Comparison

Battery Master 12V vs 4GIOT

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

4GIOT

Features
Read full description

Smart IoT Cloud Assistant - Description I. Overview The Smart IoT Cloud Assistant is based on the NB-IOT wireless communication network, using NB communication modules, mobile Internet, big data, and cloud computing to monitor the status of fire protection facilities and equipment and the surrounding fire safety environment in real time. II. Functional characteristics 1. Real-time monitoring Fire protection data is different from other industry data. The real-time requirements for data collection are very high. The system uses the unique heartbeat sensing mechanism of the equipment to perceive the operating status of equipment facilities in real time. When the equipment alarms, the system receives the alarm information in time based on the high real-time performance design, and pushes the information to the mobile phone APP of relevant personnel in time. Real-time data collection provides a basic guarantee for rapid fault handling and rapid handling of alarms. 2. Platform interconnection and comprehensive application The Smart IoT Cloud Assistant supports ultra-large system scale and flexible deployment. The system can flexibly select the deployment mode of "fire brigade-fire brigade-social unit" from top to bottom. The hierarchical, decentralized, and domain-based management mode can be smoothly expanded to further improve the system capacity and meet the needs of long-term and rapid business development. 3. Patrol customization and full-process recording According to the job responsibility system, daily safety patrol plans are distributed, executed, hidden dangers reported, and rectification reports are made. Through system big data statistics, the implementation of the main responsibility is analyzed, and the responsibilities of the legal person responsible are clarified, which changes the current situation of inadequate safety patrols and untrue inspection records. Intelligent patrol management (RFID, patrol standards, APP) solves the problem of patrol standardization, authenticity, and traceability of records. 4. Hidden danger rectification and closed-loop management When the front-end sensing equipment detects an abnormal situation, it is automatically pushed to the first-level patrol personnel. The patrol personnel will conduct on-site inspections as soon as possible, or the patrol personnel will find hidden dangers during daily fire prevention patrols. They can report to the fire manager on the mobile phone at any time. The fire manager initiates a maintenance/rectification notice. After the maintenance/rectification, it is confirmed by the patrolman, and the confirmation information is synchronized to the fire manager. The fire manager reviews and confirms the maintenance/rectification work order, and the hidden danger is eliminated. 5. Alarm processing, layered control The system manages user permissions in a hierarchical manner. The system manages permissions in a hierarchical manner, including the first level (fire control personnel, patrol personnel, building (construction) managers, engineering department managers, micro fire stations, full-time (part-time) fire managers), the second level (fire managers), and the third level (fire managers, legal persons). 6. Data application, smart firefighting "Smart firefighting big data" certainly requires a huge and complex information system, which is the basis of our decision-making and control, but what really reflects "wisdom" is the ability to intelligently process and analyze massive data.

Screenshots

Battery Master 12V4 screens
4GIOT3 screens

Verdict

The call

The clearest difference is update cadence: Battery Master 12V at every 6 weeks against 4GIOT's every 9 months. 4GIOT's advantage is iOS requirement (13.0 vs 15.6). On price, ads, 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.

UpkeepUpdate frequency

Battery Master 12V ships an update every 6 weeks, 4GIOT every 9 months. The most recent releases landed on September 10, 2026 and May 14, 2026 respectively.

Scorecard2 real differences · 8 level
Battery Master 12V versus 4GIOT: the parameters behind the verdict, then further details
ParameterBattery Master 12V4GIOT
PriceFreeFree
Rating3.4 (5 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings5 — better—
Update frequencyEvery 6 weeks — betterEvery 9 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.613.0 — better
Further details — not scored
Size39 MB71 MB
Age rating4+4+
DeveloperShenzhen Leagend Optoelectronics Co., Ltd.XiaoBo Gao

In-app purchases

None

Battery Master 12V

No in-app purchases

None

4GIOT

No in-app purchases

Questions

Is Battery Master 12V free?
Battery Master 12V is free to download, with no in-app purchases.
Is 4GIOT free?
4GIOT is free to download, with no in-app purchases.
Do Battery Master 12V or 4GIOT have ads?
Neither Battery Master 12V nor 4GIOT shows ads.
Which is updated more often, Battery Master 12V or 4GIOT?
Battery Master 12V ships an update every 6 weeks, and 4GIOT every 9 months. Most recently, Battery Master 12V was updated on September 10, 2026 and 4GIOT on May 14, 2026.

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