Comparison

NOLU vs Ovulation Calc & Fertile Days

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

Head to head
About

NOLU

This app helps expectant parents track their pregnancy week by week, manage checklists for hospital bags and baby essentials, and organize their newborn registry. It aims to simplify preparation for delivery and the arrival of a new baby.

Highlights
  • Week-by-week baby development tracking
  • Guided pregnancy checklists
  • Baby registry management
  • Hospital bag essentials checklist
  • Customizable to-do lists
  • Newborn preparation planning
Read full description

NOLU is a modern pregnancy app designed to keep everything clear, simple, and stress-free. Follow your baby’s development week by week, use guided pregnancy checklists, and manage your baby registry and hospital bag essentials with ease. Plan everything you need for your newborn, stay on top of important tasks, and feel confident as you approach delivery. NOLU helps you stay prepared with curated suggestions for baby essentials, while allowing you to create and customize your own lists. Personalize your experience based on your needs and build a system that works for you. From your first trimester to delivery day, NOLU supports you every step of the way. Privacy Policy: https://www.anjezadyrmishi.com/nolu-privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Ovulation Calc & Fertile Days

Features
Read full description

Find your most fertile days in seconds - just enter your last period date and cycle length. Ovulation Calc uses proven cycle-based methods to predict your ovulation date, fertile window, and next period. Whether you're trying to conceive or simply want to understand your cycle better, get clear answers without handing over your personal health data. KEY FEATURES: * Fertile Window Prediction - See your 6-day fertile window and peak ovulation day based on your unique cycle length * 3-Month Calendar View - Color-coded calendar shows period, fertile, and ovulation days at a glance * Flexible Cycle Length - Adjustable slider supports cycles from 21 to 45 days * Current Cycle Day - Always know where you are in your cycle today * Next Period Date - Plan ahead with your predicted next period start date DESIGNED WITH PRIVACY IN MIND: No account required. No data leaves your phone. No cloud sync, no social features, no tracking. Just a simple, offline calculator that respects your privacy. Free to download. Works offline. No sign-up required. IMPORTANT: This app is not medical advice. It is for educational and informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Ovulation predictions are estimates based on average cycle data. Always consult a healthcare provider for fertility and reproductive health decisions. By Blas Apps - simple calculators that do one thing perfectly.

Screenshots

NOLU4 screens
Ovulation Calc & Fertile Days4 screens

Verdict

The call

The clearest difference is in-app purchases: Ovulation Calc & Fertile Days at none against NOLU's 3. Ovulation Calc & Fertile Days also leads on update cadence (daily vs every 6 days). On price, ads, 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. NOLU sells 3 in-app purchases, starting at $6.99 per month. Ovulation Calc & Fertile Days asks for nothing beyond the download.

UpkeepUpdate frequency

NOLU ships an update every 6 days, Ovulation Calc & Fertile Days daily. The most recent releases landed on September 21, 2026 and September 18, 2026 respectively.

Scorecard2 real differences · 8 level
NOLU versus Ovulation Calc & Fertile Days: the parameters behind the verdict, then further details
ParameterNOLUOvulation Calc & Fertile Days
PriceFreeFree
Rating5.0 (19 ratings) — better
Positive reviews100.0% of reviews
Number of ratings19 — better
Update frequencyEvery 6 daysDaily — better
AdsYesYes
In-app purchasesYesNo — better
MonetizationFreemium
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS14.0.0 — better15.1
Further details — not scored
Size56 MB25 MB
Age rating4+4+
DeveloperAjna Group LLCBlas Prieto

In-app purchases

3 purchases

NOLU

Subscriptions3
  • NOLU Premium — Monthly$6.991 Month
  • NOLU Premium — 3 Months$14.993 Months
  • NOLU Premium — Yearly3 Days trial$39.991 Year
None

Ovulation Calc & Fertile Days

No in-app purchases

Questions

Is NOLU free?
NOLU is free to download, with in-app purchases available.
Is Ovulation Calc & Fertile Days free?
Ovulation Calc & Fertile Days is free to download, with no in-app purchases.
Do NOLU or Ovulation Calc & Fertile Days have ads?
Both NOLU and Ovulation Calc & Fertile Days show ads.
Which is updated more often, NOLU or Ovulation Calc & Fertile Days?
NOLU ships an update every 6 days, and Ovulation Calc & Fertile Days daily. Most recently, NOLU was updated on September 21, 2026 and Ovulation Calc & Fertile Days on September 18, 2026.

Other comparisons