Comparison

KeepDates vs Kizuna

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

Head to head
About

KeepDates

Features
Read full description

Your iPhone remembers birthdays. But important dates like anniversaries are easy to miss. KeepDates fixes that automatically. # What it does KeepDates finds the dates stored in your contacts: anniversaries, custom events, and more. It turns them into reminders you’ll actually see. It works quietly in the background and keeps everything up to date as your contacts change. # Why it’s useful * Never forget anniversaries, milestones, or important personal dates * See all upcoming dates in one simple list * Get reminders before they happen * Works automatically, with no manual setup # How it works * Scans your contacts for date fields * Lets you review and choose what to include * Syncs selected dates into a dedicated calendar * Keeps everything updated in the background # Key Features * Automatic contact date detection * Calendar sync with yearly recurring events * Optional reminders (day before by default) * Widgets for quick access to upcoming dates * Background sync, so it is always up to date * Works completely offline # Widgets * Small widget: next upcoming date * Medium widget: multiple upcoming dates * Lock screen widget: quick glance countdown # Privacy KeepDates is built to be simple and private: * No accounts * No cloud sync * No tracking * All data stays on your device # Premium (Optional) Unlock additional control and customization: * Smart reminders (multiple timings) * More events in widgets + large widget * Look-ahead window control * Pinned contacts * Advanced filtering and customization ### KeepDates is designed to feel like a missing system feature: simple, automatic, and out of the way.

About

Kizuna

Features
Read full description

Kizuna helps you decide, in seconds, whether today is a good day to visit a client, send a gift, or travel in Japan. Built for people who work, live, or travel between cultures - clear answers, no fluff, and no missed public holidays. WHAT KIZUNA DOES 1. Today view: one card that tells you if today is a national holiday, a long weekend, or a sensitive etiquette window - now with a weather-aware context for your day. 2. Full Japan holiday calendar with month-by-year browsing and long-weekend highlights. 3. Scenario advice for client visits, gift giving, return gifts, and business trips - each with the reason and better alternative dates. 4. Culture-aware etiquette cards written from a Japanese point of view, not machine-translated fluff. 5. Smart reminders before Golden Week, Obon, Oseibo, Ochugen, and other moments that shape the year. WHY PEOPLE CHOOSE KIZUNA - You don't need a calendar. You need a decision. - No more scheduling a meeting the day before a public holiday and looking careless. - Send omiyage or okaeshi at the right time - not too early, not too late. - Works offline, so it still answers when you are roaming in Japan. BUILT FOR - Business travelers and expats who work with Japanese clients. - Foreign residents in Tokyo, Osaka, Yokohama, Nagoya, and beyond. - Culturally curious travelers who want to blend in. DESIGNED WITH RESPECT - Native iOS experience with Dark Mode, Dynamic Type, and VoiceOver. - Fast, quiet, and private. Your data stays on your device. - A one-time purchase unlocks the full etiquette library. An optional Pro subscription adds advanced reminders and shareable cards. No ads. FREE - Today summary and weather context - Basic holiday calendar - Limited scenario advice UNLOCK MORE - Full etiquette library - Advanced reminders and Pro status sync - Shareable holiday and etiquette cards FEEDBACK - A built-in feedback entry lets you email the developer directly from the app. We read every note. Questions or feedback? babong@qq.com. Apple Standard End User License Agreement (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

KeepDates4 screens
Kizuna4 screens

Verdict

The call

The clearest difference is update cadence: KeepDates at every 9 days against Kizuna's every 5 weeks. Kizuna's advantage is iOS requirement (16.6 vs 26.0). On price, ads, in-app purchases 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. KeepDates sells 1 one-off in-app purchase and Kizuna sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

KeepDates ships an update every 9 days, Kizuna every 5 weeks. The most recent releases landed on October 7, 2026 and October 11, 2026 respectively.

Scorecard2 real differences · 4 level
KeepDates versus Kizuna: the parameters behind the verdict, then further details
ParameterKeepDatesKizuna
PriceFreeFree
Update frequencyEvery 9 days — betterEvery 5 weeks
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, Apple WatchiPhone, iPad
Requires iOS26.016.6 — better
Further details — not scored
Size12 MB24 MB
Age rating4+12+
DeveloperZiga Dolar发亮 刘

In-app purchases

1 purchases

KeepDates

One-time1
  • Premium Unlock$3.99
3 purchases

Kizuna

Subscriptions2
  • Kizuna Premium (Monthly)$1.991 Month
  • Kizuna Premium (Annual)$5.991 Year
One-time1
  • Lifetime Premium$8.99

Questions

Is KeepDates free?
KeepDates is free to download, with in-app purchases available.
Is Kizuna free?
Kizuna is free to download, with in-app purchases available.
Do KeepDates or Kizuna have ads?
Neither KeepDates nor Kizuna shows ads.
Which is updated more often, KeepDates or Kizuna?
KeepDates ships an update every 9 days, and Kizuna every 5 weeks. Most recently, KeepDates was updated on October 7, 2026 and Kizuna on October 11, 2026.

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