Comparison

Battery Master 12V vs CaringCharge

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Battery Master 12V

This tool detects and tests lead-acid batteries, assessing CCA and health. It calculates remaining battery life based on temperature and CCA data. Users can also test cranking and charging systems, with all results shareable and printable.

Highlights
  • Lead-acid battery detection
  • Test battery CCA and health
  • Calculate available use life
  • Test cranking system
  • Test charging system
  • Share and print test results
Features
Read full description

Battery Master is the detection tool for lead acid battery. By installed on battery, it can intelligently test battery CCA and health condition, calculate battery available use life based on temperature and CCA data sheet. When phone is close to device, the app will automatically obtain battery test result. Also, user can alternatively test battery health, cranking system and charging system. All saved history test results can be shared and printed out.

About

CaringCharge

This app helps optimize battery charging for iPhones and iPads using HomeKit outlets and Shortcuts automation. It offers modes to stop charging at specific percentages, extending battery lifespan.

Highlights
  • Optimized Battery Charging
  • HomeKit integration
  • Shortcuts App automation
  • Custom charging modes
  • 80% charge cutoff
  • Multiple device support
Read full description

Will improve battery life with 'Optimized Battery Charging'. You can optimize battery charging on iPad (Of course on iPhone) which have no 'Optimized Battery Charging' ! The outlet works with Apple HomeKit is necessary to use this App. Available the auto launch with automation of the Shortcuts App. (https://apps.apple.com/us/app/shortcuts/id915249334) Set the Auto launch when connected to power is as following ... (Shortcuts App -> Automation -> '+' on upper right edge -> Create Personal Automation -> Charger -> Is Connected-> Next->Add Action -> Apps -> CaringCharge -> Next-> Turn off 'Ask Before Running' -> Done). Then Long tap 'Caring' or 'Normal' button on the CaringCharge App (Yellow line will be drawn around it). Need user confirmation when the device is locked (the specification of the iOS). In a word, this App is semi- automatic version of iOS standard function 'Optimized Battery Charging'. You can set as you like because of 'non full auto' settings (e.g. In 'Normal' and 'Cut at 80%' mode, the App stops charging at 80% without restarting to 100%). The App is developed because 'Optimized Battery Charging' on iOS 13 is not work appropriately in the circumstance on the developer. 'Caring' mode suspend charging when reached to about 80% capacity, afterwards restart at the time set. 'Normal' mode simply charge until reaching the capacity set. Difference is if the App restart charging. In-App-Purchase supports multiple devices in home and multiple homes. At first glance, the App works without In- App- Purchase in those condition, but doesn't. In-App-Purchase also includes removing Ad. , so it's suitable for devices which have more smaller display (e.g. iPhone 5s, SE ...). While the activity indicator beside the 'App Status' red colored, the App is updating the Homekit settings. Keep the App foreground during activity indicator colored. '80% cut-off Normal Charge Mode' is very suitable for storing the devices, because batteries are damaged depending on the duration of full capacity and nevertheless damaged seriously if empty. (The latest version of the Shortcuts App is superior about this function.) Connect charger to the outlet work with HomeKit, please. Lower current (not faster) charger is better in terms of battery damage. The App is not tested with wireless charger. The battery is burdened more. But if request, will develop correspondence to wireless charger. The App can't work on background due to restriction of iOS. So this App can't control charging completely, but execute as ideal as possible. It's almost impossible to stop charging at 100% or 80% (on 'Caring' mode) capacity finally due to restriction of iOS, so the App send notification especially with sound on the situation. (Works well with the Shortcuts App set to turn off the outlet at the level of the capacity each.) 'Optimized Battery Charging' is recommended to 'Off' not to conflict with this App. (Settings -> Battery -> Battery Health -> ) Tips for 2 'Auto' mode is in the notice which appear when manipulate the switch. To resister smart plug, please use Apple genuine 'Home' App. https://support.apple.com/en-us/HT208724 (For the user who uses the device supported until iOS 9) On iOS 9, please use appropriate App which works with Apple HomeKit, because of not available 'Home' App.

Screenshots

Battery Master 12V4 screens
CaringCharge3 screens

Verdict

The call

The clearest difference is rating: Battery Master 12V at 3.4 against CaringCharge's 1.0. Battery Master 12V also leads on ads (none vs shown) and monetization model (free vs free with in-app purchases). CaringCharge's advantage is iOS requirement (12.1 vs 15.6). On price, review sentiment, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Battery Master 12V holds the better App Store score, 3.4 against 1.0. That said, the two scores are not equally well evidenced: Battery Master 12V has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews split almost evenly too, at 0% and 0% positive.

UpkeepUpdate frequency

Battery Master 12V ships an update every 6 weeks, CaringCharge every 3 months. The most recent releases landed on October 17, 2026 and October 24, 2026 respectively.

Scorecard6 real differences · 4 level
Battery Master 12V versus CaringCharge: the parameters behind the verdict, then further details
ParameterBattery Master 12VCaringCharge
PriceFreeFree
Rating3.4 (5 ratings) — better1.0 (1 ratings)
Positive reviews0.0% of reviews0.0% of reviews
Number of ratings5 — better1
Update frequencyEvery 6 weeks — betterEvery 3 months
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.612.1 — better
Further details — not scored
Size39 MB21 MB
Age rating4+4+
DeveloperShenzhen Leagend Optoelectronics Co., Ltd.Yuji Nagata

Customer experience

Battery Master 12V

All ratings5 ratings
Positive40.0%
Neutral40.0%
Negative20.0%
Written reviews3 reviews
Positive0.0%
Neutral33.3%
Negative66.7%

CaringCharge

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Battery Master 12V

No in-app purchases

None

CaringCharge

No in-app purchases

Questions

Is Battery Master 12V free?
Battery Master 12V is free to download, with no in-app purchases.
Is CaringCharge free?
CaringCharge is free to download, with no in-app purchases.
Which has better reviews, Battery Master 12V or CaringCharge?
Battery Master 12V is rated higher. Battery Master 12V averages 3.4 out of 5 from 5 ratings, while CaringCharge averages 1.0 from 1 ratings.
Do Battery Master 12V or CaringCharge have ads?
CaringCharge shows ads; Battery Master 12V does not.
Which is updated more often, Battery Master 12V or CaringCharge?
Battery Master 12V ships an update every 6 weeks, and CaringCharge every 3 months. Most recently, Battery Master 12V was updated on October 17, 2026 and CaringCharge on October 24, 2026.

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