Ecriso is a free Android application developed by Kevin Michel that allows users to flash bootable OS images in ISO format to USB drives and external SD card readers. With its simple and easy-to-use interface, this app makes it easy to select an image, select a device, and write the image to the device.

One of the best features of Ecriso is that it does not require root access, making it accessible to a wider range of users. However, it is important to note that this app does not work with Windows 10 ISO, but it works fine with Linux live images and installer images. Overall, Ecriso is a great utility tool for those who need to flash bootable OS images on their devices.