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 WWDC Scholar 2021 | App Developer, UI Designer & 📽Photographer | Contact: | Website:

Simple and Easy. Just 3 Steps!

Recently, I imported a number of SVG images to Xcode for my app development. However, the SVG files were not displaying correctly. Then, I tried to convert one of them via an online SVG-to-PDF converter tool which made the thing works again. …

Easy to recycle your device in an environmental friendly way.

What is Apple Trade In program?

The trade-in program is provided by Apple and Brightstar, which allows people trade-in and recycle their old device.

  • Case A: If the old device is eligible for trade-in credit, Apple will send you an Apple Gift Card for next-time purchase.
  • Case B: If the old device’s is not eligible for…

Using auto script for sending local server ip…

A built-in Cloudflare/Akamai/Fastly VPN on Apple devices? Speed and connection test and more…

What is iCloud+?

iCloud with an all-new subscription and new features including iCloud Private Relay, Hide My Email, and expanded HomeKit Secure Video support. — Apple

A simple and easy workaround solution to help solve the badge counting issue.

During WWDC21, I discussed with the Apple engineer about the CloudKit and notification-related questions.

Problem: “ When we push remote notifications from CloudKit to the device, the badge counting is the same as the row number in the “Record Type”.
Although we can reset the badge number using
UIApplication.shared.applicationIconBadgeNumber = 0

Auto-sync for your every personal devices instantly

Are you looking for a simple and comfortable 2FA/MFA security solution for your account? Auth. is a free 2FA and OTP management tool for everyone. It works with all Apple personal devices — auto synchronize based on iCloud Keychain technology.

Supported Devices

Smart Sync

  • iPhone
  • iPad
  • Apple Watch

A simple tutorial of enabling and connecting Mac instance on AWS EC2.

Recently, AWS released the new EC2 instance with macOS 11.2.1 Big Sur. Thankfully I have a chance to test this mac machine on the cloud. Cool! Let’s take a look at how it works.



01. Visit EC2 console (

  • Limited region available: US East (N. Virginia), US East (Ohio), US…

An easy, affordable and high availability solution.

This tutorial takes around 15~30 minutes, for everyone (beginners-friendly).


  1. Create a AWS Account:


  1. Go to S3 Section:
  2. Create a new bucket, which used as storage.

You can build, and run your app on a simulated device easily.

Where to get Xcode?

For developer: > Applications
For Universal App Quick Start Program:

For public:


Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store