Comparison

KSB Sonolyzer vs VoiceLine

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

Head to head
About

KSB Sonolyzer

Features
Read full description

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

VoiceLine

This app offers smart voice messaging for businesses, combining voice recording with automatic transcription. It's ideal for remote and hybrid teams, allowing asynchronous communication and integration with popular business tools.

Highlights
  • Hybrid voice-to-text messaging
  • Automatic transcription
  • Asynchronous communication
  • Remote collaboration tool
  • Integration with Slack, Teams, Jira
  • Record messages on the go
Features
Read full description

VoiceLine — Your AI Assistant for the Field VoiceLine is an AI assistant built for anyone who works in the field, not another app you have to feed. Wherever your job happens away from a desk, you just talk, and VoiceLine turns what you say into everything the rest of your work requires: reports, tasks, updates to your systems, a record of what actually happened. No typing, no forms, no catching up on admin after hours. Walk into every visit already prepared: VoiceLine briefs you beforehand on the account's history, open items, and anything worth knowing before you walk in, so you show up sharp instead of scrambling in the parking lot. When you're done, debrief by voice on your way to the next stop and hand the paperwork to your assistant. It drafts the report, updates the record, and queues the follow-ups, so your evenings stay yours. And when something worth knowing comes up in conversation, like a competitor mention, a pricing objection, or a complaint, VoiceLine catches it and flags it, turning things you'd normally forget by lunch into intelligence your company can actually act on. Beyond each visit, VoiceLine keeps working in the background throughout your day, nudging you when something needs attention and surfacing the next best action before you have to ask for it, so the busywork flows to you instead of you having to go find it. Less time on data entry, more time doing the job you're actually there for.

Screenshots

KSB Sonolyzer4 screens
VoiceLine4 screens

Verdict

The call

The clearest difference is update cadence: VoiceLine at every 5 days against KSB Sonolyzer'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

KSB Sonolyzer ships an update every 4 months, VoiceLine every 5 days. The most recent releases landed on October 5, 2026 and October 24, 2026 respectively.

Scorecard1 real difference · 9 level
KSB Sonolyzer versus VoiceLine: the parameters behind the verdict, then further details
ParameterKSB SonolyzerVoiceLine
PriceFreeFree
Rating—4.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 4 monthsEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad — betteriPhone
Requires iOS16.0 — better16.4
Further details — not scored
Size88 MB69 MB
Age rating4+4+
DeveloperKSB SE & Co. KGaAVoiceLine Gmbh

In-app purchases

None

KSB Sonolyzer

No in-app purchases

None

VoiceLine

No in-app purchases

Questions

Is KSB Sonolyzer free?
KSB Sonolyzer is free to download, with no in-app purchases.
Is VoiceLine free?
VoiceLine is free to download, with no in-app purchases.
Do KSB Sonolyzer or VoiceLine have ads?
Neither KSB Sonolyzer nor VoiceLine shows ads.
Which is updated more often, KSB Sonolyzer or VoiceLine?
KSB Sonolyzer ships an update every 4 months, and VoiceLine every 5 days. Most recently, KSB Sonolyzer was updated on October 5, 2026 and VoiceLine on October 24, 2026.

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