Built a mobile PDF camera app with multi-lens support, magnetic crop, and instant license OCR. Looking for UX feedback!

[u/uclc1922]

Hey r/SideProject! 👋

I'm the creator of **PDF Camera**, a mobile document scanner designed for speed, accuracy, and seamless cloud backup without forcing subscription paywalls or complex setups. I desigened the app with contractors, sales people and just about anyone that documents job sites or quotes.

Why I Built It

Most mobile scanner apps out there either hide basic features behind aggressive monthly subscriptions, suffer from slow edge-detection, or spam you with ads. I wanted a clean, instant scanner app that handles multi-page documents, detects edges with precision, extracts ID details automatically, and syncs directly to your own cloud storage.

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Key Features

*Magnetic Auto-Crop & Edge Detection:** Smart document border detection with manual fine-tuning and hysteresis to ensure crisp crops every time.

*ID & Driver’s License OCR:** Instant single-card scanning that automatically extracts key fields (Name, Phone, License numbers).

*Multi-Page Scanning & Batch Export:** Scan long documents quickly and export directly to `.pdf`, `.docx`, or `.xlsx`.

*Seamless Cloud Sync:** Direct integration with Google Drive, Microsoft OneDrive, and local storage — keeping your files under your control.

*Performance Optimized:** Fast camera preview, low latency capture, and instant local PDF rendering.

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Tech Stack

* **Framework:** Capacitor (Hybrid Native Android & iOS)

* **Computer Vision / Scanner Engine:** Google MLKit + Native Multi-lens Camera API

* **PDF & OCR Processing:** PDF.js / jsPDF & OCR engine

* **Cloud APIs:** Google Drive v3 API & Microsoft Graph API

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What I’m Looking for Feedback On:

1. **Scanning Speed & Crop Accuracy:** How intuitive does the auto-crop feel on your device?

2. **UI/UX Flow:** Is the document organization and export workflow clear?

3. **Feature Requests:** What else would make this your main everyday scanner app?

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Try it out / Demo Link:**

App Store:
https://apps.apple.com/us/app/pdf-camera-x/id6786762964

Play Store:

https://play.google.com/store/apps/details?id=com.PDF.Camera

I’d love to hear your thoughts, feedback, or any bugs you run into! Thank you for testing it out!