Switch from Flo
Leaving a period app is usually about one quiet preference: where your cycle, sex, and contraception notes live. Flo is the tracker most people already know. Lua is a privacy-first iOS alternative built so those logs never leave your phone.
Why switch from Flo to a private period tracker
Flo’s typical product is an account plus cloud storage. You can use Flo without signing up (unregistered, on-device), and Flo also offers Anonymous Mode. Anonymous Mode still stores health data on Flo’s servers, unlinked from your name and email. That is a real privacy upgrade inside a server architecture. It is not the same as “nothing ever left the device.”
Lua takes the third path. There is no Lua account. There is no Lua server for health logs. Bleeding, sex, symptoms, mood, contraception, and pregnancy entries stay in private storage on your iPhone. No ads, no ad IDs, no crash reporters. The app sends anonymous usage analytics through PostHog; your entries stay on your phone.
If you want the longer evidence table — Lua next to Flo, Clue, Euki, and drip on the three axes that matter — read private period tracker apps.
Flo vs Lua: what actually differs
This table sticks to structural privacy and the locked Lua free / Lua+ gate. Flo’s Premium and fertility feature set change over time — check Flo for what is gated today. Lua’s free and Lua+ columns are exact.
| Feature | Flo (typical) | Lua free | Lua+ |
|---|---|---|---|
| Account | Usually yes; optional unregistered + Anonymous Mode | No | No |
| Health logs on company servers | Yes (typical). Anonymous Mode still stores health data on Flo’s servers, unlinked from name/email | No | No |
| Ads / health telemetry | Marketing SDKs for non-health data per Flo’s current policy; health logs still on Flo’s machines for account use | No ads; anonymous usage via PostHog | Same |
| Log bleeding | Yes | Yes | Yes |
| Calendar, period predictions and cycle insights | Yes (typical) | Yes | Yes |
| Log sex / symptoms / mood (daily check-in) | Yes (typical) | Yes | Yes |
| Method screens and reminders (pill, patch, ring, shot, IUD, implant) | Varies, check Flo | No | Yes |
| Period and check-in reminders | Check Flo | Yes | Yes |
| Stats cards | Often Flo Premium (confirm in-app) | Some | All |
| TTC and pregnancy modes | Flo offers fertility features (see Flo) | No | Yes |
| Next-period confidence detail and PDF export | Check Flo | No | Yes |
| Cross-device cloud sync | Yes (typical) | No | No |
| Face ID / biometric lock | Check Flo | Optional | Optional |
| Platform | iOS and Android | iOS only | iOS only |
Lua+ in the US is $6.49 a month or $39.99 a year, billed by Apple. Period, sex and check-in logging stay free either way.
What else Lua does differently
Local reminders. If you use Lua+, method reminders are scheduled on the device. They still fire in airplane mode. There is no push server and no push token for those clocks.
Optional Face ID. A biometric lock can gate the screen. iOS checks the face or fingerprint; Lua never sees it. That lock is not a second encryption layer on the file — your iPhone’s device encryption is what protects on-disk storage when you have a passcode.
Optional Apple Health. Off by default. Lua reads periods, temperature and HRV from Health, and writes back only the periods you log.
iOS only. There is no Android app. If you need Android, local-first peers such as Euki and drip are worth a look on the comparison page.
How to switch from Flo to Lua
Lua can import your history from Flo in Settings, under Import data. The rest of the move is short.
- Save an export from Flo. Lua can import that file in Settings, under Import data. Lua does not connect to your Flo account; the file is read on your phone.
- Install Lua from the App Store. Open it and start logging. No account, no email.
- Optional: Apple Health. In Lua, turn on Apple Health if you want. The toggle is off by default. Lua can read up to 12 months of past periods, basal body temperature and HRV from Health, and writes back only the periods you log in Lua.
- Re-log what Health does not cover. Symptoms, sex, mood, and contraception details that never lived in Health need to be entered again, or left behind if you prefer a clean start.
- Add Lua+ if you want method reminders. The pill, patch, ring, shot, IUD and implant screens and their reminders are part of Lua+. The calendar, predictions, cycle insights, and logging your period, sex and daily check-in are free.
Soft next step
If the reason you are leaving Flo is that you want the log on your phone and nowhere else, Lua on the App Store is built for that. For the full privacy comparison with Flo, Clue, Euki, and drip, see private period tracker apps.
Frequently asked questions
The things people ask us most.
Does Flo require an account?
Usually, for the product Flo builds and markets. Flo also documents an unregistered on-device mode, and Anonymous Mode. Anonymous Mode keeps health data on Flo’s servers without attaching your name and email. Lua has no account path at all.
Does Lua store my cycle on its servers?
No. There is no Lua server for health logs. Entries stay on your iPhone.
Will switching delete my old app data?
Installing Lua does not touch your old app. What happens to that account, export, or deletion is their process — follow their settings and support if you want that history removed from their side.
Can I import my history into Lua?
Yes, from Flo or Clue. Save an export from that app, then in Lua open Settings, then Import data, and choose the file. It is read on your phone. Lua cannot import from Stardust or Clover, so past periods from those apps can be entered by hand, or brought in from Apple Health if Health already has them.
Is Lua free?
Lua is free to download, with no ads. The free version covers the calendar, period predictions and cycle insights, logging your period and sex, the daily check-in for symptoms, mood and energy, and reminders for your expected period and the daily check-in. Lua+ adds the pill, patch, ring, shot, IUD and implant screens and their reminders, trying to conceive and pregnancy modes (temperature, mucus and ovulation tests, kicks and contractions), the next-period confidence detail, all Stats cards, and PDF export. Lua+ is a monthly or yearly subscription billed by Apple, and you can cancel any time in your Apple Account subscription settings. Deleting the app does not cancel a subscription. Details are in our terms.
One app for your cycle, contraception, fertility and pregnancy.
Private, flexible and designed to adapt with you.