Where did my work go? – Photo Editor- Review

I like the tools and options, which seemed easy to use as I test drove this app. However, my work was not saved. Nor was I prompted to save. As far as I can tell, the collage I made erased. Not sure. Other apps I have tried let you save to camera roll as an option. I was even looking for HOW to save when I lost the collage for good. Deleted app since I would no doubt forget to save without a prompt.
Review by Searching for color on Photo Editor-.