Comparison

Numbers, Dates vs Kakeizu

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

Head to head
About

Numbers, Dates

Features
Read full description

Discover what happened on any day in history. With Numbers, Dates, you can explore remarkable historical events, famous birthdays and notable deaths from around the world for any day of the year. Simply choose a day and month, select your preferred language, and the app retrieves historical information from freely available knowledge sources. The content is clearly organized into Events, Births, and Deaths for easy reading. Whether you're a history enthusiast, student, teacher, or simply curious, **Numbers, Dates** makes history accessible, educational and enjoyable. Features β€’ Select any day and month with an intuitive date picker β€’ Explore historical events from many centuries β€’ Discover famous birthdays of notable people β€’ Learn about important historical deaths β€’ Multilingual content (English, German, French, Spanish and many more) β€’ Clean and distraction-free interface β€’ Fast and easy to use β€’ Perfect for education, quizzes and daily learning β€’ Optimized for iPhone and iPad Every day has a story. Explore history, expand your knowledge and discover fascinating facts from every day of the year.

About

Kakeizu

Explore your family's history with a dynamic timeline and AI-powered ancestor stories. Create detailed family trees, manage important dates, and gain insights into family patterns. Export your data in various formats for safekeeping and sharing.

Highlights
  • Dynamic Time Machine for historical visualization
  • AI-powered ancestor story generation
  • Detailed family tree creation
  • Family insights and statistics
  • Event timeline and calendar management
  • Customizable anniversary reminders
  • Versatile export options (PDF, CSV, GEDCOM)
Features
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β—† A new kind of family tree app to experience your family's history across time! "Kakeizu: Family Tree Maker" is a full-fledged family tree app featuring a Time Machine and an AI Ancestor Generation function. Simply by moving the era slider, you can visually experience how your family's history has been woven together from the past to the present. β–Ό Time Machine Feature - Travel freely through time from the past to the present. - Animate the flow of time with the play button. - Choose from 5 playback speeds to suit your viewing style. - Automatically displays all Japanese eras from Taika (645 AD) to Reiwa. - Check historical events that happened in those years simultaneously. β–Ό AI Ancestor Generation - Based on a person in your family tree, AI automatically generates a historical story of your ancestors. - Select story themes such as "Turbulent life" or "Peaceful everyday life." - Set original themes using free text. - Try it once for free in the basic version! β–Ό Full-Fledged Family Tree Creation - Intuitively add parents, spouses, and children. - Record detailed info: phonetic readings, maiden names, occupations, and Chinese zodiac signs. - Add profile photos to put faces to names. - Freely adjust the layout with drag-and-drop. - Add family crests for a prestigious finish. β–Ό Family Insights - Longevity rankings and average lifespan statistics. - Analyze birth month distributions and peak months. - Visualize age gaps between generations (parents/children, siblings). - Discover trends and patterns in Kanji used in names. β–Ό Timeline - View family events (births, deaths) chronologically. - Overlap historical events with your family's journey. - Focus on specific individuals to relive their life stories. - Export to PDF. β–Ό Family Calendar - Centrally manage birthdays, death anniversaries, memorial services, and longevity celebrations. - Countdown display for upcoming events. - Automatically calculates longevity celebrations (60th, 70th, 77th, 88th, etc.). β–Ό Never Forget Important Anniversaries - Get notified of birthdays 1 week before, 1 day before, and on the day. - Reminders for death anniversaries and Buddhist memorial services (1st to 50th year). - Freely customize notification times. β–Ό Versatile Export & Sharing - Save as high-quality PNG images. - Export to PDF in A4, A3, or Letter size. - Bulk export data via CSV. - Ensure compatibility with other apps using the GEDCOM format. - Securely store precious data with JSON backups. β–Ό Designed for Japanese Culture - Fully supports all Japanese eras from Taika (645 AD) to Reiwa. - Automatically calculates and displays the Chinese zodiac. - Automatically calculates Buddhist memorial years. - Beautiful vertical writing layout. 【Free Version】 - Register up to 50 people and create up to 2 family trees. - Time Machine feature. - Auto-align function. - Birthday notifications. - Family Insights. - Personal/Family History Timeline. - 1 free AI Ancestor Generation. - PNG/PDF export (with watermark). 【Premium Plan (Unlimited Access)】 - Unlimited people registration and family tree creation. - Unlock all designs and fonts. - Notifications for death anniversaries and memorial services. - Family Calendar (birthdays, memorials, longevity celebrations). - 1 free AI Ancestor Generation per month. - CSV/GEDCOM import & export. - Full data backup. - Save images without watermarks. 【About the Premium Plan】 Period: 1 Month / 1 Year (Auto-renewal) (Detailed pricing is displayed in the app and varies by region) - Payment will be charged to your Apple ID account. - Auto-renewal can be canceled up to 24 hours before the end of the current period. - You can check, manage, and cancel your subscription in your App Store account settings. Terms of Service: https://notch-busby-4e6.notion.site/2f4ec62c0328804e8371eab6e28d207d Privacy Policy: https://notch-busby-4e6.notion.site/2f4ec62c0328804e8371eab6e28d207d#2f4ec62c032880e38f40d57c8ab87c91

Screenshots

Numbers, Dates4 screens
Kakeizu4 screens

Verdict

The call

The clearest difference is in-app purchases: Numbers, Dates at none against Kakeizu's 5. Kakeizu's advantage is update cadence (every 6 days vs every 5 months) and device support (4 vs 2). On price and ads there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Kakeizu sells 5 in-app purchases, starting at $3.99 per month. Numbers, Dates asks for nothing beyond the download.

UpkeepUpdate frequency

Numbers, Dates ships an update every 5 months, Kakeizu every 6 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

Scorecard4 real differences Β· 4 level
Numbers, Dates versus Kakeizu: the parameters behind the verdict, then further details
ParameterNumbers, DatesKakeizu
PriceFreeFree
Positive reviewsβ€”0.0% of reviews
Update frequencyEvery 5 monthsEvery 6 days β€” better
AdsNoNo
In-app purchasesNo β€” betterYes
Monetizationβ€”Freemium
DevicesiPhone, iPadiPhone, iPad, iPod, Mac β€” better
Requires iOS26.015.0 β€” better
Further details β€” not scored
Size7 MB66 MB
Age rating4+4+
DeveloperGerhard LentschikShogo Watanabe

In-app purchases

None

Numbers, Dates

No in-app purchases

5 purchases

Kakeizu

Subscriptions2
  • γƒ—γƒ¬γƒŸγ‚’γƒ γƒ—γƒ©γƒ³ (月鑍)$3.991 Month
  • γƒ—γƒ¬γƒŸγ‚’γƒ γƒ—γƒ©γƒ³ (年鑍)$39.991 Year
One-time3
  • AI Ancestor Credit (1 use)$0.99
  • AI Ancestor Credit (5 uses)$3.99
  • AI Ancestor Credit (10 uses)$7.99

Questions

Is Numbers, Dates free?
Numbers, Dates is free to download, with no in-app purchases.
Is Kakeizu free?
Kakeizu is free to download, with in-app purchases available.
Do Numbers, Dates or Kakeizu have ads?
Neither Numbers, Dates nor Kakeizu shows ads.
Which is updated more often, Numbers, Dates or Kakeizu?
Numbers, Dates ships an update every 5 months, and Kakeizu every 6 days. Most recently, Numbers, Dates was updated on October 30, 2026 and Kakeizu on October 31, 2026.

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