Lull vs Daylio (2026)
The verdict: Daylio is the better choice if you want fast, low-effort mood logging with emojis and habits. Lull is the better choice if you want the app to actually interpret your moods — surfacing your best and hardest days and recurring themes — while keeping everything on your device with no account. Both are private and local-first; the real difference is that Daylio logs and Lull interprets.
| Lull | Daylio | |
|---|---|---|
| Mood logging | Yes | Yes |
| Free-text journaling | Yes | Limited |
| Interprets your patterns | Yes (on-device) | No |
| Stored on-device | Yes | Yes |
| No account required | Yes | Yes |
| Daily reminders | Yes | Yes |
Privacy & data handling
Both apps store your data locally and don't require you to create an account, which puts them ahead of cloud-AI journals. The distinction: Lull's design goal is that your entries never leave the device, and the interpretation happens on the phone itself — so you get insight without a cloud round-trip. Daylio similarly keeps data local; neither sells your journal.
Insight
This is the main reason to pick Lull over Daylio. Daylio shows you charts of what you logged; Lull reads the patterns and tells you something — "you tend to feel best on Saturdays," "stress comes up often on your hard days." If you only want a quick mood diary, Daylio is plenty. If you want the diary to help you understand yourself, that's Lull's purpose.
Pricing
Both offer a free tier with a paid upgrade. Lull keeps journaling and mood tracking free forever and charges for the deeper insights, with transparent pricing and no trial dark-patterns. (Check the App Store for current prices.)