Eva is a period tracker built on a simple, stubborn belief: the most intimate data about your body should never sit on someone else's server.
To make private, honest cycle tracking the default — so no one has to trade their body's data for a helpful app.
Most health apps collect first and reassure later. We flipped it. Eva has no accounts, no backend and no analytics — because the safest data is the data that was never collected in the first place.
Everything you log lives on your device. When you want a backup, it goes straight to your own iCloud or Google Drive, encrypted and under your control. There is nothing for us to see, sell, or hand over.
Not a toggle or a promise — it's built into how the app is made.
No dark patterns, no guilt streaks. Eva helps quietly and stays out of the way.
Funded by the people who use it, so we answer to you and no one else.
Eva is made by Skulze LLC, an independent software studio. We're small on purpose — small enough to make principled decisions and stick to them, and to answer an email from a real person.
Questions, ideas, or just want to say hello? Reach us at hello@evahealth.me.