Comparison

KSB Sonolyzer vs EWG ECM

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

Head to head

Signing Documents

About

KSB Sonolyzer

Features

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The first App that hears if you save energy. KSB Sonolyzer enables you to appraise the efficiency or inefficiency of pumps and other rotating equipment by simply listening. You enter four parameters which you can find on the type plate of the machine and hold your mobile device for 20 seconds close to the fan of the induction motor operated with constant supply voltage and frequency. Sonolyzer captures the operational noise with the inbuilt microphone and analyses the noise spectrum within seconds. The results are displayed afterwards on your device display, e.g. that pump and motor are operated in partial load. You can request advice based on your individual analysis, and your locally responsible KSB contact can connect seamlessly to your analysis.

About

EWG ECM

Features

Read full description

ECM for Eastwater

Screenshots

KSB Sonolyzer4 screens

EWG ECM4 screens

Verdict

The call

The clearest difference is update cadence: EWG ECM at every 5 weeks against KSB Sonolyzer's every 4 months. EWG ECM also leads on iOS requirement (12.0 vs 16.0). 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

KSB Sonolyzer ships an update every 4 months, EWG ECM every 5 weeks. The most recent releases landed on September 18, 2026 and September 8, 2026 respectively.

Scorecard2 real differences · 4 level

KSB Sonolyzer versus EWG ECM: the parameters behind the verdict, then further details
Parameter	KSB Sonolyzer	EWG ECM
Price	Free	Free
Update frequency	Every 4 months	Every 5 weeks — better
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPad	iPhone, iPad, iPod — better
Requires iOS	16.0	12.0 — better
Further details — not scored
Size	88 MB	35 MB
Age rating	4+	4+
Developer	KSB SE & Co. KGaA	GINKGO SOFT COMPANY LIMITED

In-app purchases

None

KSB Sonolyzer

No in-app purchases

None

EWG ECM

No in-app purchases

Questions

Is KSB Sonolyzer free?

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

Is EWG ECM free?

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

Do KSB Sonolyzer or EWG ECM have ads?

Neither KSB Sonolyzer nor EWG ECM shows ads.

Which is updated more often, KSB Sonolyzer or EWG ECM?

KSB Sonolyzer ships an update every 4 months, and EWG ECM every 5 weeks. Most recently, KSB Sonolyzer was updated on September 18, 2026 and EWG ECM on September 8, 2026.