An offline period tracker app keeps your records on your phone and works without an internet connection. Day to day it feels like any other app; the differences show up in a few situations: backups, changing phones and using more than one device. Knowing how to handle them is what makes offline tracking work well.
What works without internet
Everything you do daily: logging your period, symptoms, mood and fertility signs, seeing predictions, checking your calendar and receiving reminders scheduled on your phone. Calculations run on the device, so a weak signal or airplane mode makes no difference.
Backups: the one habit that matters
Because there is no copy on a server, your exported backup is your safety net. A simple routine:
- Export a full backup after your first few weeks of data.
- Export again roughly once a month, or after logging something important.
- Keep the file somewhere you control, such as a computer or your own storage.
- Keep more than one copy if your history matters to you.
In Bloom Private, full backups are encrypted with AES-256, so the file is protected wherever you keep it.
Using more than one device
| Situation | What to expect |
|---|---|
| iPhone and iPad | Each device keeps its own data; there is no automatic sync |
| Choosing a main device | Log on one device so your history stays complete |
| Sharing a device | Turn on Face ID or Touch ID to keep your diary private |
If you lose or change your phone
Without an exported backup, data that only existed on a lost phone cannot be recovered by anyone. With a backup, you can restore your history on the same device after a reset. This is the honest trade-off of having no server copy.
Why people choose offline anyway
For many, the trade-off is worth it. There is no account linked to your cycle, no server that could be breached or asked to hand over your data, and no third-party analytics. You decide when data leaves your phone, by exporting it or by turning on the optional Apple Health integration.
Getting started
Bloom Private works offline from the first launch, with no account. Your records stay on your iPhone, protected by iOS encryption, unless you choose to export them or turn on Apple Health. For a quick estimate without installing anything, our Try our free period calculator runs in your browser.
Frequently Asked Questions
Everything you use daily: logging, symptoms, predictions, the calendar and reminders scheduled on your phone.
Export a full backup regularly and keep the file somewhere you control. In Bloom Private, backups are encrypted with AES-256.
Yes, but each device keeps its own data because there is no sync. Logging on one main device keeps your history complete.