Sample photos bundled with the app ("Try with sample photos" and Store screenshots). All are CC0 / public domain from Wikimedia Commons:

Boxer.jpg: File:Boxer (dog) , Iran 08.jpg (CC0) https://commons.wikimedia.org/wiki/File:Boxer_(dog)_,_Iran_08.jpg
Coffee.webp: File:Black coffee cup (Unsplash).jpg (CC0) https://commons.wikimedia.org/wiki/File:Black_coffee_cup_(Unsplash).jpg
Dunes.avif: File:4WD@dunes(byDEM).JPG (CC0) https://commons.wikimedia.org/wiki/File:4WD@dunes(byDEM).JPG
IMG_4501.HEIC: File:Bierstadt Lake Trail, Rocky Mountain National Park, 2009.jpg (CC0) https://commons.wikimedia.org/wiki/File:Bierstadt_Lake_Trail,_Rocky_Mountain_National_Park,_2009.jpg
IMG_4502.HEIC: File:Eagle Peak, New Zealand.jpg (CC0) https://commons.wikimedia.org/wiki/File:Eagle_Peak,_New_Zealand.jpg
IMG_4507.HEIC: File:Cascade de Bras Rouge 2024.jpg (CC0) https://commons.wikimedia.org/wiki/File:Cascade_de_Bras_Rouge_2024.jpg
IMG_4512.HEIC: File:Autumn Forest (201072635).jpeg (CC0) https://commons.wikimedia.org/wiki/File:Autumn_Forest_(201072635).jpeg
IMG_4518.HEIC: File:Macro Flower 2.jpg (CC0) https://commons.wikimedia.org/wiki/File:Macro_Flower_2.jpg
IMG_4520.HEIC: File:Blurry lavender field.jpg (CC0) https://commons.wikimedia.org/wiki/File:Blurry_lavender_field.jpg
IMG_4523.HEIC: File:Chateau Frontenac illuminated at night in Quebec City.jpg (CC0) https://commons.wikimedia.org/wiki/File:Chateau_Frontenac_illuminated_at_night_in_Quebec_City.jpg
