Clean, deployable app starters

Opinionated SaaS templates built for developers – modern stack, clear README, and a deployable baseline you can extend.

Stack focus: Next.js 16 · React 19 · Tailwind 4 · Node 20.x

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Now available: DraftLetter and BriefGrid

More starters are in active development.

DraftLetter — Newsletter Draft Workflow Starter (Next.js 16)

On Sale

£999.99

Solo Licence

£145

• 1 developer
• use for your own internal projects
• rebrand/customise
• no redistribution/resale of the starter as a product

Agency Licence

£295

• up to 5 developers
• unlimited client projects
• rebrand/customise per client
• no redistribution/resale of the starter as a standalone product

Resale Licence

£495

• rebrand and sell as your own product
• include in a paid bundle
• transfer to a buyer as part of an asset sale
• list on marketplaces under your own branding

All tiers include full source code and documentation. Licence scope differs by redistribution/resale rights.

Added to cart

DraftLetter is a production-ready newsletter draft workflow for developers and agencies who need consistent, repeatable newsletter output without rebuilding generation logic and UI from scratch.

This is not a hosted SaaS and not a chat-based writing assistant. It is a deployable baseline you own, extend, and integrate into your own product or client stack.

What it does

DraftLetter turns structured inputs (topic, audience, tone, key points) into a complete newsletter draft:

• Subject line

• Preheader

• Introduction

• Sectioned body content

• Call-to-action

Outputs are available as:

• Formatted preview

• Clean HTML

• Plain text

The workflow is already wired. You are not starting from a blank Next.js project or a prompt experiment.

Why use this instead of “just calling the API”

Without a workflow:

• Every prompt is ad-hoc

• Structure and tone drift between people

• Output quality depends on who wrote the prompt

• You rebuild the same UI repeatedly

With DraftLetter:

• Inputs are structured and enforced

• Output format is predictable

• Generation logic is implemented

• The UI and export paths are done

You focus on branding, persistence, auth, and business logic — not the plumbing.

What’s included

• Complete Next.js 16 application (App Router)

• Newsletter draft generation flow

• Three export formats (formatted, HTML, plain text)

• Clean minimal UI designed for rebranding

• Example environment variable configuration

• Comprehensive Developer Guide (Quick Start + customisation)

• 70-second walkthrough video

• Example styled HTML newsletter included in the guide

• OG / social preview images

Tech stack

• Next.js 16 (App Router)

• React 19

• TypeScript

• Tailwind CSS 4

• ESLint 9

• Node 20 runtime target

Aligned with current Next.js and Vercel guidance.

What this does not include

• Authentication

• User management

• Billing

• Database persistence

• Analytics

This is intentional. Those choices vary by product and client.

Who it’s for

• Developers building newsletter tools or internal comms systems

• Agencies delivering newsletter workflows to clients

• Teams that need a working baseline quickly

Who should not buy this

• Teams looking for a hosted SaaS product

• People looking for a chat-based writing tool

Licence tiers

All tiers include the full source code and documentation. Choose Solo, Agency, or Resale depending on how you plan to use and redistribute the starter.

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About

TwelveVoltsCo builds small, focused tools for real-world use - practical, reliable, and built to work.

This store is where we publish our app starters and utilities for other developers to use and extend. Products are built and maintained by TwelveVoltsCo. For support or questions, email twelvevoltsco.dev@gmail.com.

FAQs

In this context, “production-ready” means each starter ships as a deployable baseline app that runs reliably in a real environment. You get a working core flow, a clear README, and deployment guidance. These are starters, not turnkey SaaS businesses – you still customise features, styling, auth, billing, and integrations to fit your own product or client project.
Developers and technical founders who want a solid starting point instead of building every project from a blank repo.
It is not intended as a consumer product; it’s a starter aimed at technical buyers.
Most starters use a modern web stack (for example: Next.js, React, TypeScript, Tailwind CSS, and a hosted database or API). Each product page lists the exact stack, versions, and any external services required.
If a product does not work as described, contact twelvevoltsco.dev@gmail.com within 30 days of purchase. We’ll help you resolve the issue; if it can’t be fixed, we’ll provide a refund.
Yes. At TwelveVoltsCo we launch starters when they are stable, documented, and deployable. New products will appear here as they are ready, not before.
Your purchase includes the current version of the starter as described on this page.
If we discover a defect that stops the shipped features from working as described (for example, the app no longer runs or a documented flow is broken), we will issue a corrected version and make it available to existing customers at no extra cost.
Broader enhancements, new features, or new editions (for example, versions with built-in auth or billing) may be released as separate products.

Clean, deployable app starters

Now available: DraftLetter and BriefGrid

About

FAQs

Q1. What does “production-ready” mean here?

Q2. Who are these products for?

Q3. What stack are you using?

Q4. Do you offer refunds?

Q5. Do you plan to add more starters?

Q6. What does my purchase include in terms of updates?

Built to fix, built to work.