# Battery Monitor App — Simple. Accurate. Precise.

> Accurate battery life and charging time monitoring with a simple interface and widget. (iPhone/iPad app by Wern Jie Lim.)

- Source: https://appshunter.io/ios/app/battery-monitor-app/id1182374760 (this page in markdown: same URL + `.md`)
- Developer: [Wern Jie Lim](https://appshunter.io/developer/1032934247)
- Category: Utilities
- Price: Free
- Rating: 4.29/5 from 45 App Store ratings · 20 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.0 · 15 MB
- Languages: English
- Released: 2016-12-09
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/battery-monitor-app/id1182374760/reviews.md

## What is Battery Monitor App?

Battery Monitor, the most accurate battery life monitoring app on the App Store. With its simple battery life calibration, you can get estimations with down-to-the-minute accuracy* (±1min), plus with accurate decimal point precision while charging your phone (e.g. "82.7%")**! It also have a handy widget to access estimations anywhere.

This app contains calibration for battery usage, battery charging time and much more, making it one of the most accurate on the App Store! Plus, you get to view your battery level with higher precision than ever before. Don't download those clones you find everywhere, download this FREE app now, with absolutely no ads!

Features:
• ±1 min battery life accuracy*
• ±1 min charging time accuracy*
• Simple interface, easy to use
• iOS Widget for easy access
• Decimal point precision for battery level when charging (e.g. "82.7%")**
• One time battery calibration
• No Ads, completely free

Download and enjoy! :)

----------

Hi, I'm Wern Jie (15), the individual developer behind this app. Hope you enjoy the app! If you have any problems, feel free to contact me at lwjdev@gmail.com.

----------

FAQ:
*Accuracy is based on a perfectly calibrated device, which is required for high accuracy. Your device's accuracy may vary. 

*Estimated values may sometimes progress up and down, but usually the first estimated value is the most accurate amount.

*Battery life time remaining means how long you can use your phone continuously, unless specified in calibration settings.

**Decimal point battery level precision is currently only available after charging for approximately more than 1-2 minutes.

More info at https://www.wernjie.com/battery-monitor

## Key features

- ±1 min battery life accuracy
- ±1 min charging time accuracy
- Simple and easy-to-use interface
- iOS Widget for quick access
- Decimal point precision for charging battery level
- One-time battery calibration
- Completely free with no ads

## Recent user reviews (10 of 20)

All indexed reviews: https://appshunter.io/ios/app/battery-monitor-app/id1182374760/reviews.md

### 5/5 — Get This App!!

*2022-06-28, version 1.2*

I’m not even joking if you want an app that saves your battery 🔋 tells you when it will die and when to unplug get this app it is so helpful my phone use to die so fast but after I downloaded this app it tell you what time you have left on it and the you don’t have to put your phone on low battery mode anymore!

### 5/5 — Brings the features that Apple should've had

*2022-02-04, version 1.2*

This is the perfect battery monitor app because it shows fractional battery percentage while charging, which Apple doesn't show anywhere. It saves me a lot of time from checking whether my phone is actually charging.

It even has a dim black screensaver mode so I can see the battery percentage clearly at all times, whether charging or not.

### 5/5 — Insanely accurate

*2021-03-07, version 1.2*

If you have a worn out battery, you’ll need to calibrate the app before it gets to the perfect accuracy, but it’s awesome. And free too!

### 5/5 — Please keep updating

*2021-02-26, version 1.2*

This is the only app that means my needs for charging. I love this app so much please keep updating it

### 3/5 — Not very accurate for me.

*2021-02-09, version 1.2*

I tried to calibrate the app but it didn’t work and it still seems like the accuracy is very off.

### 5/5 — Nicely done

*2020-12-22, version 1.2*

Have tried a number of battery apps. This is the simplest and best looking.

### 5/5 — Phone charger app

*2020-11-24, version 1.2*

This app is awesome thanks

### 3/5 — Decent I guess

*2020-07-21, version 1.2*

So I got this yesterday and it hasn’t been right on how long it would last every time last night I was using it it was saying it would last 7 hours then I went to sleep it said it would last 5 hours I’ve been using it for an hour and it says it will die in 53 minutes :/

**Developer response:** Hi there,

Thank you for your feedback. Just to confirm, have you performed calibration within the app yet? It is necessary to do that to get accurate readings.

- Wern Jie

### 4/5 — Not really that helpful…

*2020-07-05, version 1.2*

It basically tells you how much battery you have. It can say an estimation of how much time you have left but other than that, I don’t get the point of it. I can basically just see how much battery I have left. I want more info on my battery 🔋 🔋🔋

**Developer response:** Hi there,

The app's primary purpose is to provide a significantly more precise estimation of your battery life after calibration, even up to +/-1 minute of accuracy, which is not information you can currently get from other apps or the system.

The app also displays a decimal place after charging and leaving the app open for a few minutes - 72.5% instead of 72% for instance - which is a helpful way to see that your phone is topping up its battery, and visualise how fast your phone is charging.

Hope that helps! :)

- Wern Jie

### 5/5 — Perfect

*2020-04-25, version 1.2*

Don’t usually write reviews but it’s accurate and on point. I love how it’s on widgets. I hope there will be more and better updates to come. Simple and easy!!!

## Frequently asked questions about Battery Monitor App

### What is the accuracy of Battery Monitor App?

Battery Monitor App offers estimations with down-to-the-minute accuracy (±1min) for both battery life and charging time, based on a perfectly calibrated device. Your device's accuracy may vary.

### Is Battery Monitor App free to use?

Yes, Battery Monitor App is completely free to download and use, with absolutely no advertisements included.

### What devices does Battery Monitor App support?

Battery Monitor App is available for iPhone, iPad, and iPod devices.

### How precise is the battery level display when charging?

The app provides decimal point precision for battery levels while charging, such as '82.7%', which is available after charging for approximately 1-2 minutes.

### Can I access battery estimations easily with Battery Monitor App?

Yes, the app includes a handy iOS Widget that allows for easy access to battery estimations from anywhere on your device.

### What is the age rating for Battery Monitor App?

Battery Monitor App has an age rating of 4+, making it suitable for a wide range of users.

### How often is Battery Monitor App updated?

The latest version available is 1.2, which was last updated on June 15, 2019. Further update frequency information is not provided.

### What does 'battery life time remaining' mean in Battery Monitor App?

'Battery life time remaining' indicates how long you can continuously use your phone, unless specific calibration settings are applied.

## Version history (last 1 release)

### 1.2 — 2019-06-15

- The app can now display decimal places while charging (i.e. "72.5%" will be shown instead of "72%") within the app, as long as you give a few minutes for the charging to ramp up to full speed at a stable rate.
- New screensaver mode which shows the battery level and current time at a low brightness. Ideal for situations where you need to quickly monitor your phone's battery level while charging, with the new decimal place precision.
- Added support for all new iPad and iPhone models.
- Fixed an issue regarding the calculation of the hour and minute counter.

Enjoy! :)

## Apps similar to Battery Monitor App

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Battery Life Health Doctor Pro](https://appshunter.io/ios/app/battery-life-health-doctor-pro/id1180887748) | 4.4 (7,719) | Free | Utilities |
| [Battery Level](https://appshunter.io/ios/app/battery-level/id319724829) | 4.7 (927) | Free | Utilities |
| [Battery Care Alarm](https://appshunter.io/ios/app/battery-care-alarm/id1510510179) | 4.3 (373) | Free | Utilities |
| [Battery HD+](https://appshunter.io/ios/app/battery-hd-plus/id331453283) | 4.5 (2,596) | Free | Utilities |
| [Battery Saver - Power Master](https://appshunter.io/ios/app/battery-saver-power-master/id1514077251) | 4.1 (230) | Free | Utilities |
| [BatteryPhone](https://appshunter.io/ios/app/batteryphone/id1191334332) | 3.7 (148) | Free | Utilities |

## More apps by Wern Jie Lim

- [Penang Property Talk](https://appshunter.io/ios/app/penang-property-talk/id1046420335)
- [Countdown app for iPhone / iPad](https://appshunter.io/ios/app/countdown-app-for-iphone-ipad/id1048418322)
- [Height Ruler (Barometer)](https://appshunter.io/ios/app/height-ruler-barometer/id1048420896)
- [Personal Diary (Journal) App](https://appshunter.io/ios/app/personal-diary-journal-app/id1052570257)
- [WZP for iPad](https://appshunter.io/ios/app/wzp-for-ipad/id1070493796)
- [Pong Game - Simple Classic Arcade Game](https://appshunter.io/ios/app/pong-game-simple-classic-arcade-game/id1181296653)

All apps by Wern Jie Lim: https://appshunter.io/developer/1032934247

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*