Comparison

Lang Tools Wireless vs EM3720

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

Head to head

About

Lang Tools Wireless

Features

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The “Lang Tools Wireless” transmits the data via Bluetooth 4.0. Currently, this App is able to use on Lang 13810.

About

EM3720

Features

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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 – less re-checking 3.Problems captured - so repairs are easier Works on all iPhone, IPads, IPad Touches

Screenshots

Lang Tools Wireless3 screens

EM37201 screens

Verdict

The call

The clearest difference is update cadence: Lang Tools Wireless at every 3 weeks against EM3720's every 4 months. 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

Lang Tools Wireless ships an update every 3 weeks, EM3720 every 4 months. The most recent releases landed on September 26, 2026 and September 18, 2026 respectively.

Scorecard1 real difference · 5 level

Lang Tools Wireless versus EM3720: the parameters behind the verdict, then further details
Parameter	Lang Tools Wireless	EM3720
Price	Free	Free
Update frequency	Every 3 weeks — better	Every 4 months
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPod	iPhone, iPad, iPod — better
Requires iOS	12.0	11.0 — better
Further details — not scored
Size	2 MB	6 MB
Age rating	4+	17+
Developer	Kane Asia Inc.	ZHANGZHOU EASTERN INTELLIGENT METER CO., LTD.

In-app purchases

None

Lang Tools Wireless

No in-app purchases

None

EM3720

No in-app purchases

Questions

Is Lang Tools Wireless free?

Lang Tools Wireless is free to download, with no in-app purchases.

Is EM3720 free?

EM3720 is free to download, with no in-app purchases.

Do Lang Tools Wireless or EM3720 have ads?

Neither Lang Tools Wireless nor EM3720 shows ads.

Which is updated more often, Lang Tools Wireless or EM3720?

Lang Tools Wireless ships an update every 3 weeks, and EM3720 every 4 months. Most recently, Lang Tools Wireless was updated on September 26, 2026 and EM3720 on September 18, 2026.