Comparison

ULA Period Tracker vs Diamond Period Tracker

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

Head to head
About

ULA Period Tracker

Features
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Your cycle should not be a product. Keep it yours with ULA. ULA is the period tracker built on one non-negotiable principle: everything stays on your device. No servers. No cloud. Your data belongs only to you, no one, not even us, can see your information. You've seen what happens when others do. Most period tracking apps have become something else entirely, wellness platforms, advertising engines, data brokers dressed in pink. They offer horoscopes, social feeds, and premium subscriptions, while your most sensitive health information quietly becomes their most valuable asset. Some have faced the legal consequences. Their users faced worse. ULA is the opposite of all that. One thing, done right. ULA tracks your cycle. That's it.  No social features. No ads. No upsells. No account required. Just an intelligent, private tool that learns your unique pattern, including considerations for irregularities like PCOS or PMS, and gives you predictions for your period, fertile windows, and ovulation. All on your iPhone. All offline. Track what actually matters: From bleeding intensity to ovulation pain, mood swings to fatigue, ULA gives you the depth to truly understand your body, without broadcasting it to anyone. Log symptoms, sexual activity, and cycle phases with precision. Edit past entries anytime. Your history is yours, no excuses. Nothing hidden. Nothing leaving your phone: ULA's prediction and business logic is open source. Audit it on GitHub. Verify the architecture yourself. We publish our math because we have nothing to hide and because you deserve to know exactly how your data is handled. Not a promise. Proof. ULA Period Tracker: Privacy. Period.

About

Diamond Period Tracker

Read full description

Your Cycle. Your Privacy. Your Diamond. Diamond is a private period tracker, period calendar, menstrual cycle tracker, ovulation tracker, and fertility tracker designed for women who value privacy, elegance, and simplicity. Track your period, predict your ovulation, monitor your fertile window, record symptoms, moods, and energy, and build a complete cycle history—all without creating an account. No sign up. No cloud. No tracking. Your data stays on your device. A BEAUTIFUL PERIOD TRACKER Diamond transforms everyday cycle tracking into a calm and premium experience. Whether you’re tracking your menstrual cycle, using it as a period diary, checking your period calendar, or monitoring your fertility window, Diamond keeps everything beautifully organized. PERIOD & MENSTRUAL CYCLE TRACKER Stay informed throughout every stage of your cycle. •Period tracker •Menstrual cycle tracker •Cycle calendar •Period calendar •Ovulation tracker •Fertility tracker •Fertile window prediction •Period prediction •Cycle prediction •Cycle length tracking •Period log •Menstrual calendar Understand your body with accurate and simple tracking. LOG YOUR DAILY SYMPTOMS Record everything that matters. •Flow intensity •Cramps •Headache •Bloating •Breast tenderness •Mood tracking •Energy tracking •Notes & reflections •Daily journal Over time, Diamond helps reveal patterns in your cycle. SMART CYCLE INSIGHTS Your personal history becomes meaningful insights. •Cycle Archive •Period history •Symptom history •Mood history •Future period predictions •Ovulation estimates •Fertility window estimates Understand how your cycle changes month after month. PRIVATE BY DESIGN Privacy isn’t a feature. It’s the foundation. Diamond never asks you to create an account. •No sign up •No email •No cloud storage •No third-party tracking •No data collection •Local storage only •Complete control of your personal information Your health data belongs to you. THE VAULT Protect your most personal notes with a secure PIN. Store private reflections, cycle notes, and personal journal entries inside your private Vault. Only you can access them. PREMIUM EXPERIENCE Designed to feel elegant every day. •Beautiful Light Mode •Luxurious Dark Mode •Clean minimalist interface •Smooth navigation •Fast performance Diamond focuses on clarity, comfort, and privacy—not clutter. WHY WOMEN CHOOSE DIAMOND •Private period tracker •Period calendar •Menstrual cycle tracker •Ovulation tracker •Fertility tracker •Symptom tracker •Mood tracker •Wellness journal •Local storage •PIN Lock •Beautiful design •No account required •No cloud •Zero tracking Download Diamond today and experience a private, elegant, and beautifully designed period tracker made for everyday cycle tracking. Diamond — Your Private Period Tracker. Privacy Policy https://sites.google.com/view/diamondperiodtracker/home Terms of Use (EULA) https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

ULA Period Tracker4 screens
Diamond Period Tracker4 screens

Verdict

The call

The clearest difference is update cadence: Diamond Period Tracker at every 4 weeks against ULA Period Tracker's every 3 months. Diamond Period Tracker also leads on iOS requirement (16.6 vs 26.0). On price, ads, in-app purchases 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. ULA Period Tracker sells 4 one-off in-app purchases and Diamond Period Tracker sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

ULA Period Tracker ships an update every 3 months, Diamond Period Tracker every 4 weeks. The most recent releases landed on October 28, 2026 and November 5, 2026 respectively.

Scorecard2 real differences · 4 level
ULA Period Tracker versus Diamond Period Tracker: the parameters behind the verdict, then further details
ParameterULA Period TrackerDiamond Period Tracker
PriceFreeFree
Update frequencyEvery 3 monthsEvery 4 weeks — better
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, Apple Watch — betteriPhone
Requires iOS26.016.6 — better
Further details — not scored
Size10 MB11 MB
Age rating12+4+
DeveloperJeronimo Emiliano Ainchil CalahorraElvin tansu Dogan

In-app purchases

4 purchases

ULA Period Tracker

One-time4
  • Small Tip$0.99
  • Medium Tip$2.99
  • Large Tip$3.99
Show 1 more
  • Huge Tip$8.99
2 purchases

Diamond Period Tracker

Subscriptions2
  • Monthly$9.991 Month
  • Yearly$69.991 Year

Questions

Is ULA Period Tracker free?
ULA Period Tracker is free to download, with in-app purchases available.
Is Diamond Period Tracker free?
Diamond Period Tracker is free to download, with in-app purchases available.
Do ULA Period Tracker or Diamond Period Tracker have ads?
Neither ULA Period Tracker nor Diamond Period Tracker shows ads.
Which is updated more often, ULA Period Tracker or Diamond Period Tracker?
ULA Period Tracker ships an update every 3 months, and Diamond Period Tracker every 4 weeks. Most recently, ULA Period Tracker was updated on October 28, 2026 and Diamond Period Tracker on November 5, 2026.

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