MyToDoo

MyToDoo is a highly personalizable to-do list app. Customize each list with colors, borders and themes, set up swipe and tap gestures, and set local reminders with adjustable snooze, with no internet required.

It's free and has no ads, and your data stays on your device. The free version includes up to 5 lists. An optional one-time Premium upgrade unlocks unlimited lists and tasks, full customization and exclusive theme presets.