The best alternatives to Airtool are Wi-Fi Widget, Speedify, and Almighty. If these 3 options don't work for you, we've listed a few more alternatives below.
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Speedify is the only VPN that uses channel bonding to make your online experiences faster, more reliable and more secure. Windows, Mac, iOS, Android & Linux
Makes the connection process easier by providing a special QR code Several neat ready to use designs. You need just input your network params and print it. Security-focused - all the data is processed on your computer.
yFi is a small utility app that lives in your status bar. It continuously monitors your WiFi TX Rate and reconnects if it's getting bad. This ensures you'll never have those awkward lags and dropouts in online meetings (as we now are working remotely...).
The app solves the problem when you are connected to the network, but the quality of the connection is poor or the Internet access is limited. If a bad connection is detected, the app will notify you so you can fix the problem.