---
title: "Kerem Erkan — iOS and macOS Developer"
canonical: https://keremerkan.dev/
---

# Kerem Erkan

Privacy-focused apps and tools for iOS & macOS. Independent developer since 2011.

## Apps

- [Qrafter](https://qrafter.app/) — QR Code Scanner & Generator (iOS). The most powerful QR code companion since 2011. Scan, create, and manage QR codes with custom designs and enterprise-grade encryption. It has a free online generator too.
- [Junkman](https://junkman.app/) — Smart SMS Blocker (iOS). Intelligent SMS filtering powered by on-device machine learning. Block spam before it reaches your inbox, without sending your data anywhere.
- [Begone](https://begone.app/) — Spam Call Blocker (iOS). A powerful call blocker with intelligent wildcard filtering. Protect yourself from robocalls and spam with community-powered block lists.
- [PSWD](https://pswdapp.com/) — Password Generator (iOS · macOS). Generate strong, unique passwords instantly. Simple, fast, and completely offline. Your passwords never leave your device.

## Tools

- [ASCelerate](https://ascelerate.dev/) — App Store Connect CLI (Open source). A Swift CLI for the entire App Store release pipeline. Create versions, upload builds, manage screenshots, update localizations, and submit for review, all from the terminal.

## Homebridge

- [homebridge-shelly-matter](https://keremerkan.dev/posts/homebridge-shelly-matter/) — Shelly energy metering via Matter (Open source). Brings Shelly relays and plugs into Apple Home over Matter — live power, voltage, current, and cumulative energy, surfaced in the iOS 27 Energy view. Source on GitHub.
- [homebridge-sony-adcp](https://keremerkan.dev/posts/homebridge-sony-adcp/) — Sony projectors in HomeKit (Open source). Exposes Sony VPL-XW and VW projectors to HomeKit as a native Television accessory — power, HDMI inputs, and picture modes over ADCP. Source on GitHub.

## Featured Posts

- [Using udp2raw to bypass censoring on Wireguard protocol](https://keremerkan.dev/posts/udp2raw-bypass-censoring-wireguard-protocol/) (2026-07-17) — UPDATE: I now recommend using AmneziaWG. I have moved to it instead of using udp2raw and it works wonderfully. Many states block access to web sites, commercial VPNs, VPN protocols, and in some cases…
- [ASCelerate: A Swift CLI for App Store Connect](https://keremerkan.dev/posts/ascelerate-swift-cli-app-store-connect/) (2026-02-25) — If you've ever shipped an iOS app, you know the ritual. Open Xcode, archive, wait, open App Store Connect in the browser, click through a dozen screens to set up localizations, upload screenshots one…
- [WireGuard MTU fixes](https://keremerkan.dev/posts/wireguard-mtu-fixes/) (2019-11-22) — UPDATE: I researched a little more on this. ipv6 connections require 1280 as the minimum MTU and most router configurations expect to see some standardized MTU. So instead of 1412 as I wrote below,…

## Recent Posts

- [homebridge-shelly-matter: Shelly energy metering in Apple Home, via Matter](https://keremerkan.dev/posts/homebridge-shelly-matter/) (2026-07-26) — Bring Shelly devices into Apple Home over Matter with live power and energy metering in the iOS 27 Energy view — something HomeKit's own protocol has never supported.
- [Leaving WordPress after twenty years](https://keremerkan.dev/posts/leaving-wordpress-after-twenty-years/) (2026-07-18) — After running WordPress since 2006, a Cloudflare incident during a theme redesign was the nudge to admit my blog no longer needed to be dynamic. So I rebuilt it as a static Astro site.
- [Türkiye'de Wireguard engelleme çözümü](https://keremerkan.dev/posts/wireguard-engelleme-cozumu/) (2026-07-17) — GÜNCELLEME: Artık bu çözüm yerine AmneziaWG kullanmanızı öneririm. udp2raw yerine onu kullanıyorum ve sorunsuz çalışıyor. Yıllardır çeşitli servis sağlayıcılarda Wireguard protokolüne bant sınırlaması veya topyekün yasak bulunuyor. Büyük ihtimal ticari VPN servislerinin Wireguard protokolünü…
- [homebridge-sony-adcp: A Homebridge plugin for Sony ADCP projectors](https://keremerkan.dev/posts/homebridge-sony-adcp/) (2026-06-14) — A Homebridge plugin that exposes Sony VPL-XW and VW projectors to Apple HomeKit as a native Television accessory — power, HDMI inputs, and picture modes over ADCP.
- [Moving to keremerkan.dev](https://keremerkan.dev/posts/moving-to-keremerkan-dev/) (2026-03-03) — I moved this site from keremerkan.net to keremerkan.dev. All old links redirect automatically: bookmarks, search results, and shared URLs will keep working. Why the Change I've had keremerkan.net since 2006 and it served me…

All posts: https://keremerkan.dev/blog.md · RSS: https://keremerkan.dev/rss.xml

## Elsewhere

- [LinkedIn](https://linkedin.com/in/keremerkan)
- [X](https://x.com/kerem_erkan)
- [Bluesky](https://bsky.app/profile/keremerkan.dev)