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Cover image for How I Built TrustFinder: A Deep Search AI App for Finding People, Reverse Image Search & Price Comparison on Android
Md. Al Mamun
Md. Al Mamun

Posted on Originally published at play.google.com

How I Built TrustFinder: A Deep Search AI App for Finding People, Reverse Image Search & Price Comparison on Android

If you've ever tried to find someone online, verify a photo, or
compare product prices across multiple websites, you know how
frustrating it can be to jump between apps and browsers.

That's exactly why I built TrustFinder: Deep Search AI - an
all-in-one AI-powered search assistant for Android.

What is TrustFinder?
TrustFinder is an Android app that combines three powerful search
tools in one place:

🔍 Find People by Name - AI deep search across publicly
available sources.
🖼️ Reverse Image Search - Find where any photo appears online
🛒 Price Comparison - Compare prices across major retailers
instantly

All results come strictly from publicly available sources. No
private databases. No confidential records.

The Problem We're Solving

Most people search have to:

  1. Open Google to search for a person
  2. Switch to a reverse image search tool
  3. Open multiple shopping tabs to compare prices

Three different tools. Three different apps. Huge waste of time.

TrustFinder solves this by combining all three into a single
clean interface - powered by AI.

Core Features

🔍 Find People by Name (Main Feature)

Enter any name and TrustFinder runs an AI deep search across
multiple publicly available sources - surfacing:

  • Public social media profiles
  • Online mentions and posts
  • Username matches across platforms

Perfect for researchers, journalists, recruiters, and everyday
users who want to reconnect with someone or verify a new contact.

// Example: How the deep search works
fun searchByName(query: String): SearchResults {
    return aiSearchEngine.deepSearch(
        query = query,
        sources = PublicSources.ALL,
        filters = SearchFilters.PUBLIC_ONLY
    )
}
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🖼️ Reverse Image Search

Upload a photo from your gallery, capture one with your camera,
or paste an image URL.

TrustFinder instantly finds:

  • Where the photo appears online
  • The original source
  • Visually similar content

🛒 Smart Price Comparison

Search any product and compare prices across major retailers in
seconds - without opening multiple browser tabs.

Tech Stack

Building TrustFinder involved working with:

  • Android (Kotlin) - Native Android development
  • AI Search Engine - Multi-source public data aggregation
  • Reverse Image API - Real-time image source detection
  • Price Comparison Engine - Multi-retailer price scraping

Privacy First

One thing I was very intentional about:

TrustFinder only shows publicly available information. It must
not be used for harassment, stalking, or unauthorized monitoring
of any individual.

This isn't just a disclaimer - it's built into how the app works.
Every search is filtered to public sources only. No private databases are accessed at any point.

Why I Focused on These Three Features

After researching the Android app market, I noticed something
interesting:

  • Dozens of apps do people search
  • Dozens more do reverse image search
  • And others handle price comparison

But nobody combined all three into one clean AI-powered tool.

That gap became TrustFinder's unique selling point.

What's Next

We're currently working on:

  • Username search across more platforms
  • Expanded price comparison retailers
  • Faster AI search results

Try TrustFinder

If you're building something that needs reliable public data
search, or just want a smarter way to find people, verify images,
and compare prices - give TrustFinder a try.

📲 Download TrustFinder: Deep Search AI on Google Play:

Have questions about how I built the search engine or integrated
the AI features? Drop a comment below - happy to discuss the
technical details!

android #ai #appdevelopment #mobiledev #productivity #deeplearning #trustfinder

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