MatLog Libre

This release does not have a Play Store Description, so we grabbed one from version 1.2.0:

Debug your apps. Find error stacktraces. See what your phone is saying about you behind your back. It's all there in the system log, aka logcat!

MatLog shows a scrolling (tailed) view of the Android "logcat" system log, hence the goofy name. It also allows you to record logs in real time, send logs via email, and filter using a variety of criteria.

Color-coded tag names

Easy-to-read column display

Real-time search

Recording mode (with widget)

Save & open from SD card

Send logs as email or attachment

Auto-scrolls when at the bottom of the screen

Search autosuggestions & saved filters

Select and save parts of logs

Open-source and ad-free

Material goodness

^ Above copied from Nolan Lawson's original CatLog app's description.