GapLens
A tool that analyzes app store and SaaS review pages to identify the gap between what users love (5-star) and hate (1-2-star), surfacing validated micro-SaaS opportunities.
The problem
Builders waste months building ideas without market validation; app store reviews reveal unmet needs but are too manual to analyze systematically[2]
Proposed solution
Automated scraper that ingests review data, clusters positive/negative sentiment by feature, and outputs a 'gap report' highlighting high-demand, low-competition features
Target audience
Indie hackers and micro-SaaS builders looking for validated ideas
Key features
- App store review scraper for top 100 apps in niche
- Sentiment clustering by feature (love/hate)
- Gap score calculator (demand vs. competition)
- Exportable idea brief with target audience and MVP features
- Daily email digest of new gaps
Monetization strategy
$29/month for unlimited scans; $99/month for API access and custom niche reports
Skills to build it
- Python (scraper + NLP)
- REST API integration (App Store, Google Play)
- Sentiment analysis (transformers or spaCy)
- React frontend
- PostgreSQL for data storage
An idea is a starting point for research. Validate customer demand before building.