Comparison

HerFlow vs Red Alert

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

HerFlow

Track your menstrual cycle and share insights with loved ones. Offers personalized tips and educational content to foster understanding and connection between partners, friends, and family.

Highlights
  • Intuitive cycle calendar
  • Period and fertile window prediction
  • Mood and symptom logging
  • Phase-specific insights
  • Shared tracking with partners
  • Supportive tips for loved ones
  • Cycle education
Features
Read full description

Free. No ads. No account. No tracking. Your cycle is personal. Your period app should respect that. Meet HerFlow: a private space to understand your body, feel more prepared and help the people you love support you. Start without signing up, keep your name to yourself and track your own cycle for free. MORE UNDERSTANDING. LESS GUESSWORK. Get to know the patterns behind your periods, moods and energy. See what may be coming, capture how you feel and make sense of your cycle, one day at a time. FEEL UNDERSTOOD BY THE PEOPLE YOU LOVE Your cycle can be easier to talk about when you don't have to explain everything from scratch. Share your random code with a partner, friend or family member so they can follow your cycle phase and find thoughtful ways to support you. Choose when to share a mood or note. Pause sharing or change your code whenever you want. SMALL DETAILS. EVERYDAY DIFFERENCE. • Feel more prepared with a period calendar, estimated ovulation and fertile days. • Get to know all five cycle phases with everyday self-care tips. • Make space for how you feel: log moods, symptoms, flow and personal notes. • Spot patterns in cycle length, period length and mood over time. • Stay on top of your routine with period, daily check-in, medication and contraception reminders. • Make HerFlow yours with eight themes and a Home Screen widget. • Save confirmed periods, flow and selected symptoms to Apple Health when you choose. PRIVATE, WITHOUT THE SIGN-UP No account or real name required. No ads, advertising tracking or usage analytics. Your name stays on your device. Sharing uses a random code: a small cycle summary is stored on our server when you set up your cycle, even before you share the code. You can turn sharing off. Moods and notes are uploaded only for days you choose to share. FREE FOR YOUR OWN CYCLE Personal cycle tracking is free, with no time limit. Following someone else's cycle is available through the optional People subscription, with a free 7-day trial requiring no payment, then monthly or yearly plans. Made by one independent developer. Available on iPhone and iPad, in 15 app languages. Get to know your cycle. Let your people get to know you better. Questions or ideas? support@herflowapp.com HerFlow is not a medical device or a form of birth control. Predictions are estimates. Terms of Use: https://herflowapp.com/terms.html Privacy Policy: https://herflowapp.com/privacy.html

About

Red Alert

This app provides men with practical guidance to understand and support their partner through her menstrual cycle. It offers daily tips, suggested texts, and gift ideas tailored to different cycle phases, acting as an early-warning system for relationships.

Highlights
  • Color-coded cycle phase calendar
  • Daily tactical tips
  • Suggested supportive texts
  • Gift ideas for all budgets
  • PMS and ovulation warnings
  • Local data storage for privacy
Features
Read full description

**Red Alert: Your Relationship Survival System** Every guy knows the feeling—something's off, you're not sure why, and suddenly you're in trouble. Red Alert is your tactical companion for understanding and supporting your partner through her menstrual cycle. **WHAT IT DOES** Red Alert helps you track your partner's cycle and gives you practical, no-nonsense guidance for being a better, more supportive partner. Think of it as your relationship early-warning system. **KEY FEATURES** • Color-coded calendar showing cycle phases (Period, PMS, Ovulation, and neutral days) • Daily tactical tips tailored to each phase • Suggested texts to send that actually help • Gift ideas for every budget (free to $100+) • Daily notifications so you're never caught off guard • PMS warnings with adjustable advance notice • All data stored locally on your device—100% private **HOW IT HELPS** **During Her Period (Days 1-5):** Learn when to step up with comfort, snacks, and zero expectations. **During PMS (Days 22-28):** Get advance warning and specific strategies for navigating emotional sensitivity. **During Ovulation (Days 13-15):** Understand when energy and confidence are at their peak. **Rest of the Month:** Know when it's a green light for plans, conversations, and quality time. **THE TACTICAL APPROACH** Red Alert uses military-style messaging ("Marriage Survival System," "Danger Zone," "Red Alert Mode") to make cycle tracking approachable for guys. No awkwardness, no guessing—just clear, actionable intel. Each day, you'll get: - Phase-specific tips on what to do (and what to avoid) - Ready-to-send text messages that show you care - Gift suggestions from "do the dishes" to thoughtful purchases - Notifications timed to keep you prepared **PRIVACY FIRST** Red Alert doesn't collect ANY personal data. Everything stays on your device. No accounts, no cloud sync, no third-party tracking. Just you and your relationship data, completely private. **WHO IT'S FOR** Red Alert is designed for men in committed relationships who want to be more understanding and supportive partners. Whether you've been together for months or decades, this app helps you show up better every day. **PREMIUM FEATURES (Coming Soon)** • Mood tracking with custom stickers • Detailed cycle analytics and insights • Pattern recognition and trend analysis • Personalized recommendations based on history **GET STARTED** Download Red Alert, enter your partner's last period start date and cycle length, and you're ready. The app handles the rest—giving you daily guidance, timely warnings, and the tools to be the partner she deserves. **Note:** Red Alert is rated 16+ due to mature relationship content.

Screenshots

HerFlow4 screens
Red Alert4 screens

Verdict

The call

The clearest difference is in-app purchases: Red Alert at none against HerFlow's 2. Red Alert also leads on iOS requirement (15.1 vs 17.6). On price, rating, ratings volume and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. HerFlow sells 2 in-app purchases, starting at $0.99 per month. Red Alert asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for HerFlow against 5.0 for Red Alert. Both are backed by a comparable volume of ratings — 4 and 3 respectively.

Scorecard3 real differences · 7 level
HerFlow versus Red Alert: the parameters behind the verdict, then further details
ParameterHerFlowRed Alert
PriceFreeFree
Rating5.0 (4 ratings)5.0 (3 ratings)
Positive reviews—100.0% of reviews
Number of ratings4 — better3
Update frequencyEvery 4 days—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.615.1 — better
Further details — not scored
Size7 MB25 MB
Age rating12+17+
DeveloperStefan DasicBrian Kelley

Customer experience

HerFlow

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Red Alert

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

HerFlow

Subscriptions2
  • People Monthly$0.991 Month
  • People Yearly$9.991 Year
None

Red Alert

No in-app purchases

Questions

Is HerFlow free?
HerFlow is free to download, with in-app purchases available.
Is Red Alert free?
Red Alert is free to download, with no in-app purchases.
Which has better reviews, HerFlow or Red Alert?
HerFlow and Red Alert are both rated 5.0 out of 5 on the App Store, from 4 and 3 ratings respectively.
Do HerFlow or Red Alert have ads?
Neither HerFlow nor Red Alert shows ads.

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