pMem is an application witch can help you when remembering by prompting you.
Touch the cell in the first view can enter the prompt view. Click 'edit' button to manage the content u want to remember. Click 'start' to start prompting and the content will hide. You can remember or recite and click the 'prompt' button to see if your memory is right, or prompt you when you forget something by show a character or a word or a sentence one by one. For convenience swipe right to prompt instead of click 'prompt' button.