ポケット手帳 vs World Time Calc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ポケット手帳
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ポケットに入れられる手帳です。
World Time Calc
Visualize day/night cycles and working hours across different cities with an interactive timeline. Receive custom notifications for sunrise and sunset. Manually adjust work hours for precise scheduling.
- Day/night and working hour graphs
- Automatic time updates
- Manual work hour adjustment
- Interactive time cursor
- Sunrise/sunset alarm notifications
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・Features of the WorldTimeCalc ・Graph of day/night and working hours in each city. - Day and night time will be updated automatically every day. Working hours can be changed manually for each city. ・By sliding the cursor, the time for each city will change in the list. ・In normal times, the cursor points to the current time in real time, so you can see at a glance whether it is daytime, nighttime, during business hours, or outside in each city. ・You can send alarm notifications for sunrise, sunset, start time, and end time.
Screenshots
Verdict
The clearest difference is in-app purchases: ポケット手帳 at none against World Time Calc's 1. ポケット手帳 also leads on ads (none vs shown) and update cadence (weekly vs every 6 weeks). 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. World Time Calc sells 1 one-off in-app purchase. ポケット手帳 asks for nothing beyond the download.
ポケット手帳 ships an update weekly, World Time Calc every 6 weeks. The most recent releases landed on October 19, 2026 and October 23, 2026 respectively.
| Parameter | ポケット手帳 | World Time Calc |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 66.7% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Weekly — better | Every 6 weeks |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | — | Ad-supported |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 16.0 | 16.0 |
| Further details — not scored | ||
| Size | 21 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Kento Takise | Hajime Suzuki |
In-app purchases
ポケット手帳
No in-app purchases
World Time Calc
- PremiumPlan$7.99
