Android boot manager is modern reliable dual-boot solution, with growing number of supported devices. It allows you to boot different operational systems, such as Android, Ubuntu Touch, SailfishOS on your smartphone.
We use LVGL for displaying boot menu on all platforms. We have growing and friendly community. And strong intention to increase the number of supported devices.
If you have any troubles with Android Boot Manager, please, consult our Wiki first. In case some questions remained, do not hesitate to contact us