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

ChatGPT1.2026.293 · 2d agoRank 4up11.2026.2932d ago
Claude1.261026.20 · 41h agoRank 6up11.261026.2041h ago
Google Gemini1.2026.4262206 · 5h agoRank 7up11.2026.42622065h ago
Grok1.4.59 · 3d agoRank 36down61.4.593d ago
Microsoft Copilot2.115.2 · 3d agoRank 44-2.115.23d ago
Grok Bot1.19.0 · 41h agoRank 61up231.19.041h ago
Suno1.95.0 · 29h agoRank 97-1.95.029h ago
Meta AI296.1.0 · 2d agoRank 99-296.1.02d ago

See all charts

What the top AI apps are built with

Languages, UI frameworks and third-party SDKs detected in each app's shipped iOS build. 305 apps analysed so far.

All tech stacks Build an app like these

ChatGPT tech stackSwift with SwiftUI and UIKit28 SDKs
Claude tech stackSwift with SwiftUI and UIKit43 SDKs
Google Gemini tech stackSwift with SwiftUI and UIKit10 SDKs
Grok tech stackSwift with SwiftUI and UIKit47 SDKs
Microsoft Copilot tech stackReact Native with SwiftUI and UIKit10 SDKs

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.

More than a leaderboard

Every number comes from the stores and from the builds the apps actually ship.

Ranks in 193 countries175 App Store and 176 Google Play markets, checked every 12 hours.
Compare any two appsRanks, ratings, release pace and tech stacks, side by side.
Weekly changesEvery rank move, new version and tech stack change. Also as an RSS feed.
Follow appsOne email each Monday for the apps you pick.

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"
      }
    }
  }
}