KeepDates vs Kizuna
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KeepDates
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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.
Kizuna
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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
Verdict
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
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.
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.
| Parameter | KeepDates | Kizuna |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 9 days — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Requires iOS | 26.0 | 16.6 — better |
| Further details — not scored | ||
| Size | 12 MB | 24 MB |
| Age rating | 4+ | 12+ |
| Developer | Ziga Dolar | 发亮 刘 |
In-app purchases
KeepDates
- Premium Unlock$3.99
Kizuna
- Kizuna Premium (Monthly)$1.991 Month
- Kizuna Premium (Annual)$5.991 Year
- Lifetime Premium$8.99









