Simple Cardio Log is a minimalistic logging tool for cardio workouts. Allows you to add exercises and log workouts using those exercises, keeping track of time, calories, and a unit of measurement specific to the exercise (miles, kilometers, steps, etc). When logging, displays previous workouts for the same exercise for comparison purposes.
Please note that this app is intentionally minimal in feature set to keep workout tracking an unobtrusive aspect of fitness. This app is meant to substitute for a clipboard, paper, and pencil, nothing more.
It requires very few permissions, and doesn't use internet at all, so it works offline or in Airplane mode.
Logs are stored in a simple, readable JSON format, which can be synchronized across devices using something like DropSync/Dropbox. Logs are stored in `/sdcard/SimpleHealthSuite/Cardio/Logs`, split by day.
This app is free and open source, code can be found at https://github.com/rodhilton/SimpleCardioLog