Comparison

Tarn. vs Period Tracker; Ovulation App

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

Head to head
About

Tarn.

Features
Read full description

A private health journal that puts your privacy first. YOUR DATA, YOUR DEVICE Everything you log stays on your phone. No accounts. No cloud. No servers. Your health data is encrypted with a PIN only you know. SIMPLE TRACKING • Log daily entries with minimal effort • Track patterns over time • View predictions based on your history • Add notes and custom symptoms BUILT FOR PRIVACY • All data encrypted on your device • No internet connection required • No analytics or tracking • Open source - verify our claims yourself SECURE BY DESIGN • PIN protection with automatic data protection • Optional safety PIN for emergencies • Choose your app icon for discretion Whether you're tracking for health awareness, planning purposes, or personal records, Tarn gives you a simple, private way to understand your patterns without compromising your data. No subscriptions. No ads. No data collection. Just a journal that respects your privacy.

About

Period Tracker; Ovulation App

Features
Read full description

Take control of your cycle with Period Tracker - Cycle Diary, a simple and easy-to-use app for tracking periods, menstrual cycles, symptoms, and daily cycle information. Keep your cycle history organized, understand your patterns, and view estimated upcoming period and ovulation dates in one convenient calendar. Period & Cycle Tracking Log your period start and end dates and keep a clear record of your menstrual cycle. View previous cycles and follow changes over time. Cycle Calendar Use the built-in calendar to see logged periods, upcoming estimated dates, and important cycle information at a glance. Ovulation & Fertility Estimates View estimated ovulation and fertile-window dates based on the cycle information you enter. Predictions are provided for informational and tracking purposes only. Track Symptoms Record daily symptoms and changes throughout your cycle. Keep useful information together so you can better understand your personal cycle patterns. Cycle Diary Maintain a simple diary of your cycle history, period dates, symptoms, and other information you choose to track. Reminders Set helpful reminders for upcoming periods and other cycle-related events so important dates are easier to remember. Key Features - Period tracker - Menstrual cycle calendar - Cycle diary and history - Estimated next period dates - Ovulation estimates - Fertile-window estimates - Daily symptom tracking - Period and cycle reminders - Simple calendar view - Easy-to-use cycle tracking Period Tracker - Cycle Diary makes it easy to keep your menstrual cycle information organized in one place. Important Notice Cycle, ovulation, and fertility predictions are estimates based on the information entered in the app and may not always be accurate. This app is intended for general informational and tracking purposes and is not a medical device. It should not be used for diagnosis, treatment, contraception, or making medical decisions. For medical advice or concerns, consult a qualified healthcare professional. Terms of Use: https://sites.google.com/monadsystems.net/terms-of-use/home Privacy Policy: https://sites.google.com/monadsystems.net/privacy-policy/home

Screenshots

Tarn.4 screens
Period Tracker; Ovulation App4 screens

Verdict

The call

The clearest difference is in-app purchases: Tarn. at none against Period Tracker; Ovulation App's 2. Tarn. also leads on ads (none vs shown). On price, device support and iOS requirement 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; Ovulation App sells 2 in-app purchases, starting at $2.99 per 7 days. Tarn. asks for nothing beyond the download.

Scorecard2 real differences · 4 level
Tarn. versus Period Tracker; Ovulation App: the parameters behind the verdict, then further details
ParameterTarn.Period Tracker; Ovulation App
PriceFreeFree
Update frequency—Weekly
AdsNo — betterYes
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.115.0 — better
Further details — not scored
Size42 MB81 MB
Age rating4+12+
Developersuite 110 llcMONAD SYSTEMS LTD

In-app purchases

None

Tarn.

No in-app purchases

2 purchases

Period Tracker; Ovulation App

Subscriptions2
  • Premium User - Weekly$2.997 Days
  • Premium User - Yearly$29.991 Year

Questions

Is Tarn. free?
Tarn. is free to download, with no in-app purchases.
Is Period Tracker; Ovulation App free?
Period Tracker; Ovulation App is free to download, with in-app purchases available.
Do Tarn. or Period Tracker; Ovulation App have ads?
Period Tracker; Ovulation App shows ads; Tarn. does not.

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