Step 1
Write down your recent periods
Open your Flo calendar and note the start dates of your last few periods.
Flo vs Her Good Days
Her Good Days vs Flo
Flo is the best-known period tracker, with about 2 million ratings on the US App Store. Her Good Days is free, and built for the years when cycles start to change. Here's how they compare, with a source for every Flo fact.
- Checked October 30, 2026
- Every Flo fact linked to its source
Comparing more apps? See period tracker apps, compared or Flo alternatives.
Every feature free
No paid tier, nothing to cancel
| At a glance | Flo | Her Good Days |
|---|---|---|
| Price | Free tier; Premium in-app purchases from $1.99 to $59.99 (App Store) | Free. No paid tier; an optional shop sells wellness products |
| What you pay for | Personal insights, Symptom Checker, Health Assistant, deeper pregnancy features | Nothing |
| Privacy | Says it has never sold user data; FTC order in 2021 (FTC) | No data sales, no third-party ads; Private mode |
| Menopause | Perimenopause Score, Menopause Timeline | Hot flashes by week, sleep next to night sweats, a doctor report |
| Verdict | Fits if you want fertility insights, expert videos and an Apple Watch app | The pick if you want every feature free and a log built for your 40s and 50s |
Where Her Good Days is different
Everything free, and a log that follows your stage
Flo keeps its personal insights, Symptom Checker and Health Assistant in Premium, and its US listing shows Premium prices from $1.99 to $59.99 without saying which plan is which (App Store). Her Good Days has no paid tier at all.
The bigger difference is what the app puts in front of you. In perimenopause, the + Log button opens on hot flash, period, sleep, mood and brain fog. At night it moves night sweats to the top. Each symptom gets mild, moderate or severe and the time, so the doctor report can say how often and how strong.
Feature by feature
Flo vs Her Good Days, side by side
Where Flo doesn't publicly say, the cell says so rather than guessing.
| Flo | Her Good Days | |
|---|---|---|
| Price | Free tier. Premium from $1.99 to $59.99 in the US App Store, FSA/HSA eligible (Flo) | Free. No paid tier; an optional shop sells wellness products |
| Periods | Yes, with predictions | Period start and flow; your next period shown as a range |
| Fertile days | Ovulation and fertile-window predictions; fertility insights in Premium | Estimated fertile days, labeled "Not birth control"; never in teen mode |
| Ovulation tests | LH tests and basal temperature | Ovulation test results with the time, in the Cycle mini app |
| Birth control | A paid Birth Control Reminder add-on ($43.99 in-app purchase) | No. It's not birth control |
| Symptoms | A long symptom list; Symptom Checker for PCOS, endometriosis and fibroid symptoms in Premium | Hot flashes, night sweats, brain fog, joint pain, cramps and PMS, each mild, moderate or severe |
| Perimenopause and menopause | Perimenopause Score, Menopause Timeline, sleep, energy and mood changes | Hot flashes per week and the hours they cluster in, sleep next to night sweats, cycle gaps over 60 days |
| Pregnancy | Pregnancy mode, with deeper pregnancy features in Premium | Week and due date, appointments with your questions, kick counter, contraction timer, a baby card each week |
| After birth | Not stated in the listing | Bleeding per day, pelvic floor, feeding if you want it, sleep in blocks |
| Report for your doctor | Cycle reports for your doctor | A PDF for the dates you pick: periods, cycle lengths, each symptom with how often and how strong, sleep, medications, your notes |
| Workouts | Expert-led videos in Premium | Short sessions with our trainers, Sarah and Elena, each with an easier version; audio only and offline |
| Teens | Rated 13+ | From 13. Teen mode has no shop, no weight-loss goals and no fertile days |
| Use without an account | Anonymous Mode: no name, email or other identifiers kept with your data (Flo) | Private mode: no account, and nothing leaves the phone |
| Ads and tracking | App Store label: purchases, location, identifiers and usage data used to track you | No third-party ads and no outside analytics or ad code. Adults see the app's own cards |
| Community | Secret Chats in Premium | No forums or chat |
| Watch and wearables | Apple Watch app | Not yet. Steps come in from Apple Health or Health Connect |
| Platforms | iPhone, Apple Watch, Android | iPhone and Android |
How we source this. Flo cells come from the US App Store listing, Flo Premium, the privacy FAQ and the Anonymous Mode FAQ, checked October 30, 2026. Where Flo doesn't say, the cell says so. Her Good Days cells describe the app as it ships. If anything here is out of date, write to us from the contact page and we'll fix it. Flo is a trademark of its owner; Her Good Days isn't affiliated with it.
Pricing
Flo pricing vs Her Good Days
Prices are the US App Store in-app purchases on October 30, 2026; Flo's own page says there are monthly and yearly plans and keeps current prices in its Help Center (Flo).
Her Good Days
Free, every feature
| Every feature | $0 |
| Paid tier | None |
| Trial | Nothing to cancel |
| Optional shop | Wellness products, never based on your logs |
Flo
Free tier, then Premium
| Free | Cycle tracking and core tools |
| Flo Premium | $1.99 to $59.99 (in-app purchases, plans not labeled) |
| Ovulation & Health tracker | $11.49 or $14.99 |
| Birth Control Reminder | $43.99 |
| Pregnancy Tracker | $49.99 |
Privacy
Flo's privacy record, in short
In June 2021 the FTC finalized an order against Flo Health. It alleged Flo shared health data from millions of users with marketing and analytics firms, including Facebook and Google. The order requires consent before sharing health data and an independent review of its privacy practices (FTC).
In August 2025 a California jury found Meta liable for collecting Flo users' data; Flo and Google settled their part of that case (TechCrunch).
Flo now says it has never sold user data and makes money from subscriptions, and that with your consent it may share some non-health data with AppsFlyer or Firebase for advertising (Flo privacy FAQ).
- Her Good Days: Private mode, no account, nothing leaves the phone
- No third-party ads or outside ad code
- Download or delete everything in the app. How privacy works
Which one to pick
| Pick Her Good Days if | Flo fits if |
|---|---|
| You want fertility insights and pregnancy content in one app. |
How to switch from Flo
Step 2
Install Her Good Days and pick your stage
Onboarding asks your stage and your last period. Choose Private mode if you don't want an account.
Step 3
Keep Flo until you're sure
Give it a few weeks. If you leave, close your Flo account as well as deleting the app.
Other comparisons
Questions
Is Flo safe to use?
Flo says it has never sold user data, offers Anonymous Mode, and has been under an FTC order since 2021 that requires consent before it shares health data (FTC). Its App Store label still lists four data types used to track you. Read the label and decide.
What's the best free alternative to Flo?
For cycles alone, Apple Health on an iPhone is free and private. Her Good Days is free on iPhone and Android, with no paid tier, and adds menopause, pregnancy, sleep and a doctor report.
Is Her Good Days really free?
Yes. There's no paid tier. An optional shop at the end of Today sells wellness products, and it never sees what you log.
Can Her Good Days replace Flo for trying to conceive?
Partly. It shows estimated fertile days and logs ovulation test results, labeled Not birth control. Flo has more fertility tools.
Start with today
Her Good Days is free, with no third-party ads and nothing to subscribe to. Free on iPhone and Android.