+1 from the app store reviews:

This is a great app. I’m using it daily in my free time to learn. The bookmarking ability is very useful. What I found a bit annoying is that the “Categories” that show up in the bottom of desktop version of articles are excluded in the app version. I really like those because they give me a way to explore other pages/articles in the same category. Hope they add them to the app version.

+1 user through the iOS support email:

"Good morning,
I was wondering if you could add the ability to view categories to your roadmap items for the iOS app?
Categories are a very important part of how you use Wikipedia, and I find myself using the mobile app more and more as time goes on."

+1 user through the app store reviews:

Just wondered why it’s not possible to view which categories an article belongs to (like it is on the desktop version)

+1 user through the support emails:
Hallo Wikimedia Team,

First of all thank you for keeping Wikipedia free.

Here is a suggestion that i would like to make.
In Wikipedia app, it possible to sort articles in different categories so that i get to see the top read articles if i select one particular category.
So let say out of 100s of different categories i select Country then i get the suggestion of top read articles on the countries and so on.

+1 through the support email in September, 2024

+1 on adding categories to the app. They're not just useful—they're a proven tool for efficient discovery and deeper engagement.

There's interesting research backing this up. Stijn Vandamme et al. (2014) found that category-based browsing significantly outperformed traditional text search: users needed only 1 category query + 2.49 clicks on average to achieve a 68.3% success rate in finding relevant information, compared to 5.68 text search queries for the same result. Categories effectively reduce friction in exploration.

This aligns perfectly with what users in this ticket are asking for Some reviews mention using categories to "explore other pages/articles in the same category" exactly the kind of serendipitous, "rabbit hole" engagement that makes Wikipedia sticky. On mobile, where typing is cumbersome, categories offer a low-effort path to discovery.

There are also lightweight, category-driven tools like Citation Hunt or the Microtask Tool that could theoretically integrate with the app to help users contribute in small ways from their phones—another potential angle.

In short: categories are a low-cost, high-impact feature for discovery, engagement, and even contribution.