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Dokum

A privacy-first document utility for iPhone, for anyone who’s felt uneasy sending a photo of their ID to a rental shop, a bank, or a stranger online.

Dokum’s four App Store screenshots: the document library, the biometric vault, smart watermarking, and permanent redaction on a sample ID card

The short version

Problem
Indonesians are routinely asked to send photos of their ID to rental shops, banks, and strangers online, with no easy way to control how that image gets reused.
What I built
A privacy-first iOS utility that watermarks, redacts, and cleans ID photos entirely on the phone, with nothing sent to the cloud.
What happened
Shipped to the App Store as a solo project and reached 33 downloads between April and August 2026. It came off the App Store when I didn’t renew my Apple Developer Program membership.

The problem

Sharing a photo of your ID is part of everyday life in Indonesia: renting a scooter, opening an account, verifying yourself to a seller online. Once that photo leaves your phone, you have no say in where it ends up or what it’s used for.

I saw a gap for a simple tool that lets people share what’s needed, and nothing more: watermark, redact, and share a KTP, SIM, or passport safely.

Decisions

Everything on-device

instead of cloud processing

A tool for protecting ID documents can’t ask people to upload those documents somewhere first. Every feature runs on the phone, with zero cloud dependency.

Permanent redaction

instead of an editable redaction layer

Redaction physically overwrites the pixels with black blocks. It isn’t a layer that can be peeled back, so the hidden details can’t be recovered from the shared file.

What I built

As the sole product owner, I covered problem definition, feature scoping, and launch without a team.

  • Document library to scan an ID or import one from Photos, then keep it organized
  • Biometric vault that keeps documents behind Face ID or a passcode
  • Smart watermarking with tiled or centered text overlays and custom opacity and rotation
  • Permanent redaction, a finger-paint tool for covering the details the recipient doesn’t need
  • EXIF metadata scrubbing to strip location and device data before sharing

Outcome

  • Shipped to the App Store as a solo project
  • 33 downloads between April and August 2026
  • No longer on the App Store: I didn’t renew my Apple Developer Program membership, so the listing came down
The launch announcement.