If you are building a Flutter SEO tool, content planning app, or digital marketing dashboard — you need real keyword data, not guesswork. keywords_research_generator is a free, open-source Flutter plugin published under the SEOSiri pub.dev publisher that gives you 500–1,000 real keyword phrases per seed, complete with SEO metrics, search intent classification, semantic clusters, and Google Search Console integration — all at zero API cost.

✨ Features at a Glance

🆓 Zero-Cost API Stack

🚀 Getting Started

Step 1 — Add to pubspec.yaml

dependencies:
  keywords_research_generator: ^2.0.0

flutter pub get

Step 2 — Generate keywords from a seed

import 'package:keywords_research_generator/keywords_research_generator.dart';

final generator = KeywordGeneratorService();

final result = await generator.generate(
  seedKeyword: 'flutter seo plugin',
  filter: KeywordFilter(
    region: 'US',
    businessSegment: 'SaaS',
    maxSeoDifficulty: 60,
    minOpportunityScore: 40,
  ),
  maxKeywords: 100,
  onProgress: (percent, message) {
    print('$percent% — $message');
  },
);

print('Generated ${result.totalKeywords} keywords');
print('Clusters: ${result.clusterSummaries.length}');
print('Trend: ${result.trendDirection == 1 ? "Rising 📈" : "Stable"}');

Step 3 — Drop-in Flutter widgets

// Full keyword list with filters, sorting, export
KeywordListWidget(
  result: result,
  onKeywordTap: (keyword) => showDetailSheet(keyword),
)

// Semantic topic clusters view
KeywordClusterWidget(
  clusters: result.clusterSummaries,
  onKeywordTap: (keyword) => handleTap(keyword),
)

// Real-time pipeline progress
ProgressOverlay(progress: progress, message: statusMessage)

// Google Search Console OAuth + data
GscConnectWidget(property: 'https://yoursite.com')

🔎 SEO Best Practices When Using This Plugin

The plugin generates raw keyword intelligence. Here is how to turn that data into real rankings:

Short-Tail Keywords (1–2 words)

• Use as H1 heading and <title> tag — these carry the highest topical authority signal
• Target in pillar content pages (2,500+ words) that link to cluster posts
• Expect high difficulty (70+) — build domain authority before targeting
• Add to internal anchor text when linking from long-tail cluster posts

Long-Tail Keywords (5+ words)

• Target in dedicated FAQ sections, blog posts, and support pages
• Use exact-match in H2 subheadings for featured snippet eligibility
• Lower competition (20–40 difficulty) — fastest path to page 1 ranking
• Group related long-tails under the same cluster and interlink them

Transactional Intent Keywords

• Place on landing pages and product pages with clear CTAs
• Add Product and Offer schema markup to improve rich results
• Use in Google Ads with Exact Match type for maximum relevance

⚡ AEO — Answer Engine Optimisation

The plugin's isAeoFriendly flag and generateAeoVariants() method identify your best AEO opportunities. Use them like this:

• Write a 40–60 word direct answer paragraph immediately after the H2 that matches the query
• Follow with an ordered or unordered list — AI engines favour structured data
• Add FAQPage JSON-LD schema — increases visibility in People Also Ask (PAA) boxes
• Use the AEO variants from the plugin as H3 sub-questions in your content
• Keep answers under 300 words — AI summaries prefer concise, authoritative snippets
• Cite primary sources (Google, Wikipedia, academic) — AI engines trust well-referenced content

🎙️ Voice Search Optimisation

The plugin's VoiceSearchService generates conversational variants and question-form phrases. Here is how to deploy them:

📊 Striking Distance — Your Quickest Wins

The plugin's Google Search Console integration flags keywords ranking position 11–20 — one page away from your first-page traffic. These are your highest-ROI optimisation targets.

💰 How to Monetise the keywords_research_generator Plugin

Open-source does not mean zero income. Here are eight proven monetisation paths — ranked from easiest to highest revenue ceiling:

🎨 UI/UX Best Practices for Keyword Research Apps

Progressive Disclosure Pattern

• Show only: keyword phrase, intent badge, opportunity score, and volume on the list
• On tap: expand to full metrics (difficulty, CPC, CTR, trend direction) in a bottom sheet
• On detail view: show SEO hints, voice variants, AEO variants, and SEM recommendations

Colour-Code Everything

• Opportunity score 70+ → Green highlight → "Act now"
• Difficulty 40–70 → Amber warning → "Requires effort"
• Difficulty 70+ → Red → "Requires strong domain authority"
• Rising trend → Show TrendChip widget with animated indicator

Performance Matters

• Use ProgressOverlay with stage labels — users tolerate 60s waits if they see progress
• Cache first: check cache before hitting APIs — use KeywordCacheService
• Paginate list views — never render 1,000 cards at once; use 20-item pages
• Lazy-load cluster expansion — only build cluster widgets when the section is visible

🔗 Essential Resources

⚖️ Open Source · MIT Licence