Keepsake

Most journaling apps make you feel guilty for not writing enough. Keepsake doesn't. You write one line about your day, pick how you're feeling, and that's it. 15 seconds. At the end of the year you get a colour grid showing every single day — your highs, your lows, the quiet days in between. It started as a Google Sheet I kept for myself. Two years later I built it into something anyone can use.