Most period apps send your data to a server. Bluma doesn't.
CTA 1: Get it on Google Play CTA 2: Join the iOS waitlist
Log your periods and get predictions for your next period, ovulation, and fertile window, so you can plan ahead.
Track symptoms, moods, flow, discharge, and other health markers to identify patterns over time and understand what your body is telling you.
See your cycle averages, variations, and full history to learn your unique rhythm and spot when things change.
Create encrypted backups so you can restore your data anytime.
Get gentle reminders before your period, ovulation, and fertile window.
Lock the app with your device’s biometrics (Face ID or fingerprint).
Everything is stored on your device and encrypted. With no cloud storage, there’s nothing to sell, share or leak.
Bluma is designed to be as easy and enjoyable to use as it is private, without the noise of ads and upsells.
Bluma’s code is open source on GitHub for anyone to inspect how it works. You don’t have to just take our word for it.
I was concerned about how health data is handled by many period tracking apps. I tried local-first alternatives, but they felt clunky and lacked features I needed.
Privacy and a good experience shouldn’t be a trade-off. So I built Bluma, designed to be a delight to use while keeping your data on your device.
Maribel Ferreira
Creator of Bluma
Your cycle data is stored on your device and encrypted. Bluma doesn’t require account creation, and your data is never uploaded to a cloud server or shared with third parties.
Yes. You can create encrypted backups and restore them on a new device so you don’t lose your history.
Use Bluma to understand your cycle, but consult with a healthcare provider for family planning or contraception purposes. Bluma is not a contraception method.
Bluma uses your cycle history to make predictions. Recent cycles have more influence on predictions than older ones. For example, most recent cycle: 100%, second most recent: 80%, third most recent: 60%, and so on.
With 3+ cycles, Bluma can provide better predictions, so the more data you log, the more accurate the predictions will be. All calculations are done on your device. Your period data never leaves your phone and is never shared with anyone.
Download Bluma for free and stay in full control of your data
CTA 1: Get it on Google Play CTA 2: Join the iOS waitlist