Kyokun vs CommNote
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Kyokun
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When a mistake at work or in everyday life stays on your mind, use Kyokun to record what happened and the lesson you want to remember. Write one part at a time: roughly when it happened, what happened, how you felt, and what you learned. You can add a possible cause and a next action, plus a photo or voice note for context. If it happens again, add another occurrence to the same lesson. Review the count and the individual entries instead of losing them across separate diary pages. On the Mountain Range Home screen, each lesson's mountain grows with its repeat count. Pin lessons you want to revisit. Search and filter your records, or place a lesson on your Home Screen with a widget. Recording and reviewing lessons are available free with ads. An optional one-time purchase removes ads. This is a place to reflect on your own experiences; it does not promise to prevent mistakes. Privacy Policy: https://kazusa703.github.io/privacy.html Terms of Use: https://kazusa703.github.io/terms.html Support: https://kazusa703.github.io/support.html
CommNote
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“We’re out of soap.” “Wait — did I tell you?” The little things are easy to forget. On their own they’re nothing, but they add up — and slowly you drift. CommNote was made to take those tiny misunderstandings away. It started as a chat group my partner and I made while living together, named “renrakucho.” We jotted shopping and reminders there — but in chat, everything just scrolls away. We wanted a place where it stays. So we built one, and kept the name. A shared notebook for the people closest to you — your partner, family, or roommates. Your shopping, your little agreements, your money — all in one place. ■ Three tabs that quietly have your back • Lists — never lose “can you grab milk?” again. Jot it and it appears on their screen; check it off when it’s done. Assign it, and “who’s doing this?” disappears. Pin the important ones. • Rules — “we take turns with the trash,” “quiet after 10pm.” Turn vague promises into something you can both see. • Money — “how much did we spend this month?” at a glance. Log who paid, tap “Split up,” and who-owes-whom is worked out for you — no more awkward money talk. Rent and subscriptions sit in fixed costs and total themselves. ■ Start with just your name No sign-up, no email, no password. Send a 6-digit code and you’re connected. ■ Notice without checking A gentle nudge when the other person adds, finishes, or logs something (never for your own actions). ■ Show it to people without the app Want to show the shopping list to family back home? Send a read-only link — no app, no sign-up for them. ■ For everyday life — and the occasional get-together • Couples just starting to live together; busy two-income households sharing chores • Staying in touch with family far away • Hosting a trip, BBQ, or party — assign the potluck (meat → Alex, drinks → Sam), and “Split up” the bill. Up to 10 people free (50 with Premium). ■ CommNote Premium (optional) For getting more from Money. ¥490/month or ¥4,900/year, 7-day free trial. Monthly report, categories, full history, custom split (60/40), up to 50 members & no ads. The basics (sharing, rules, expense log, Split up, fixed costs) stay free, always. For the people closest to you — and a day with nothing left unsaid. ■ Subscription terms CommNote Premium — ¥490/month or ¥4,900/year (7-day free trial). Auto-renewable subscription. Payment is charged to your Apple ID at confirmation of purchase. The subscription renews automatically unless canceled at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours before the period ends. Manage or cancel anytime in your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://negtak.github.io/renrakucho/privacy-policy.html
Screenshots
Verdict
The clearest difference is ads: CommNote at none against Kyokun's shown. CommNote also leads on update cadence (every 3 days vs every 4 weeks) and device support (3 vs 1). On price and in-app purchases 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. Kyokun sells 1 one-off in-app purchase and CommNote sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
Kyokun ships an update every 4 weeks, CommNote every 3 days. The most recent releases landed on October 31, 2026 and November 10, 2026 respectively.
| Parameter | Kyokun | CommNote |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 weeks | Every 3 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 26.2 | 13.0 — better |
| Further details — not scored | ||
| Size | 43 MB | 90 MB |
| Age rating | 4+ | 4+ |
| Developer | atsuko imai | Gen Takagaki |
In-app purchases
Kyokun
- Remove Ads & Unlock All$4.99
CommNote
- CommNote Premium(Monthly)7 Days trial$2.991 Month
- CommNote Premium(Yearly)7 Days trial$29.991 Year









