BatteryPhone vs World Clock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BatteryPhone
Monitor your phone and watch battery levels directly from your wrist. Receive timely notifications for low or full charge status, and view historical battery data with convenient graph displays. Supports automatic updates via complications for seamless monitoring.
- Check phone and watch battery status
- Receive low and full charge notifications
- View battery level graphs
- Complication support for automatic updates
- Tap complication to manually update status
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You can check the battery status of your phone and watch with your watch. Compatible with complications (automatic update). You can check the charging amount and charging status of the phone in a timely manner from the clock face. We will notify you by a notification when the charge amount of the phone or watch becomes less than the specified% or becomes full charge. The graph also displays the change in charge level for your phone and watch. - Set up complications with the watch app on your watch or phone. - The battery status displayed in the complication is automatically updated approximately every 12 to 60 minutes. The reason why the update interval has a range is that it depends on Watch OS. If the automatic update has stopped (for example, there is no update for more than 1.5 hour), tap the complication to restart it. In the iPhone app, the latest update time is displayed under the watch's charge status display. - Tap the complication to update to the latest status. - A circular complication can be assigned to the outer circle and the inner number to indicate the battery level of the phone and watch, respectively. -- I am a Japanese developer. The support site can be translated into various languages with the "Translate" option on the right side of the site.
World Clock
Easily check the current time, sunrise, and sunset in multiple cities worldwide. Compare time zones and add complications to your watch face for quick access.
- Global time checking
- Sunrise and sunset times
- Customizable city lists
- Watch face complications
- Time zone comparison
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With World Clock, you can quickly check the time in cities around the globe. Features: - Add cities of your choice to view the current, sunrise and sunset times - Quickly scroll through cities added to your list to see information about the city. - Add World Clock as a watch face complication to glance at the time in the city of your choice. - Easily compare times with a different time zone from your city list.
Screenshots
Verdict
The clearest difference is rating: World Clock at 4.4 against BatteryPhone's 3.6. World Clock also leads on ads (none vs shown) and monetization model (free vs ad-supported). BatteryPhone's advantage is update cadence (every 2 months vs every 6 months) and ratings volume (156 vs 8). On price, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
World Clock holds the better App Store score, 4.4 against 3.6. That said, the two scores are not equally well evidenced: BatteryPhone has 156 ratings behind it against 8, so its average is the more settled of the two.
BatteryPhone ships an update every 2 months, World Clock every 6 months. The most recent releases landed on October 20, 2026 and September 18, 2026 respectively.
| Parameter | BatteryPhone | World Clock |
|---|---|---|
| Price | Free | Free |
| Rating | 3.6 (156 ratings) | 4.4 (8 ratings) — better |
| Positive reviews | 53.7% of reviews | — |
| Number of ratings | 156 — better | 8 |
| Update frequency | Every 2 months — better | Every 6 months |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPod, Apple Watch |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Keietsu Yasuhara | Apple |
Customer experience
BatteryPhone
World Clock
Bugs and requests
BatteryPhone
Reported bugs
3 issues- Complication not updating
- App crashing on launch
- Incorrect battery percentage displayed
Requested features
4 requests- Customizable update frequency
- Support for AirPods/Bluetooth device battery monitoring
- Notification when device is fully charged
- Ability to select which device's battery is displayed on complication
World Clock
Not enough reviews yet to summarise bugs or requests.
In-app purchases
BatteryPhone
No in-app purchases
World Clock
No in-app purchases
Questions
Is BatteryPhone free?
Is World Clock free?
Which has better reviews, BatteryPhone or World Clock?
Do BatteryPhone or World Clock have ads?
Which is updated more often, BatteryPhone or World Clock?
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