Anything long winded I type in my notes app then copy and paste. Most note apps will save as you type. For a desktop you can try a word program or start typing an email to your self. Again there is some auto save or draft that should minimize any lose. Once you're done typing just paste it in rokslide then add photos.
Not sure with android but with iPhone I will make a few notes on my phone to remember my thoughts. Then I can pick up from ICloud since it syncs on my computer where I can type in more detail which is a pain on a phone.