App Intel

Second Brain Joiner

LiveH.I. MET Architect2 apps · 28 installsProductivityFreeIn-app purchases: $2.99 per itemcom.himetarchitect.secondbrainjoiner

Optimize local notes for AI. Features token calculation, filtering & chunking.

Alert me★ WatchOpen in Play ↗
Total installs
25
exact · Play shows 10+
Installs / day
—
measured after our second crawl (about a day)
Rating
—★
— ratings · — reviews
Released
31 Mar 2026
6mo ago
Last update
6 Sept 2026
v1.3 · 1mo ago
Countries
—
not checked yet

Install history

exact counter from Google Play
24.430.837.243.65011 Oct12 Oct12 Oct
24.430.837.243.65011 Oct12 Oct12 Oct

Installs per day · last 90 days

Not enough history yet — check back tomorrow

Change timeline

No changes recorded yet. We compare every crawl with the previous one and list title, icon, screenshots, description, version, price and availability changes here.

Country availability

Availability has not been checked for this app yet. “Check all countries” looks the app up in about 140 Google Play storefronts and shows where it is live, listed but not installable, or missing — plus any country-specific (custom) store listings.

Top countries

Country data will be available soon.

We estimate where downloads come from using the app’s position in Google Play’s top charts in about 140 countries. This app is not in any chart we have collected yet; the estimate appears as soon as it is.

Top chart positions

Not in any tracked top chart.

App manifest

Read this app's manifest from Google Play: permissions, declared SDKs, components and AdMob app ID. Saved analysis appears here automatically.

Manifest analysis reads only the required APK ranges. Base APK downloads may need separate device splits to install.

Data safety

declared by the developer on Google Play
  • No data shared with third parties
  • No data collected

This is the developer's own declaration, summarised from the Play listing. The permissions below show what the app is technically able to access.

Permissions

3 in 1 group
0 Sensitive0 Notable3 Routine
OtherRoutine3

Access to miscellaneous device features that don't fit other categories

  • Check whether you are online and whether you use Wi-Fi or mobile dataview network connections · ACCESS_NETWORK_STATE
  • Connect to the internet to load content and send datafull network access · INTERNET
  • Check with Google Play that you got this app legitimatelyGoogle Play license check · com.android.vending.CHECK_LICENSE

Sensitive = can reach personal data, location, camera/mic or act on your behalf. Notable = changes how your device behaves. Routine = normal for almost every app. Source: Google Play's permission list for all versions of this app.

Store listing

Full description
Second Brain Joiner is a professional AI-context optimization tool for users who want to maximize their personal knowledge base with modern LLMs. Managing hundreds of Markdown notes for AI input is challenging. This app goes beyond simple merging, providing specialized data shaping for AI models. [Advanced AI Optimization Features] Accurate Token Estimation: Real-time calculation using industry-standard algorithms to predict context size with high precision. Advanced Filtering: Filter by specific tags or update dates. Remove noise and extract only the essential context to improve AI accuracy and save costs. Intelligent Auto-Chunking: Automatically split massive datasets into parts based on your token limits (e.g., 32k, 64k, 128k). It preserves context integrity by considering headers and paragraphs. [Core Features] Fully Local & Secure: All processing is done on-device. No cloud uploads, ensuring total privacy. AI-Optimized Output: Automatically generates a Tree Map of your structure so the AI understands your knowledge hierarchy. Smart Separators: Injects specialized tags to keep individual notes distinct for the AI. Transform your fragmented notes into the ultimate context that AI can understand perfectly.

What's new

All features are now available for free, permanently. You will no longer see any upgrade prompts. Thank you for using Second Brain Joiner.

Growing in Productivity

Category →