Trainspotter is an Android app designed for trainspotting enthusiasts who want to keep track of their sightings of British trains. The app offers a regularly updated database of UK rolling stock, and allows you to easily log a sighting with only a few button presses. The app also immediately shows you whether you've seen something before, and lets you browse the database. What's more, the app works offline and is completely free and ad-free.

Trainspotter is a must-have app for any trainspotting enthusiast who wants to keep track of their sightings of British trains. With its user-friendly interface and regularly updated database of UK rolling stock, the app makes it easy to log your sightings and keep track of what you've seen. And with the app's offline functionality, you can use it even when you don't have an internet connection. Whether you're a seasoned trainspotter or just getting started, Trainspotter is definitely worth checking out.