One Good Deed – Kindness Diary
KOHEI MITSUI Lifestyle iPhoneiPadiPod touch
One Good Deed – Kindness Diary is a free Lifestyle app for iPhone and iPad by KOHEI MITSUI. Requires iOS 18.0. Updated September 11, 2026.
- Price
- Free
- on the App Store
- Size
- 44 MB
- Age 4+
- Updated
- Sep 11
- 2026 · v1.0.1
Screenshots
About One Good Deed – Kindness Diary
One Good Deed is a diary for one small kind thing a day — and only one. You gave up your seat. You picked up a piece of litter. You said a real thank-you. Small things are exactly the ones you forget if you don't write them down. ■ One a day, thirty seconds You can only write today's entry, and only up to 100 characters, so you finish before you can overthink it. Add hashtags and you can look back later at what kind of good things you did most. ■ A mark lights up your calendar Every day you write lights a mark. The further the month goes, the fuller your calendar gets. The mark follows your palette: cherry blossom in spring, new leaves in summer, autumn leaves in autumn, snow in winter. (Choosing among the four, and having it follow the season automatically, are part of Pro.) ■ Your streak stays with you Current and longest streaks and your all-time total are counted for you. Three days, seven, fourteen — reach a milestone and the app celebrates with you. ■ Recap The month's count and your current, longest, and all-time figures are free. The breakdown by hashtag, your streak milestones, and every past month are part of Pro. ■ For the days nothing comes to mind Pick from 30 suggestions. The one you choose fills in the entry and adds a category tag. ■ Also - One optional reminder a day, at a time you choose (free) - Choose your palette (and the calendar mark that goes with it) from the four seasons, or have it follow the season automatically — both are part of Pro - Export and import your entries as JSON (Pro) - Japanese and English ■ Privacy The text of your entries and your hashtags are stored only on your device and are never sent to a server. No account is required. There are no ads. The app does send anonymous usage statistics to help us improve it: which features were used, along with a few setting values such as the fact that you turned the reminder on and the time you set it to. It never includes the text of your entries or the content of your hashtags. ■ About One Good Deed Pro Writing your entry, reading back any past day from the calendar, the daily reminder, and sharing an entry are all free. Nothing you need in order to keep the habit is behind the paywall. Pro unlocks five things: - The whole recap (breakdown by hashtag, streak milestones, and every past month) - Unlimited hashtags (the free plan allows three) - Seasonal palettes and app icons to choose from (or set to follow the season) - Dark mode - Export and import your entries as JSON - Available as a monthly or a yearly subscription. Your local price is shown in the app before you purchase, and in the In-App Purchases section of this page. - Payment is charged to your Apple ID account at confirmation of purchase. - Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period. - Your account is charged for renewal within 24 hours prior to the end of the current period. - You can manage and cancel your subscription in Settings > Apple ID > Subscriptions on your iPhone. - Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ - Privacy Policy: https://tempuraapps.github.io/ichinichiichizen/en/privacy.html
What’s new
Version 1.0.1 · Updated September 11, 2026
You can now turn on the nightly reminder in two places: during the welcome screens, and just after you write an entry. • Declining is fine — the app works exactly the same • The time and the on/off switch can be changed any time in Settings
App privacy
The developer, KOHEI MITSUI, reported these privacy practices to Apple.
Data Not Linked to You
The following data, which may be collected but is not linked to your identity, may be used for the following purposes:
- Purchases: Purchase History
- Identifiers: User ID
- Usage Data: Product Interaction, Other Usage Data
Used for: Analytics, App Functionality
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