Premium
Download Ampere v3.21 APK
Target: Android 9.0 (Pie, API 28)
What's new in Ampere v3.21
v3.21
* Bug fixes and minor enhancements
Ampere FAQ: goo.gl/R8XgXX
For more info please read the change history: Settings => About Ampere => Change history
Note: When ampere would stuck in "measuring" state (after a firmware upgrade) please clear Amperes's app cache.
1.) Open the "Android Settings app" => "Apps" => "Ampere"
2.) Clear all data under the "Storage" menu
3.) Restart Ampere
About Ampere v3.21
Did you ever felt, that one Charger/USB cable set charges your device really fast and the other not? Now, you can prove this with Ampere.
Premium
Measure the charging and discharging current of your battery.
PRO features:
- Widgets
- Notification
- Alerts on device
- Alerts on Android Wear
Not every device is supported because there are devices which lacks an appropriate measurement chip (or the interface) and they can not be supported at all. Please read the list of not supported phones at the end of the description.
The app is not meant to be mA accurate. It is only good for evaluate which Charger/USB cable combo is working the best for you on the same device.
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Please read also the FAQ: goo.gl/R8XgXX
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Start the app and wait ca. 10 seconds ("measuring" is on the display). After this time, the charging or discharging current will be shown.
The current depends on many things:
- Charger (USB/AC/Wireless)
- USB cable
- Phone type
- Current tasks running
- Display brightness
- WiFi state
- GPS state
Please don't use the readings on this app as concrete science. However, the readings are good enough to relatively measure how various chargers and USB cables fair on the same device.
If the app shows 0mA all the time, please use the settings option "Old measurement method". You can force the app with it to use the old measurement interface, if the Lollipop device has at least one.
Unfortunately some Samsung devices don't give correct (measured) values (e.g.: S5), just the maximum possible charging current with the actual USB cable/charger configuration. This is a firmware problem.
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Background info: The app measures the charging/discharging current of the battery. If your phone is not connected to a charger, you see the discharging current which is negative. If you connect a charger then the current what the charger gives will be used to supply your phone and the remaining power will be charged into the battery.
If your phone consumes 300 mA without a charger connected (-300mA on the display), then a 500 mA charger will charge your battery maximum with 200 mA current (200mA on display).
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Technical info: The displayed current is an average value from 50 measurements minus the 10 upper values and the 10 lower values. The displayed current can be shaky or unstable or even zero which means, that the Android system provides unstable values. Every company uses different battery types and other hardware making it difficult to get accurate results about your charger.
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LiPo batteries don't draw the maximum for the full time it takes to charge the phone. If your battery is charged almost full then the charging current will be much less as by lower battery levels.
- A graph explaining LiPo charge stages: batteryuniversity.com/_img/content/ion1.jpg
- Dave's (EEVBlog) LiPo Charging Tutorial: youtu.be/A6mKd5_-abk
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Phones/ROMS compatible only with "Old measurement method" switched on and selected the right "Measurement interface":
➤ HTC One M7 / M8
➤ LG G3
Phones/ROMS reported to be not working with this app:
➤ Galaxy Grand Prime - fortuna3gdtv
➤ Galaxy Note2 - t03g, t03gchn, t03gchnduos, t03gcmcc, t03gctc, t03gcuduos
➤ Galaxy S3 - d2att, d2spr, d2vmu
➤ Galaxy Tab4 7.0 - degas3g
➤ HTC Desire 510 - htc_a11ul8x26
➤ HTC One S (ville), X (endeavoru), XL (evita)
➤ HTC Sensation 4G - pyramid
Please do not give wrong rating, if your phone is one of the above. Not the app is wrong, but your phone does not support this kind of measurement yet.
If the app doesn't work on your device with pre-Lollipop Android version, then please read the first and the second posts in this XDA developer forum thread: goo.gl/pZqJg8 . Please post your problem with screenshots in the XDA thread.
Please read also the FAQ: goo.gl/R8XgXX
Ampere v3.21 variants
This release may come in several variants. Consult our handy FAQ to see which download is right for you.
Version:v3.55(261) for Android 4.1+ (Jelly Bean, API 16)
Uploaded:May 29, 2022 at 12:52PM UTC
File size:10.3 MB
Downloads:2,041
Version:v3.54(260) for Android 4.1+ (Jelly Bean, API 16)
Uploaded:April 25, 2022 at 6:33AM UTC
File size:10.3 MB
Downloads:264
Version:v3.53(259) for Android 4.1+ (Jelly Bean, API 16)
Uploaded:February 1, 2022 at 5:38AM UTC
File size:10.05 MB
Downloads:560
Version:v3.52(258) for Android 4.1+ (Jelly Bean, API 16)
Uploaded:January 9, 2022 at 9:13AM UTC
File size:9.48 MB
Downloads:269
Version:v3.51(257) for Android 4.1+ (Jelly Bean, API 16)
Uploaded:December 15, 2021 at 9:36PM UTC
File size:9.48 MB
Downloads:241
Version:v3.50(256) for Android 4.1+ (Jelly Bean, API 16)
Uploaded:October 18, 2021 at 8:56PM UTC
File size:9.54 MB
Downloads:435
Version:v3.48(254) for Android 4.1+ (Jelly Bean, API 16)
Uploaded:October 10, 2021 at 5:07PM UTC
File size:9.54 MB
Downloads:167
Version:v3.46(252) for Android 4.1+ (Jelly Bean, API 16)
Uploaded:September 21, 2021 at 4:29AM UTC
File size:9.53 MB
Downloads:173
Version:v3.45(251) for Android 4.1+ (Jelly Bean, API 16)
Uploaded:September 6, 2021 at 3:58AM UTC
File size:9.59 MB
Downloads:200
Version:v3.44(250) for Android 4.1+ (Jelly Bean, API 16)
Uploaded:September 1, 2021 at 7:05PM UTC
File size:9.58 MB
Downloads:129
Version:v4.35.11
Uploaded:January 12, 2026 at 2:35AM UTC
File size:18.01 MB
Downloads:48
Version:v4.35.10
Uploaded:December 9, 2025 at 4:38AM UTC
File size:17.52 MB
Downloads:280
Version:v4.35.9
Uploaded:August 25, 2025 at 5:10PM UTC
File size:16.59 MB
Downloads:613
Version:v4.35.8
Uploaded:June 3, 2025 at 4:51AM UTC
File size:16.85 MB
Downloads:387
Version:v4.35.7
Uploaded:May 8, 2025 at 6:36AM UTC
File size:16.74 MB
Downloads:157
Version:v4.35.6
Uploaded:April 26, 2025 at 9:29PM UTC
File size:16.72 MB
Downloads:14
Version:v4.35.3
Uploaded:March 6, 2025 at 6:39PM UTC
File size:16.23 MB
Downloads:319
Version:v4.35.2
Uploaded:February 20, 2025 at 10:20PM UTC
File size:16.2 MB
Downloads:148
Version:v4.35.1
Uploaded:February 10, 2025 at 7:42PM UTC
File size:16.2 MB
Downloads:30
Version:v4.17
Uploaded:June 27, 2024 at 5:13AM UTC
File size:12.13 MB
Downloads:1,477
