What is Tech Dev Notes?

Tech Dev Notes catalogs how iOS and Android apps are built: store and in-app screens, SDKs detected in shipped builds, version history, and chart rankings. The same catalog is available to agents through the public API and the MCP server.

Which apps do you track?

We track leading apps including ChatGPT, Grok, Claude, Google Gemini, Microsoft Copilot, Perplexity, DeepSeek, Meta AI, Le Chat by Mistral AI, Character AI, and Poe. Both iOS and Android versions.

How often is the data updated?

App Store and Google Play rankings and versions are collected every 12 hours. In-app screens are added when a capture run stores them. Tech stacks come from analysed builds, not from every store listing.

Is this data free to use?

Rankings, version history, and screenshots on the site are free to read. Agents call /api/v1 and the MCP server at /api/mcp with a key that starts with tdn_. Email alerts cover new versions and large rank changes for tracked apps.

Track how the top AI apps move.

Chart ranks in 193 countries, new versions and tech stack changes, checked every 12 hours. One email each Monday.

Pick 3 apps to follow See this week's changes

Top AI apps on the US App Store

Checked every 12 hoursLive

ChatGPT1.2026.286 · 4d agoRank 4-1.2026.2864d ago
Claude1.261023.20 · 2d agoRank 8-1.261023.202d ago
Google Gemini1.2026.4171302 · 5d agoRank 13down41.2026.41713025d ago
Grok1.4.59 · 6h agoRank 38-1.4.596h ago
Grok Bot1.18.0 · 3d agoRank 70up261.18.03d ago
Microsoft Copilot2.115.2 · 18h agoRank 83-2.115.218h ago
Suno1.94.0 · 30h agoRank 93-1.94.030h ago
DeepSeek2.7.1 · 3d ago · best in BelarusBest rank, BelarusRank 4-2.7.13d ago

See all charts

This week

Rank moves and releases from 19 to 25 Oct 2026.

All changes

Claude entered the top 10 in Saudi Arabia at #3.
Google Gemini added MaterialM3CTextField, SpotlightCardCarousel in 1.2026.4171302.
ChatGPT shipped version 1.2026.286.

Use it from your AI agent

Ask Claude, ChatGPT or Cursor about any app's ranks, versions and stack. Create a free key on your account page, then paste this config.

API and MCP docs

mcp.json

{
  "mcpServers": {
    "techdevnotes": {
      "url": "https://techdevnotes.com/api/mcp",
      "headers": {
        "Authorization": "Bearer tdn_YOUR_KEY"
      }
    }
  }
}