World Time Calc vs QuickCountdown
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
QuickCountdown
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-1. Choose the countdown time -2. Click start to start the countdown -3. Background sound effects can be turned on and off -4. It is possible to quickly turn on and off the alarm clock after the countdown ends
Screenshots
Verdict
The clearest difference is in-app purchases: QuickCountdown at none against World Time Calc's 1. QuickCountdown also leads on ads (none vs shown) and iOS requirement (12.0 vs 16.0). On price, update cadence 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. World Time Calc sells 1 one-off in-app purchase. QuickCountdown asks for nothing beyond the download.
World Time Calc ships an update every 6 weeks, QuickCountdown every 2 months. The most recent releases landed on November 4, 2026 and November 8, 2026 respectively.
| Parameter | World Time Calc | QuickCountdown |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 66.7% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 6 weeks — better | Every 2 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 10 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | Hajime Suzuki | 单 安 |
In-app purchases
World Time Calc
- PremiumPlan$7.99
QuickCountdown
No in-app purchases
