Day One is the journaling app most people are measured against, and for good reason: it is polished, it runs everywhere Apple and Android do, and its free plan now includes end-to-end encryption. People still look for a Day One alternative for three reasons: the yearly plans, the account and cloud at the centre of it, and a wish to keep a diary in something simpler or more durable.
The six apps below each answer one of those. We build Dash, so it is listed first and judged by the same rules as the others.