Comparison

Period Tracker · vs One

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

Head to head
About

Period Tracker ·

Track your menstrual cycles, predict symptoms, and understand your fertility window. This app helps you monitor your health, whether you're trying to conceive, avoid pregnancy, or simply gain insight into your body.

Highlights
  • Predict PMS, period, and fertility phases
  • Log symptoms, mood, and habits
  • Track menstrual periods
  • Understand body signals
  • Access unlimited content and articles
Features
Read full description

Welcome to Period Tracker, the app that will make your life easier. Follow your menstrual cycles, get predictions about your pre-menstrual symptoms, your period and ovulation dates, and your fertility window. Whether you'd like to birth control, get pregnant or simply track your health, we're to help! Features: * Get predictions about your PMS, period and fertility phases * Log your symptoms, mood & habits * Track your period * Learn to listen to your body and understand it SUBSCRIPTIONS - You can subscribe for this app to get access unlimited content & articles - Subscription options are: 1-month with 3-day trial Privacy policy : https://www.iubenda.com/privacy-policy/38687662 EULA : https://www.iubenda.com/terms-and-conditions/44220384

About

One

Features
Read full description

Welcome to One-Word Memory Test, your daily companion for cognitive tracking and memory improvement. Designed with science-backed principles, One-Word Memory Test provides a simple, engaging, and effective way to monitor your memory skills over time. Whether you're looking to challenge your brain, build healthy cognitive habits, or just stay sharp, One-Word Memory Test makes it easy to step into a daily routine that fits right in your pocket. SCIENCE-BACKED MEMORY TESTING Our core testing experience is built around structured, continuous assessments. Complete quick, engaging memory tests and track your performance directly from your device. TRACK YOUR PROGRESS Consistency is key. Watch your memory journey unfold with our intuitive Weekly Score Charts. See how you improve week over week and identify patterns in your cognitive performance. BUILD YOUR STREAK Stay motivated by building a daily habit! Our Week Tracker and Streak systems reward you for showing up. Set custom notifications and reminders so you never miss a day of training. GUIDED ONBOARDING & EDUCATION Not sure where to start? Our comprehensive onboarding flow walks you through the science behind the One-Word Memory test. Learn exactly how the tests work and why they matter before you even begin. ONE-WORD MEMORY TEST PRO Unlock the full experience with a Pro subscription: - Weekly reports on your score - Your general memory score - Extra memory tests - Ongoing access to new features Subscription details: - One-Word Memory Test Pro: $1.99 per month, with a 10-day free trial for new subscribers - Payment is charged to your Apple ID account at confirmation of purchase - Your subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period - Your account is charged for renewal within 24 hours prior to the end of the current period - You can manage your subscription and turn off auto-renewal in your Apple ID Account Settings after purchase - Any unused portion of a free trial is forfeited when you purchase a subscription IMPORTANT One-Word Memory Test is for research and self-tracking. It does not provide medical advice, diagnosis, or treatment. If you have concerns about your health, please contact a qualified health professional. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://neurotreatment.com.au/privacy-policy.aspx Questions or support: jaime.berry@neurotreatment.com.au

Screenshots

Period Tracker ·4 screens
One4 screens

Verdict

The call

The clearest difference is in-app purchases: One at none against Period Tracker ·'s 5. Period Tracker ·'s advantage is iOS requirement (13.0 vs 15.1). On price, update cadence, 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. Period Tracker · sells 5 in-app purchases, starting at $6.99 per month. One asks for nothing beyond the download.

UpkeepUpdate frequency

Period Tracker · ships an update every 2 weeks, One weekly. The most recent releases landed on September 28, 2026 and September 20, 2026 respectively.

Scorecard2 real differences · 8 level
Period Tracker · versus One: the parameters behind the verdict, then further details
ParameterPeriod Tracker ·One
PriceFreeFree
Rating4.6 (3.6K ratings) — better—
Positive reviews38.4% of reviews—
Number of ratings3.6K — better—
Update frequencyEvery 2 weeksWeekly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhone, iPodiPhone, iPod
Requires iOS13.0 — better15.1
Further details — not scored
Size33 MB41 MB
Age rating12+17+
DeveloperLuniAdvanced Neuropsychological Treatment Services (ANTS)

Bugs and requests

Period Tracker ·

Reported bugs

4 issues
  • Unable to input last period date
  • Incorrect period start date displayed
  • App freezes when logging symptoms
  • Deleted data after app update

Requested features

4 requests
  • Option to track irregular cycles
  • Integration with other health apps
  • Customizable symptom tracking
  • Calendar view for full cycle history

One

Not enough reviews yet to summarise bugs or requests.

In-app purchases

5 purchases

Period Tracker ·

Subscriptions5
  • Premium Monthly3 Days trial$6.991 Month
  • Premium Monthly3 Days trial$12.991 Month
  • Premium Quarterly$19.993 Months
Show 2 more
  • Yearly Premium3 Days trial$39.991 Year
  • Premium Yearly$49.991 Year
None

One

No in-app purchases

Questions

Is Period Tracker · free?
Period Tracker · is free to download, with in-app purchases available.
Is One free?
One is free to download, with no in-app purchases.
Do Period Tracker · or One have ads?
Neither Period Tracker · nor One shows ads.
Which is updated more often, Period Tracker · or One?
Period Tracker · ships an update every 2 weeks, and One weekly. Most recently, Period Tracker · was updated on September 28, 2026 and One on September 20, 2026.

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