Awesome

BetterCounter

<img alt="BetterCounter icon" src="app/src/main/res/mipmap-xhdpi/ic_launcher.png" width="64">

A multi-purpose counter app

Track good and bad habits (eg: exercising, smoking, drinking...)
Track when's the last time you did something (eg: water your plants, change your bedsheets, poop...)
Count your lives in MtG

Get it now!

From F-Droid
From the Play Store

Features

Records the date and time of each individual counter increase.
Graphs your data over time and calculates statistics.
Lets you export your data (eg: to analyze it with your choice of tools).
Your data is never sent to any server (except for Google's app backup, if enabled).
Simple as hell and will stay this way.

Screens

<img alt="BetterCounter screenshot" src="screenshot.png" width="300">