Looking for a Penzu alternative?
Penzu is a long-established private journal with password-locked entries and free syncing between your phone and the web. MoodSwings is a different shape of app — and this page is an honest comparison rather than a pitch, so the table starts with what Penzu does better.
Penzu vs MoodSwings, side by side
| Penzu | MoodSwings | |
|---|---|---|
| Known for | Penzu is a long-established private journal with password-locked entries and free syncing between your phone and the web. | A calm period tracker built around how you actually feel: next-period and cycle-phase estimates, mood and symptom logging in a few taps, PMS patterns over time, and optional partner sharing. |
| Genuinely better at | Long-form writing and cross-device access — it is a real diary with proper privacy controls behind it. | MoodSwings is not for writing. It captures a mood, a few symptoms and your dates in seconds, which is a different habit entirely. |
| Day to day it feels like | A general mood or symptom journal: you record how you feel day to day, with no cycle underneath it unless you add one yourself. | One screen, a few taps a day. Dates, mood and symptoms in the same place — and if you want, a partner view where you choose what is visible. |
Stay with Penzu if…
…you write proper entries and want them on the web as well as your phone.
We would rather you kept an app that fits than switched and stopped logging after a fortnight. A half-used tracker cannot show you a pattern.
What you get if you do switch
- Predictions that learn your pattern. Next-period, cycle-day and cycle-phase estimates that adjust as you log, instead of assuming a textbook 28 days.
- Mood and symptoms next to your dates. Cramps, bloating, sleep, energy, cravings and how you felt — logged in a few taps, kept as history.
- Your PMS pattern, over months. The days before your period stop being a surprise once you can see them repeating.
- Ovulation and fertile-window estimates when you want them, from your own logged cycles.
- Optional partner sharing, on your terms. You choose whether to share at all and what a partner can see — it is off until you turn it on.
More alternatives
Longer head-to-head guides
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In depthStardust alternative
Stardust leans astrological. A more grounded, relationship-aware option.
MoodSwings is a wellness tracker, not a medical device — predictions are estimates, not guarantees, and nothing here is medical advice. Penzu and other product names belong to their respective owners; this comparison reflects each app's publicly described focus and our own honest read of it. We deliberately quote no ratings, review counts or prices for other apps, because those change — check the App Store for current details.