I own a bunch of iPhone photo effect apps (more than 30, I think), and the large majority have no subtlety, so your "warm tone photo" looks like like you took a photo with a large incandescent light bulb behind you. Tiffen is an honest-to-God professional lens and filter company for photographers and movies, and the results are very nice. You can make your photo grotesque if you want, but you can also just tweak it a little, to bring out facial expressions, etc. The screen shots look like all the other apps, but once you select the basic theme of the filter, you then have the option of 10% to 100% expression of that filter, 10% at a time (so you can repeat the photo treatment, if you choose. That subtlety makes all the difference.
alwaysmprest about Digital Film Tools, v5.0.3