What are some alternatives?
When comparing MakeAppIcon and Minimal Dual Tone Icons, you can also consider the following products
IconStore - Free icon packs by first-class designers
EasyAppIcon - EasyAppIcon helps you to create your own app icons easily. Supporting Android Adaptive Icon!
AppIconizer - Icon generator for App Store & Play Store submissions.
App Icon Resizer - A service to resize your app icon to all needed resolutions
Icon 54 - 5,000 icons for iOS, android, websites & apps 🚀
Flat Icon Generator - Create stylish, flat icons for Android apps.