The Photos app has the appearance of a lightweight photo album and not much else. The truth is that it has some very advanced features. Search is one.
If you have a big photo album, search is a way to find what you look for faster. You can search for thousands of things in your photos. Places, objects, facial expressions, years, months. For a list of 4 432 things you can search take a look at this article by Kay Yin.
This is how you find search in Photos:
- Open the Photos Album tab.
- Tap the magnifying glass in the top right corner to open search.
- Write your search phrase in the search box.
As you type you will see the search results below. For every letter you type, the results are getting narrower.
I searched for toy and were surprised to see that it found photos of people but with a small toy present somewhere in the picture. A search for aug finds all photos taken in august of any year. Birth finds birthday cakes. Sto finds photos taken in Stockholm as well as a couple taken in a car driving on a road named "Stockholmsvägen" that is not located in Stockholm. Wed finds Wedding photos.
Search doesn't always get it right but to me it's not a big problem if there are some irrelevant photos among all the relevant ones. It put a birthday photo without a birthday cake in the birthday cake category.
All in all photo search is an iOS feature well worth exploring. And it's totalt free. ;-)