Comparison

Period Log vs Simple Caffeine Tracker

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

Head to head
About

Period Log

Track and predict your menstrual cycles, fertility, and ovulation. Log period days, flow, mood, symptoms, and more. Receive timely reminders and protect your data with password protection.

Highlights
  • Track period, ovulation, and fertile days
  • Predict future cycles and fertile windows
  • Log moods, symptoms, and flow
  • Visual calendar with icons
  • Customizable reminders
  • Password and Touch ID protection
  • Pregnancy mode with due date calculation
Features
Read full description

Period Log is designed for you to track and predict your fertility and menstrual cycles. With Period Log, you can track almost everything about your cycles, period days, cycle days, fertile days, ovulation day, flow, mood, symptom, intimate, spotting, breast self-exam, weight, temperature and notes. Period Log will make you life much easier. You can view details of your cycles at a glance, refer predicting periods to make well plans of date, private life, having baby, visiting doctor, and travel etc, doing something advance for important exam, match etc. Key Features: ⁃ Screen name is P. Log. ⁃ Track period, ovulation, fertile days, moods, weight and symptoms etc. ⁃ Predict following periods, ovulation and fertile days. ⁃ Two modules are provided to predict your periods, default days and average days. ⁃ Calendar design and icons to show your info visually. ⁃ Add or edit periods easily. ⁃ Receive reminder if periods is comings. ⁃ Receive reminder of breast self-exam. ⁃ Passwords to protect your info. ⁃ Supports Touch ID as passcode. ⁃ Help documents to help you how to use this app. ⁃ Pregnancy module is provided, calculates delivery date and days remains. ⁃ Support units of lbs and kg, °F and °C. ⁃ Supports Wifi backup and restore. ⁃ Supports Dropbox backup and restore. ⁃ Supports transferring data to Health app. ⁃ Supports universal version. ⁃ Supports Apple Watch version. Let’s your periods in control and prepare well when those days are coming, instead of being overwhelmed by her sudden visit. Please contact us by this email userfeed@vip.tom.com if you have any question or suggestion.

About

Simple Caffeine Tracker

Features
Read full description

Simple Caffeine Tracker - Know When You Can Sleep Track your caffeine. Sleep better. That simple. One tap to log your coffee, tea, or energy drink. Watch your caffeine level drop in real-time. Know exactly when you'll be ready to sleep. No complexity. Just clarity. • Add drinks in seconds • See your current caffeine level at a glance • Get your sleep-ready time instantly • 30-day history with daily stats • Visual charts to spot your patterns • Track daily average, streaks, and favorite drinks • Personalized for your body (weight & gender) The app calculates caffeine decay based on actual science - your half-life rate matters. It tells you when caffeine will clear your system, so you can plan your last coffee accordingly. Review your past month to understand your habits. See which days you went over your limit. Discover your daily average. Build better routines. Built for everyday use: Clean, minimal interface. No subscriptions. No accounts. No notifications spam. Just open, track, and know where you stand. Perfect for anyone who wants better sleep without giving up their daily coffee ritual.

Screenshots

Period Log4 screens
Simple Caffeine Tracker4 screens

Verdict

The call

The clearest difference is ads: Simple Caffeine Tracker at none against Period Log's shown. Simple Caffeine Tracker also leads on update cadence (every 2 days vs every 7 months). On price, in-app purchases, 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Period Log ships an update every 7 months, Simple Caffeine Tracker every 2 days. The most recent releases landed on November 1, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 8 level
Period Log versus Simple Caffeine Tracker: the parameters behind the verdict, then further details
ParameterPeriod LogSimple Caffeine Tracker
PriceFreeFree
Rating4.7 (1.2K ratings) — better—
Positive reviews91.9% of reviews—
Number of ratings1.2K — better—
Update frequencyEvery 7 monthsEvery 2 days — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad, iPod
Requires iOS15.615.1 — better
Further details — not scored
Size54 MB26 MB
Age rating4+4+
Developer倩 赵LUCAS GUFFROY

Bugs and requests

Period Log

Reported bugs

3 issues
  • Data not saving properly after app updates
  • Calendar view not displaying all entries correctly
  • Notifications not working as expected

Requested features

5 requests
  • Option to remove ads
  • Ability to sync data across devices
  • More detailed symptom and mood tracking
  • Customizable reminders and notifications
  • Integration with other health apps

Simple Caffeine Tracker

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Period Log

No in-app purchases

None

Simple Caffeine Tracker

No in-app purchases

Questions

Is Period Log free?
Period Log is free to download, with no in-app purchases.
Is Simple Caffeine Tracker free?
Simple Caffeine Tracker is free to download, with no in-app purchases.
Do Period Log or Simple Caffeine Tracker have ads?
Period Log shows ads; Simple Caffeine Tracker does not.
Which is updated more often, Period Log or Simple Caffeine Tracker?
Period Log ships an update every 7 months, and Simple Caffeine Tracker every 2 days. Most recently, Period Log was updated on November 1, 2026 and Simple Caffeine Tracker on October 25, 2026.

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