Comparison

Ovulation Estimator vs ZoeFlow

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

Head to head
About

Ovulation Estimator

This health tool helps you estimate your ovulation date. Simply enter your last menstrual period and cycle length to predict your most fertile days. It's designed for women tracking their reproductive health.

Highlights
  • Ovulation date calculation
  • Last menstrual period input
  • Period cycle length input
  • Fertile window prediction
  • Health and fitness tracking
Features
Read full description

Using this calculator know your ovulation date. Input your last menstrual period and period cycle to calculate the probable date of ovulation. Please give your valuable comments and ratings for further improvement.

About

ZoeFlow

Features
Read full description

ZoeFlow – Period Tracker, Ovulation Tracker & Fertility Calendar ZoeFlow is a smart, accurate, and easy-to-use period tracker, ovulation tracker, fertility tracker, and pregnancy calendar designed to help you understand your menstrual cycle and reproductive health. Whether you want to track your period, predict ovulation, monitor fertility, or plan pregnancy, ZoeFlow gives you reliable predictions, daily insights, and helpful reminders - all in one private app. Period Tracker & Menstrual Cycle Calendar Track your period cycle with confidence using ZoeFlow’s advanced period tracker and menstrual calendar. • Track period dates and cycle length • Know your current cycle day instantly • See days remaining until your next period • Get accurate period predictions and reminders • Visual calendar for period, fertile, and ovulation days ZoeFlow’s period calculator learns from your cycle history to improve predictions over time. Ovulation Tracker & Fertility Predictor Understand your fertile window and ovulation timing using ZoeFlow’s intelligent ovulation tracker and fertility calculator. • Estimated ovulation day prediction • Fertile window visualization • Pregnancy chance indicators • Fertility insights based on your cycle Whether you’re trying to conceive or avoid pregnancy, ZoeFlow helps you stay informed about your fertility. Daily Cycle Insights & Symptom Tracker Track how your body changes during each menstrual phase. • Log symptoms, mood, discharge, and notes • Track hormonal phases and energy levels • Understand your daily body signals • Build awareness of your menstrual health ZoeFlow transforms daily tracking into meaningful reproductive health insights. Cycle History, Reports & Analysis Review your past menstrual cycles and identify patterns easily. • Compare cycle lengths and period duration • Identify irregular or changing cycles • Color-coded reproductive health calendar • Timeline view of your cycle history Your data helps ZoeFlow provide smarter cycle predictions over time. Smart Reminders & Health Tools Stay organized with built-in reminders and notifications. • Period reminders • Ovulation alerts • Medicine reminders • Daily health logging and notes Everything stays private, secure, and accessible only to you. Built-in Women’s Health Calculators ZoeFlow includes essential calculators for fertility and pregnancy planning: • Ovulation Calculator • Pregnancy Calculator • Due Date Calculator • Implantation Calculator • IVF & Ultrasound Due Date Tools • Ideal Weight Calculator From cycle tracking to pregnancy planning, ZoeFlow supports every stage of your journey. Learn with Women’s Health Guides Read helpful articles about menstrual health, fertility, pregnancy, and hormones. • Fertility awareness education • Pregnancy wellness tips • Cycle health guidance • Hormonal balance insights ZoeFlow is more than a period tracker - it’s your complete women’s health companion. Why Choose ZoeFlow? • Accurate period tracker and ovulation predictor • Personalized fertility insights • Clean, modern, and easy interface • Private and secure tracking • Smart predictions powered by your cycle data ZoeFlow – Period Tracker, Ovulation Tracker & Fertility Calendar Download ZoeFlow today to track your period, predict ovulation, monitor fertility, and understand your body with confidence. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Ovulation Estimator3 screens
ZoeFlow4 screens

Verdict

The call

The clearest difference is in-app purchases: Ovulation Estimator at none against ZoeFlow's 2. ZoeFlow's advantage is update cadence (every 8 days vs every 6 months) and iOS requirement (15.0 vs 18.0). On price, ads and device support 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. ZoeFlow sells 2 in-app purchases, starting at $1.99 per month. Ovulation Estimator asks for nothing beyond the download.

UpkeepUpdate frequency

Ovulation Estimator ships an update every 6 months, ZoeFlow every 8 days. The most recent releases landed on October 16, 2026 and October 25, 2026 respectively.

Scorecard3 real differences · 6 level
Ovulation Estimator versus ZoeFlow: the parameters behind the verdict, then further details
ParameterOvulation EstimatorZoeFlow
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 6 monthsEvery 8 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPadiPhone, iPod
Requires iOS18.015.0 — better
Further details — not scored
Size6 MB124 MB
Age rating4+12+
DeveloperMalay PatelBLOOM IT TECH

In-app purchases

None

Ovulation Estimator

No in-app purchases

2 purchases

ZoeFlow

Subscriptions2
  • Monthly$1.991 Month
  • Yearly$12.991 Year

Questions

Is Ovulation Estimator free?
Ovulation Estimator is free to download, with no in-app purchases.
Is ZoeFlow free?
ZoeFlow is free to download, with in-app purchases available.
Do Ovulation Estimator or ZoeFlow have ads?
Neither Ovulation Estimator nor ZoeFlow shows ads.
Which is updated more often, Ovulation Estimator or ZoeFlow?
Ovulation Estimator ships an update every 6 months, and ZoeFlow every 8 days. Most recently, Ovulation Estimator was updated on October 16, 2026 and ZoeFlow on October 25, 2026.

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