The Economist app hasn't been the most visually appealing out there, but it was always at least functional. One of the main usability gripes facing the app was a nasty bug (or two, or seven) that caused some serious battery drain if you didn't look out for it and force close or reboot. Now that's no way to code an app, and today its been updated specifically to fix the battery issues. Unfortunately, the app still uses the legacy menu button configuration, which really shouldn't be around in modern apps anymore. Plenty of other developers (big and small) have removed it, and we think The Economist could do the same.
The app is of course most useful if you've committed a bit of money towards a yearly subscription, but there are still some free portions available if you want to get a feel for the content. You can find the app at the Google Play Store link above.