# BatteryPhone vs Kantan Clock

The clearest difference is price: BatteryPhone at Free against Kantan Clock's $0.99. BatteryPhone also leads on ratings volume (156 vs 1). Kantan Clock's advantage is rating (5.0 vs 3.6) and ads (none vs shown). On in-app purchases, device support and iOS requirement there is nothing between them.

BatteryPhone is free to download; Kantan Clock costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Kantan Clock holds the better App Store score, 5.0 against 3.6. That said, the two scores are not equally well evidenced: BatteryPhone has 156 ratings behind it against 1, so its average is the more settled of the two.

BatteryPhone ships an update every 2 months, Kantan Clock every 4 days. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | BatteryPhone | Kantan Clock |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [3.6 (156 ratings)](https://appshunter.io/ios/app/batteryphone/id1191334332/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/kantan-clock/id6752209146/reviews)** |
| Number of ratings | **156** | 1 |
| Positive reviews | 53.7% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 4 days** |
| Monetization | **Ad-supported** | Paid |
| Size | 7 MB | 1 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Keietsu Yasuhara](https://appshunter.io/developer/378538320) | [Andres Iga Salas](https://appshunter.io/developer/1834643857) |

## What reviewers say

### BatteryPhone

[App page](https://appshunter.io/ios/app/batteryphone/id1191334332)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🚀 Convenient way to check battery levels
- 💡 Helpful complication options
- 🔋 Minimal battery drain

**What reviewers complain about**

- 🐛 Inconsistent updates
- 🐛 Inaccurate battery readings
- 🔋 High battery consumption
- 🐛 Compatibility issues with newer devices/OS

**Reported bugs**

- Complication not updating
- App crashing on launch
- Incorrect battery percentage displayed

**Requested features**

- 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


### Kantan Clock

[App page](https://appshunter.io/ios/app/kantan-clock/id6752209146)

Track time across multiple cities with a clean, minimalist world clock. Organize your most important locations and view times at a glance with a home screen widget. Supports StandBy mode for easy viewing.

**Highlights:** Add and organize cities, 12/24 hour format switching, Clean, minimal interface, Home Screen widget, StandBy mode support

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BatteryPhone free?

BatteryPhone is free to download, with no in-app purchases.

### Is Kantan Clock free?

Kantan Clock costs $0.99, with no in-app purchases.

### Which has better reviews, BatteryPhone or Kantan Clock?

Kantan Clock is rated higher. BatteryPhone averages 3.6 out of 5 from 156 ratings, while Kantan Clock averages 5.0 from 1 ratings.

### Do BatteryPhone or Kantan Clock have ads?

BatteryPhone shows ads; Kantan Clock does not.

### Which is updated more often, BatteryPhone or Kantan Clock?

BatteryPhone ships an update every 2 months, and Kantan Clock every 4 days. Most recently, BatteryPhone was updated on October 24, 2026 and Kantan Clock on October 20, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*