# AppSigma

> AppSigma is an App Store analytics and ASO (App Store Optimization) platform. It tracks Apple iOS apps to surface keyword rankings, chart positions, competitor gaps, and review trends, and runs AI sentiment analysis over user reviews to extract bugs, feature requests, and satisfaction signals. Free to start; paid plans for teams.

Key facts:

- Product site: https://appsigma.io — server-rendered marketing pages and a markdown blog.
- App (sign-in required): tracked apps dashboard, keyword tracker, competitor analysis, review/sentiment analytics, search performance.
- Developer API: a separate, paid REST API for raw App Store data, documented at https://docs.appsigma.io (its own llms.txt: https://docs.appsigma.io/llms.txt).
- Pricing tiers: Free (no card), Starter, and Pro. All paid plans share the same premium feature set. See /pricing for current prices.

## Product

- [Home](https://appsigma.io/): What AppSigma does — review monitoring, AI sentiment analysis, keyword and chart tracking, competitor insights.
- [Pricing](https://appsigma.io/pricing): Free, Starter, and Pro plans; feature comparison and CTAs.
- [App Store Data API](https://appsigma.io/app-store-api): Overview of the developer REST API for apps, reviews, keywords, rankings, and competitors. Get a free API key.

## Free tools

- [Keyword Search Tool](https://appsigma.io/keywords-tool): Look up App Store keyword rankings across countries with traffic and difficulty scores. No sign-up needed (limited countries for guests).
- [Screenshot Generator](https://appsigma.io/screenshots-generator): Generate App Store screenshots. Daily generation limit for guests.

## Blog

- [Blog index](https://appsigma.io/blog): Articles on ASO, keyword tracking, and App Store analytics. Each post also serves raw markdown at `/blog/{slug}.md` for AI crawlers.
- [How App Store Keyword Tracking Works (and Why Rankings Move)](https://appsigma.io/blog/how-app-store-keyword-tracking-works): What App Store search position measures, why it moves daily, and how to pick keywords worth tracking. ([raw markdown](https://appsigma.io/blog/how-app-store-keyword-tracking-works.md))

## Developer API docs

- [API docs (rendered)](https://docs.appsigma.io/): Interactive Scalar reference for the App Store Data REST API. Base URL `https://api.appsigma.io`.
- [API llms.txt](https://docs.appsigma.io/llms.txt): Full LLM-oriented index of every API endpoint (applications, reviews, charts, developers, editorial items, events, search).
- [OpenAPI spec (YAML)](https://docs.appsigma.io/openapi.yaml): Machine-readable contract for code generation and validation.

## Legal

- [Privacy Policy](https://appsigma.io/privacy)
- [Terms of Service](https://appsigma.io/terms)
- [Sign in](https://appsigma.io/login): Magic-link authentication; required for the dashboard and to manage API keys.