This is a too poor developer to pay $99 per year for distribution of an open-source and free browser extension in Apple App Store. So please install it manually, GG Safari.
git clone https://github.com/sheepzh/timer.git
cd timer
Some tools are required to compile this project to an executable software for Safari.
There are several steps.
- Compile the source code programmed with TypeScript to js bundles.
# Install dependencies
npm install
# Compile
npm run build:safari
Then there will be one folder called Timer.
Also, you can download the archived file from the release page, and unzip it to gain this folder.
- Convert js bundles to Xcode project
[YOUR_PATH]/Xcode.app/Contents/Developer/usr/bin/safari-web-extension-converter ./Timer
- Run Xcode project and one extension app will installed on your macOS
- Enable this extension
- Finally, open your Safari