# How Fast Charging - Left time for fully charging

> iPhone full charge alarm and estimated charging time notification. (iPhone/iPad app by Kyunghyun Park.)

- Source: https://appshunter.io/ios/app/how-fast-charging-left-time-for-fully-charging/id1107342460 (this page in markdown: same URL + `.md`)
- Developer: [Kyunghyun Park](https://appshunter.io/developer/992878880)
- Category: Lifestyle, Productivity
- Price: Free with in-app purchases
- Rating: 1.40/5 from 17 App Store ratings · 19 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.0 · 25 MB
- Languages: American English, Korean
- Released: 2016-04-29
- Data updated: 2026-06-10
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/how-fast-charging-left-time-for-fully-charging/id1107342460/reviews.md

## What is How Fast Charging?

When the iPhone is fully charged, the alarm rings!

There is an app for full charge time alerts.

Usage is very simple.
1. To check the battery capacity and charge voltage / current, 1 ~ 2% charge is maintained at the state of running the app (screen on).
2. When the time count starts automatically, you can turn off the screen or close the app.
3. Automatically notify when the estimated full charge time is reached.

## Key features

- Full charge alarm notification
- Estimated full charge time calculation
- Background operation
- Battery capacity and voltage/current monitoring
- Simple calibration process

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Pay for cheering developer up | $7.99 | one-time |


## Recent user reviews (10 of 19)

All indexed reviews: https://appshunter.io/ios/app/how-fast-charging-left-time-for-fully-charging/id1107342460/reviews.md

### 1/5 — Rubbish

*2021-01-08, version 2.0.2*

Don’t work - don’t bother downloading - can’t believe I had to give 1 star ⭐️ as this app doesn’t deserve it

### 1/5 — FAKE

*2020-10-19, version 2.0.2*

Everybody said it’s fake it’s absolutely fake don’t download it it’s terrible it’s a fake very fake hate it hate it hate it hate it I’m not even going to give it a star rate it’s a fake why is it even on this app? 😡😡😡😡😡😡😡😡😡😡😡👿👿👿👿👿👿👿👿👿

### 1/5 — Does this even work?!

*2020-08-11*

I don’t think this works even it’s a clickbait i think

### 1/5 — ????

*2019-07-15*

CAN I REPORT THIS GUY SOME HOW

### 1/5 — Hate this app

*2019-05-23*

This is dum (do not try out)

### 1/5 — You are stupid!

*2019-04-25*

Now how do I report this dude…

### 1/5 — Why was this created

*2019-02-24*

To many ads literally all it said was “wait till 1~2% to check”and then goes blank

### 4/5 — Batt 100%.

*2018-09-25, version 2.0.2*

Does everything it says it does, but the free version doesn’t work but the paid one works fine, then u can delete free version. If u r looking for an alarm wen phone is fully charged, then this is PERFECT!

### 1/5 — Faulty

*2018-07-07, version 2.0.2*

Doesn’t do what it says it will do.  Non functional app.  Perhaps scam or malware.  I can’t say this certainly, but i had bad feeling about after .. difficultly uninstall.

### 1/5 — Does not work

*2017-11-29, version 2.0.2*

Soon after plugging you’re device in it starts working telling you 1hour and 17 minutes then the time increases exponentially.

## Frequently asked questions about How Fast Charging

### How Fast Charging - Left time for fully charging alarm works?

The app monitors your iPhone's battery capacity, voltage, and current for 1-2% of charging while the screen is on. It then estimates the full charge time and notifies you automatically when it's reached. You can then close the app or turn off the screen.

### What is the rating for How Fast Charging - Left time for fully charging?

How Fast Charging - Left time for fully charging has a rating of 1.4 stars based on 17 ratings.

### Is How Fast Charging - Left time for fully charging free?

Yes, How Fast Charging - Left time for fully charging is available for free. It also includes in-app purchases.

### What devices support How Fast Charging - Left time for fully charging?

This app is designed for iPhone, iPad, and iPod devices.

### When was How Fast Charging - Left time for fully charging last updated?

The app was last updated on July 27, 2017, with version 2.0.2.

### What is the age rating for How Fast Charging - Left time for fully charging?

The app has an age rating of 4+.

### How accurate is the estimated full charge time in How Fast Charging - Left time for fully charging?

The app estimates full charge time by monitoring battery capacity, voltage, and current. However, actual charging speed can be influenced by various factors, so the estimate should be used as a guide.

### Can I use How Fast Charging - Left time for fully charging without the screen on?

Yes, after the initial 1-2% charge calibration with the screen on, you can turn off the screen or close the app, and it will still provide notifications.

## Version history (last 5 releases)

### 2.0.2 — 2017-07-27

This app has been updated by Apple to display the Apple Watch app icon.

fix bugs

### 2.0.1 — 2017-06-14

Fix bugs

### 2.0 — 2017-01-06

Update UI

### 1.7 — 2016-09-20

fix bugs

### 1.6 — 2016-07-29

fix bugs

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| --- | --- | --- | --- |
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| [4k Live Wallpapers: WallPics](https://appshunter.io/ios/app/4k-live-wallpapers-wallpics/id1545631564) | 4.5 (561) | Free | Lifestyle |
| [Mobile Doctor - Cleaner Master](https://appshunter.io/ios/app/mobile-doctor-cleaner-master/id802041071) | 4.3 (761) | Free | Lifestyle |
| [Battery Charger Animation](https://appshunter.io/ios/app/battery-charger-animation/id1594554382) | 4.7 (98) | Free | Lifestyle |
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| [Wi-Fi Battery Charger](https://appshunter.io/ios/app/wi-fi-battery-charger/id1586964192) | 3.5 (6) | Free | Lifestyle |

## More apps by Kyunghyun Park

- [이름 궁합: 획수 궁합](https://appshunter.io/ios/app/id993476465)
- [Baby Zzz Lite - best baby sleep sounds](https://appshunter.io/ios/app/baby-zzz-lite-best-baby-sleep-sounds/id1009762503)
- [108배 절 운동 다이어트](https://appshunter.io/ios/app/108/id1016271195)
- [애드킬라](https://appshunter.io/ios/app/id1067524505)
- [Patience Timer- Focus on your tasks](https://appshunter.io/ios/app/patience-timer-focus-on-your-tasks/id1069722021)
- [내꺼라 전해라 - 초강력 핸드폰 도난 방지](https://appshunter.io/ios/app/id1070825594)

All apps by Kyunghyun Park: https://appshunter.io/developer/992878880

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*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.*