何日経った? vs DaysKeeper
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
何日経った?
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登録した出来事から何日経過したかを可視化するシンプルなアプリです。 【機能・特徴】 ・イベント名とアイコンで出来事を追加できます ・経過日数が表示されます ・イベント右上のアイコンをタップすると、編集・削除・経過時間のリセットができます
DaysKeeper
Track days past and days remaining until important dates. Add photos, notes, and colors to your events. Receive notifications for upcoming anniversaries and milestones.
- Track days past and remaining
- Attach photos and notes to dates
- Customizable colors and tags
- Calendar and reminder integration
- Sortable date list
- Customizable notifications
- iCloud device sync
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This is an app that displays the number of days that have passed since a certain date and the number of days remaining until a certain date. By registering dates of interest, such as anniversaries or events, you can easily check the number of days from that date. --------------- # Date --------------- Example of a date Birthday Anniversary Planned travel date Car purchase date The day I started keeping a pet The day I sowed the flower seeds Historical date You can attach photos and notes to a certain date, and set colors and tags to make it easier to find. It also supports dark mode. You can add it to your calendar and reminders so you don't forget important dates. --------------- # Days --------------- Since you can freely set the base date, you can list the number of days other than today. You can also always display today at the top of the date list. You can sort the display order by date, number of days, or name. Since you can freely set the number of days, it is useful to find out the date of the day that has passed from a certain date. --------------- # Notification --------------- You can set notifications for the same day or the day before a certain date. You can set notifications for the number of days you have registered or for a number of well-defined days. (Premium feature) --------------- # Others --------------- You can sync with multiple devices with iCloud. --------------- # About subscriptions and paid features --------------- Please refer to the following for the terms and conditions for using subscriptions and paid functions. 1. Privacy Policy: https://gsoft.jp/privacypolicy/ 2. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: 何日経った? at none against DaysKeeper's 4. 何日経った? also leads on ads (none vs shown). DaysKeeper's advantage is update cadence (every 4 weeks vs every 16 months). On price, device support and iOS requirement 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. DaysKeeper sells 4 in-app purchases, starting at $0.99 per month. 何日経った? asks for nothing beyond the download.
何日経った? ships an update every 16 months, DaysKeeper every 4 weeks. The most recent releases landed on October 12, 2026 and October 18, 2026 respectively.
| Parameter | 何日経った? | DaysKeeper |
|---|---|---|
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| Update frequency | Every 16 months | Every 4 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 17.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | KAZUKI KUBO | G-SOFT |
In-app purchases
何日経った?
No in-app purchases
DaysKeeper
- Hide ads$0.991 Month
- Notification by number of days$0.99
- Number of Date-Data$2.99
- Hide ads (Unlimited)$5.99








