Full Battery Charge Alarm is a free Android app that rings when your phone or tablet is charged, so you can unplug it, and it can also ring when the battery runs low. It has 4.7 stars from 38,435 ratings and 1,000,000+ downloads; the listing shows ads and in-app purchases from $1.99 to $3.99.
Quick verdict
If you charge your phone and forget to unplug it, this app does one job: it sounds an alarm at the level you pick. Several reviewers say it stopped them overcharging, and several like how simple it is. The big complaint is reliability. Many reviewers in our sample say the alarm didn’t ring, rang late or stopped working, and several of them use Xiaomi, Redmi, Poco, Vivo or Tecno phones. The listing itself warns that Huawei, OnePlus, Xiaomi and Meizu phones may close the app and links to setup steps. Across all ratings, though, only 3.5% are 1 or 2 stars.
Full Battery Charge Alarm at a glance
| Developer | Syrupy |
|---|---|
| Store listing | Full Battery Charge Alarm on Google Play |
| Price | Free, with in-app purchases from $1.99 to $3.99 per item |
| Ads | Yes |
| Play Store rating | 4.7 stars from 38,435 ratings (83.8% of the ratings in the store’s rating breakdown are 5-star) |
| Downloads | 1,000,000+ |
| Version / last updated | 1.0.366 / October 19, 2026 |
| Requires | Not in our data |
| First released | January 23, 2019 |
| Data checked | October 20, 2026 |
What is Full Battery Charge Alarm?
It’s an alarm for your charger. You open the app, turn the alarm on and change the ringtone or vibration if you want; the listing says that’s all the setup there is. A low battery alarm is an optional beta feature that you switch on in settings and set to a percentage. The app has been on Google Play since January 2019, from a developer called Syrupy.
Key features
- Full charge alarm: rings when the battery is fully charged so you can unplug the phone or tablet.
- Low battery alarm (beta): an optional charge reminder; you turn it on and set the percentage in settings.
- Sound and vibration: pick a custom ringtone or turn the sound off, and turn vibration on or off.
- Simple design: the listing describes a Material design look, a clean interface and no extra features.
- Phone-specific setup: links to instructions for Huawei, OnePlus, Xiaomi and Meizu phones, to stop the system from closing the app or the alarm.
Full Battery Charge Alarm vs. what a battery app should have
“Listed” means the Google Play listing names the feature, “Partial” means it covers part of it, and “Reviews only” or “Reviews and developer replies” means we found it outside the listing. This is an alarm app, so the battery details and estimates that monitor apps show mostly don’t apply.
Must have
| Feature | Status | Notes |
|---|---|---|
| Full-charge alert at a level you choose | Partial | The listing says “fully charged”; reviewers mention setting it at 80%, 90% or 99% |
| Low-battery alert at a level you choose | Listed | Beta. One reviewer says the level can only go up to 60% |
| Alerts that fire reliably in the background | Partial | The listing links to setup steps for four phone brands. Many reviewers say the alarm didn’t ring |
| Sound and vibration options | Listed | |
| Easy to dismiss an alert | Reviews only | A full-screen alert with a slider. Several reviewers find it intrusive |
| Low battery use by the app itself | Partial | The listing says fast and lightweight. A few reviewers report drain or high RAM use |
Should have
| Feature | Status | Notes |
|---|---|---|
| Custom alert sound and volume | Listed | Several reviewers say the default sound plays anyway |
| Quiet hours or a schedule | Not listed | A few reviewers ask for one |
| Battery details (temperature, voltage, current) | Not listed | |
| Charge history or usage chart | Not listed | Two reviewers ask for charge time or history |
| Help or a support contact | Partial | Setup links for Huawei, OnePlus, Xiaomi and Meizu |
| Clear pricing | Partial | The listing says “Free!” and shows in-app purchases, but not what they buy |
Nice to have
| Feature | Status | Notes |
|---|---|---|
| Battery health or capacity estimates | Not listed | |
| Time-left or time-to-full estimates | Not listed | |
| Home screen widget or status bar readout | Not listed | |
| Tablet support | Listed | One reviewer says it doesn’t work on their tablets |
| No ads or an ad-free option | Not listed | The listing shows ads |
| No account required | Not listed |
It covers the two alarms and their sound settings, and nothing else: no battery readings, history or estimates.
Common problems and fixes
Older reports may describe earlier versions. For alarms that don’t ring, the listing’s main fix is its set of setup links.
| Problem | What reviewers report | When | What the listing or the developer’s replies suggest |
|---|---|---|---|
| Alarm doesn’t ring or rings late | Many reviewers. Two say it plays only after they wake the screen; two say it works once and not on the next charge | September 2024 to October 2026 | The listing links to steps for Huawei, OnePlus, Xiaomi and Meizu phones to stop the system closing the app |
| Alarm switches itself off | A few reviewers say the alarm turns off on its own, in one case before reaching 90% | September 2024 to June 2026 | The same setup links |
| Custom ringtone ignored | Several reviewers say the default sound plays or they can’t pick their own; two of them use HyperOS | September 2024 to August 2026 | None in our data |
| Low battery alarm missing | A few reviewers want a low battery alert | November 2024 to October 2026 | Turn on the low battery alarm in settings and set the percentage (reply, October 2026) |
| Screen stays on after an alert | A few reviewers say the screen stays on or flashes until they dismiss the alert, and one says the phone got hot | September 2025 to August 2026 | None in our data |
Pros (from user reviews)
- Stops overcharging: several reviewers say the alarm reminds them to unplug, and one says it wakes them at night to do it. One reviewer in September 2026 says it gives the number of seconds the device was plugged in or unplugged.
- Does what it says: several reviewers say it works well or works as advertised. Many others say it doesn’t (see Cons).
- Simple: several reviewers call it simple or easy to use, and one says it comes without bloat.
- Two alarms: several reviewers like having a low battery alarm as well. One keeps the battery between 30 and 80% with the two limits.
- The alert screen: a few reviewers like the full-screen alert you swipe to stop, and a few like being able to set their own sound, volume or vibration. Several others find the same screen intrusive.
- No ads, for some: a few reviewers say they saw no ads. A few others did.
Cons (from user reviews)
- The alarm doesn’t ring: many reviewers say it didn’t ring, rang late, worked only sometimes or stopped working, including two after an update. Several name Xiaomi, Redmi, Poco, Vivo or Tecno phones, and a few say the app crashes.
- The full-screen alert: several reviewers say it covers games or videos, shows up as a banner they have to tap while using the phone, or won’t go away. A few say it keeps the screen on, which uses battery during a low battery alert.
- Sound settings: several reviewers say their chosen ringtone is replaced by the default sound or can’t be set, and two say the volume is too low. One in December 2025 says each alarm lowered the phone’s ringtone volume.
- No quiet hours: several reviewers want quiet hours, a schedule or a way to skip one charge, and a few say it has woken them at night. Two want only the low battery alarm.
- Battery and memory use: a few reviewers say the app drains the battery or uses a lot of RAM; one in July 2025 measured about 700 MB.
- Ads and notifications: a few reviewers report ads: two describe full-screen ads and one an ad they couldn’t close. Two others dislike a notification that stays in the shade, and one says it keeps repeating.
About a third of the reviews in our sample are 1 or 2 stars because of how the sample was drawn (see the last section). Across all ratings, 3.5% are 1 or 2 stars and 83.8% are 5-star.
Rating breakdown
| Stars | Ratings | Share |
|---|---|---|
| 5 | 32,203 | 83.8% |
| 4 | 3,651 | 9.5% |
| 3 | 1,217 | 3.2% |
| 2 | 486 | 1.3% |
| 1 | 851 | 2.2% |
Source: Google Play ratings histogram, checked October 20, 2026. The histogram adds up to 38,408 ratings, slightly fewer than the 38,435 total, and the shares are of the histogram total.
Pricing
It’s free to install. The listing says it shows ads and has in-app purchases from $1.99 to $3.99 per item without saying what they buy. One reviewer in July 2025 mentions a subscription and says they would pay once instead.
Privacy and permissions
We couldn’t read the Google Play data safety section, so we make no claim about what it declares. The permissions list is short: control vibration, full network access, prevent device from sleeping, run at startup and view network connections. One reviewer in November 2025 says the app asked at first launch for consent to share data with third parties, and one in March 2026 says it keeps coming back after a force stop.
Who it’s for
It suits you if you want a reminder to unplug at a set level and don’t need battery stats. Before you rely on it overnight, follow the listing’s setup steps if your phone closes background apps, and check that the alarm rings on your phone. Skip it if you charge while you sleep and don’t want to be woken, or if you want temperature, health or history readings.
FAQ
Can Full Battery Charge Alarm stop my phone from overcharging?
It rings when the battery reaches your level so you can unplug it; the listing doesn’t say it can stop the charger. Several reviewers say it helps them unplug on time. Many others say the alarm didn’t ring on their phone.
Does Full Battery Charge Alarm have a low battery alarm?
Yes. The listing calls it an optional beta feature that you turn on in settings, where you set the percentage. A developer reply from October 2026 gives the same steps. One reviewer says the level can’t be set above 60%.
Why doesn’t the alarm ring on my phone?
The listing says Huawei, OnePlus, Xiaomi and Meizu phones may close the app or the alarm and links to steps for each brand. Many reviewers say the alarm didn’t ring, and several name Xiaomi, Redmi, Poco, Vivo or Tecno phones. Two say it only rang after they woke the screen.
Does Full Battery Charge Alarm have ads?
The Google Play listing says it contains ads. A few reviewers say they saw none, while a few others report ads: two describe full-screen ads and one an ad they couldn’t close.
How this review was put together
We haven’t tested Full Battery Charge Alarm. This review is based on public information from official sources: the app’s Google Play or App Store listing and rating breakdown, the developer’s website when there is one, and recent user reviews on the store with the developer’s replies. Features and claims are the developer’s own descriptions; what users like and dislike comes from the store reviews. Everything was checked on October 20, 2026. Apps change with every update, so check the store listing before you install.
