, or what would. We reply within one working day.
We reply within one working day. Or call 020 3540 5048