This is a Scriptable Widget Script for iOS. A World Air Quality Index Icon for your Homescreen.

Deutsch - Luftqualitäts Widget

// Das Skript habe ich auf Deutsch lokalisiert und es stammt aus der Quelle -> https://gist.github.com/SuperC1r0/a8aef6ec73108d03862aa96f278a72d7
//
// 
//
// ***Air Quality Widget***
//
// Copyright (C) 2020 by SuperC1r0
//
// Permission to use, copy, modify, and/or distribute this software is hereby granted. 
// However you have to respect the Terms of Service of the Air Quality Open Data Platform: https://aqicn.org/api/tos/
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
// IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
// OF THIS SOFTWARE.
//
// Variables used by Scriptable.
// These must be at the very top of the file. Do not edit.
// icon-color: deep-blue; icon-glyph: magic;
//** Script for scriptable to get the current Air Polution of your city 
 //Thank you World Air Quality Index Project for gathering all the data!
function createWidget(keyword,aqi,date){

    let widget = new ListWidget()

    let title = widget.addText([keyword] + "'s Luftqualität")
    title.font = Font.boldSystemFont(16)
    title.textColor = Color.white()
    title.centerAlignText()
    title.minimumScaleFactor = 0.4 
    title.lineLimit = 2  

    widget.addSpacer()

    let aqiTitle = widget.addText("AQI-Index")
    aqiTitle.font = Font.regularSystemFont(10)
    aqiTitle.textColor = Color.black()
    aqiTitle.centerAlignText()
    aqiTitle.minimumScaleFactor = 0.8

    //Air Quality Levels
    let aqiText = widget.addText(aqi)
    aqiText.font = Font.boldSystemFont(30)
    aqiText.centerAlignText()
    aqiText.minimumScaleFactor = 1
    if (aqi >= 300) {
        aqiText.textColor = Color.white()
        widget.backgroundColor = new Color("#7e0023")
        let aqiText1 = widget.addText("GEFÄHRLICH:👎🛑😷")
        aqiText1.font = Font.boldSystemFont(10)
        aqiText1.textColor = Color.white()
        aqiText1.centerAlignText()
        aqiText1.minimumScaleFactor = 1
    } else if (aqi >= 201) {
        aqiText.textColor = Color.white()
        widget.backgroundColor = new Color("#660099")
        let aqiText1 = widget.addText("SEHR UNGESUND:✋🛑")
        aqiText1.font = Font.boldSystemFont(9)
        aqiText1.textColor = Color.white()
        aqiText1.centerAlignText()
        aqiText1.minimumScaleFactor = 0.7
    } else if (aqi >= 151) {
        aqiText.textColor = Color.white()
        widget.backgroundColor = new Color("#cc0033")
        let aqiText1 = widget.addText("UNGESUND:👎")
        aqiText1.font = Font.boldSystemFont(10)
        aqiText1.textColor = Color.white()
        aqiText1.centerAlignText()
        
        aqiText1.minimumScaleFactor = 0.8
    } else if (aqi >= 101) {
        aqiText.textColor = Color.white()
        widget.backgroundColor = new Color("#ff9933")
        let aqiText1 = widget.addText("BEDENKLICH:✋")
        aqiText1.font = Font.boldSystemFont(10)
        aqiText1.textColor = Color.black()
        aqiText1.centerAlignText()
        aqiText1.minimumScaleFactor = 0.7
    } else if (aqi >= 51) {
        aqiText.textColor = Color.white()
        widget.backgroundColor = new Color("#66b266")
        let aqiText1 = widget.addText("MÄSSIG:☝️")
        aqiText1.font = Font.boldSystemFont(10)
        aqiText1.textColor = Color.black()
        aqiText1.centerAlignText()
        aqiText1.minimumScaleFactor = 0.7
    } else if (aqi >=0) {
        aqiText.textColor = Color.white()
        widget.backgroundColor = new Color("#006600")
        let aqiText1 = widget.addText("GUT 👍")
        aqiText1.font = Font.boldSystemFont(12)
        aqiText1.textColor = Color.white()
        aqiText1.centerAlignText()
    }
        else {
        aqiText.textColor = Color.red()
        widget.backgroundColor = Color.white()
    }
    widget.addSpacer()

    //Last Update of Data
    let dateText = widget.addText(date + " (Messzeit)")
    dateText.font = Font.regularSystemFont(7)
    dateText.centerAlignText()
    dateText.minimumScaleFactor = 0.2
    
    widget.addSpacer()
    
     //Contribution to World Air Quality Project
    let Text = widget.addText("A World Air Quality Project")
    Text.font = Font.regularSystemFont(6)
    Text.textColor = Color.black()
    Text.centerAlignText()
    Text.minimumScaleFactor = 0.2
  
  return widget
}

//Get City from Air Quality Open Data Platform
async function getData(keyword) {
    let req = new Request(`https://api.waqi.info/search/?keyword=${keyword}&token=19b71483eb9ddd3831a5e83312cd860fb00fa03d`)
    req.method = "GET"
    let response = await req.loadJSON()
     
    if (Object.keys(response.data).length != 0) {
        var result = '{"aqi" : "'+response.data[0].aqi+'", "date" : "'+response.data[0].time.stime+'"}'        
    } else {
        var result = '{"aqi" : "N/A", "date" : "k. A."}'        
    }
    return result
}
//Search Keyword in Air Quality Open Database
if (config.runsInApp) {
    // Demo in-App visit https://aqicn.org/ for more cities
    let keyword = "Berlin"
    let data = await getData(keyword)
    data = JSON.parse(data)
    let widget = createWidget(keyword, data.aqi, data.date)
    widget.presentSmall()
} else {
    // Not in-App - use of fixed Parameter
    let keyword = args.widgetParameter
    let data = await getData(keyword)
    data = JSON.parse(data)
    let widget = createWidget(keyword, data.aqi, data.date)
    Script.setWidget(widget)
}
Script.complete()

Wirklich cool.. 👍