Comparison

BATT SYNC vs EM3720

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

Head to head
About

BATT SYNC

Features
Read full description

BATT SYNC is a wireless battery & electrical system tester controlled by our applications. It also comes with an automatic battery monitor and saves the results into the built-in calendar. Furthermore, BATT SYNC supports our cloud data management service as well. Features: 1. Battery Monitor Real-time battery monitoring and sends out notification automatically. 2. Battery, Cranking, & Charging system tester 12V battery / 12V START-STOP battery test / 12V & 24V cranking/charging system test / 3. Start/Stop Battery Test Available Performs accurate test for Start/Stop batteries. 4. Graphical User Interface The interactive interface makes the operation easier and provides the test results clearly. 5. Vehicle & Battery Info Available Supports VIN & Battery S/N scan 6. Customer & Shop Info Available Capable of editing & saving customer & shop info. 7. Calendar Easily identifies which and when that the test has been performed from the calendar. 8. Remote Control via Applications All the test procedures are remotely controlled by the iOS application. 9. Share Test Results Capability Test results could be share via communication applications or email 10. Cloud Data Management Capability Supports our cloud data management service 11. Field Upgrade Upgrades the tester via our applications. 12. Name the Tester Able to name different testers to easily identify multiple testers. 13. Group Test Capability Able to perform group/batch battery test.

About

EM3720

Features
Read full description

EM3720 App is for use with the EM3720 Meter. It enables your iOS device to View, Monitor, and Capture Pictures. As well as, Data Log the date/time stamped readings of the Smart Meter to Phones & Tablets. The exported test results can be shared via EMAIL, TEXT, PICTURE, and to EXCEL Wirelessly connects via Bluetooth to view AC voltage, DC voltage, Resistance, Continuity and Diode Test Saves Time and Money: 1.Identifies, alerts, captures and sends data instantly 2.Maximizes time โ€“ less re-checking 3.Problems captured - so repairs are easier Works on all iPhone, IPads, IPad Touches

Screenshots

BATT SYNC4 screens
EM37201 screens

Verdict

The call

The clearest difference is iOS requirement: EM3720 at 11.0 against BATT SYNC's 15.6. On price, update cadence, ads and in-app purchases there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

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

UpkeepUpdate frequency

BATT SYNC ships an update every 6 months, EM3720 every 4 months. The most recent releases landed on September 21, 2026 and September 18, 2026 respectively.

Scorecard1 real difference ยท 5 level
BATT SYNC versus EM3720: the parameters behind the verdict, then further details
ParameterBATT SYNCEM3720
PriceFreeFree
Update frequencyEvery 6 monthsEvery 4 months โ€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPad, iPod โ€” better
Requires iOS15.611.0 โ€” better
Further details โ€” not scored
Size34 MB6 MB
Age rating4+17+
DeveloperDHC Specialty Corp.ZHANGZHOU EASTERN INTELLIGENT METER CO., LTD.

In-app purchases

None

BATT SYNC

No in-app purchases

None

EM3720

No in-app purchases

Questions

Is BATT SYNC free?
BATT SYNC is free to download, with no in-app purchases.
Is EM3720 free?
EM3720 is free to download, with no in-app purchases.
Do BATT SYNC or EM3720 have ads?
Neither BATT SYNC nor EM3720 shows ads.
Which is updated more often, BATT SYNC or EM3720?
BATT SYNC ships an update every 6 months, and EM3720 every 4 months. Most recently, BATT SYNC was updated on September 21, 2026 and EM3720 on September 18, 2026.

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