System Requirements Document

Introduction

This document outlines the system requirements for the "Spintaxify" SEO Spintax Generator SaaS application. The application is designed to provide users with a robust tool for generating human-like spintax variations with a focus on speed and usability. The application will feature a modern 3D dark-mode UI with glassmorphism, vibrant gradients, and smooth shadows.

System Overview

The "Spintaxify" application will be a web-based SaaS platform that allows users to generate spintax variations for SEO purposes. It will include features such as authentication, pricing tiers, a spintax tool engine, and integration with payment systems. The application will enforce strict email and domain validation and provide a seamless user experience with instant execution speed.

Functional Requirements

Authentication, Access Control & Email Verification

• As a user, I want to sign up using my email and password.
• As a user, I want sign-ups to be restricted to @gmail.com email addresses only, with instant blocking of non-gmail domains.
• As a user, I want to receive a 6-digit OTP code for email verification before accessing the dashboard/tool.
• As a user, I want to enter the OTP code to activate my account and access the Spintax Studio tool.

Pricing Tiers & Limits

• As a user on the Free Plan, I want 10 article credits with a maximum of 500 words per article.
• As a user on the Pro Plan, I want 300 article credits per day, with articles ranging from 700 to 1,000 words and up to 5 unique variations per run.
• As a user on the Big Plan, I want 500 article credits per day, with articles ranging from 1,000 to 1,500 words and up to 5 unique variations per run.
• As a user on the Agency Plan, I want 1,000 article credits per day, with a maximum of 2,500 words per article, up to 5 unique variations per run, and access to bulk multi-variation engine and advanced bulk export.

Core Spintax Tool Engine & Features

• As a user, I want to input a spintax template with fast iterative parsing and brace-balance validation.
• As a user, I want to manage keyword and URL pairs, choose target paragraphs, and select anchor placement strategies.
• As a user, I want to select the number of unique variations (1 to 5) to generate simultaneously.
• As a user, I want to toggle a spam phrase filter to remove repetitive marketing terms.
• As a user, I want to view multi-format output tabs including RENDERED TEXT, HTML CODE, BBCODE, and PLAIN TEXT, with a "Copy All Outputs" button.

Database & Payment Integration

• As a system, I want to use Supabase for user management and credit tracking.
• As a system, I want to integrate Lemon Squeezy payment buttons and webhooks for plan upgrades and credit refills.

Email & Domain Validation

• As a system, I want to block fake, random, or temporary disposable email addresses.
• As a system, I want to enforce valid @gmail.com or verified corporate domain rules with backend verification.

Email Verification OTP Flow

• As a user, I want to receive a 6-digit OTP code for email verification before accessing the dashboard/tool.
• As a user, I want to enter the OTP code to activate my account and access the Spintax Studio tool.

Branding and Title Update

• As a system, I want to update all branding and titles to "Spintaxify" across the application.

Spintax Generation Optimization

• As a user, I want instant execution speed for spintax generation, with no artificial delays.
• As a user, I want the generated variations to read naturally like human-written content.

User Personas

• SEO Specialist: Uses the tool to generate spintax variations for SEO campaigns.
• Content Marketer: Utilizes the tool to create diverse content variations for marketing purposes.
• Agency Manager: Manages multiple client accounts and requires bulk processing capabilities.

Core User Flows

1. User Registration and Login

   • User signs up with a @gmail.com email.
   • User receives OTP and enters it to verify email.
   • User gains access to the full application features.

2. Spintax Generation

   • User inputs spintax template and selects options.
   • User generates variations and copies outputs.

3. Plan Upgrade and Credit Refill

   • User selects a plan and completes payment.
   • System updates user tier and refills credits.

4. Email Verification

   • User receives OTP and enters it to verify email.
   • User gains access to the full application features.

Visuals Colors and Theme

• Dark-mode UI with glassmorphism, vibrant gradients, and smooth shadows.

Signature Design Concept

• Modern 3D design with glowing card depth and smooth shadows.

Interaction Model & Motion Direction

• Smooth transitions and hover effects for interactive elements.

Non-Functional Requirements

• The system must handle up to 1,000 concurrent users.
• The application must load within 2 seconds on average.

Tech Stack

• Frontend: HTML, CSS, JavaScript
• Backend: Supabase
• Payment Integration: Lemon Squeezy

Assumptions and Constraints

• The application will only support @gmail.com email addresses for sign-up.
• The system will not support email verification for non-gmail domains.

Glossary

• Spintax: A method of generating multiple variations of text for SEO purposes.
• SEO: Search Engine Optimization, the practice of increasing the quantity and quality of traffic to a website through organic search engine results.