# BatteryPhone vs ParallelCalculator

The clearest difference is in-app purchases: BatteryPhone at none against ParallelCalculator's 2. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. ParallelCalculator sells 2 in-app purchases, starting at $1.99 per month. BatteryPhone asks for nothing beyond the download.

## The numbers

| Metric | BatteryPhone | ParallelCalculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (156 ratings)](https://appshunter.io/ios/app/batteryphone/id1191334332/reviews)** | — |
| Number of ratings | **156** | — |
| Positive reviews | 53.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | — |
| Monetization | Ad-supported | — |
| Size | 7 MB | 38 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Keietsu Yasuhara](https://appshunter.io/developer/378538320) | [Ryusei Wakita](https://appshunter.io/developer/1896649944) |

## 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


### ParallelCalculator

[App page](https://appshunter.io/ios/app/parallelcalculator/id6769945397)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアム 月額プラン | $1.99 | per month |
| プレミアム 年額プラン | $19.99 | per year |


## Frequently asked questions

### Is BatteryPhone free?

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

### Is ParallelCalculator free?

ParallelCalculator is free to download, with in-app purchases available.

### Do BatteryPhone or ParallelCalculator have ads?

Both BatteryPhone and ParallelCalculator show ads.

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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.*