Comparison

EM3720 vs MDA831 Dynamic

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

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

About

MDA831 Dynamic

Features
Read full description

After connecting App to Car Amplifier with Integrated DSP, EQ, BASS, TIME ALIGNMENT, PHASE, MUTE, FILTER , SAVE SOUND SETTING TO PHONE, SAVE SOUND SETTING TO AMPLIFIER, LOAD SOUND SETTING FROM PHONE, RCA OUTPUT etc could be controlled through this App. How to use: 1.Install App and turn on power of car 2. Turn on Bluetooth on your iPhone 3,Open App and wait for around 5 seconds, then click β€œConnect” icon in left corner of bottom. Amplifier will be connected to App automatically. 4.DIY you preferred sound and then click β€œSave to AMP” icon to save. Or click β€œ Save to Phone” to save. Note: 1.Do not exit app during saving and do not turn off power supply, program may be shut down caused by this.

Screenshots

EM37201 screens
MDA831 Dynamic3 screens

Verdict

The call

The clearest difference is update cadence: MDA831 Dynamic at every 2 months against EM3720's every 4 months. On price, ads, in-app purchases and device support there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

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

UpkeepUpdate frequency

EM3720 ships an update every 4 months, MDA831 Dynamic every 2 months. The most recent releases landed on October 5, 2026 and October 4, 2026 respectively.

Scorecard1 real difference Β· 5 level
EM3720 versus MDA831 Dynamic: the parameters behind the verdict, then further details
ParameterEM3720MDA831 Dynamic
PriceFreeFree
Update frequencyEvery 4 monthsEvery 2 months β€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPod β€” betteriPhone, iPod
Requires iOS11.0 β€” better12.0
Further details β€” not scored
Size6 MB4 MB
Age rating17+4+
DeveloperZHANGZHOU EASTERN INTELLIGENT METER CO., LTD.ζη”Ÿ 卒

In-app purchases

None

EM3720

No in-app purchases

None

MDA831 Dynamic

No in-app purchases

Questions

Is EM3720 free?
EM3720 is free to download, with no in-app purchases.
Is MDA831 Dynamic free?
MDA831 Dynamic is free to download, with no in-app purchases.
Do EM3720 or MDA831 Dynamic have ads?
Neither EM3720 nor MDA831 Dynamic shows ads.
Which is updated more often, EM3720 or MDA831 Dynamic?
EM3720 ships an update every 4 months, and MDA831 Dynamic every 2 months. Most recently, EM3720 was updated on October 5, 2026 and MDA831 Dynamic on October 4, 2026.

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