Comparison

Windmill Pro vs Sound Meter

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

Head to head
About

Windmill Pro

Monitor your Automaxx Windmill wind turbines directly from your smartphone. Track operational data and status via Bluetooth, including voltage, charge levels, and generation metrics.

Highlights
  • Monitor wind turbine operation
  • Track functional data
  • View operating status
  • Bluetooth connectivity
  • Generating Voltage
  • Battery Charge Level Indicator
  • Brake/Unbrake control
Read full description

The Windmill Pro App allows you to monitor the operation of your Automaxx Windmill wind turbines. You can keep track of the functional data and operating status of the wind turbine from your smartphone via Bluetooth. Feature: * Basic - Generating Voltage - Battery Charge Level Indicator - Brake or Unbrake * Advance - Generating Voltage - Generating Ampere - Generating Wattage - Generating Wattage Lifetime

About

Sound Meter

Features
Read full description

Sound Meter - Noise Meter dB helps you measure ambient sound levels using the built-in microphone. Use it to check everyday noise at home, in the office, on the street, in a classroom, studio, or any other environment. The app shows sound levels in decibels and helps you better understand how loud your surroundings are. Features: • Real-time sound level measurement • Clear decibel display • Simple, focused interface • Useful for quick noise checks • Works directly on your device Please note: built-in microphones are not a replacement for professional calibrated sound level meters. Measurements may vary depending on device model, microphone condition, case, and environment. For legal, medical, workplace safety, or engineering purposes, use certified professional equipment. The app metadata has been updated to include the Terms of Use (EULA) link in the App Description. Inside the app, the Privacy Policy and Terms of Use links are available on the subscription/paywall screen. Privacy Policy: https://sergeykushner.github.io/app-privacy.html?id=sound-meter Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Windmill Pro2 screens
Sound Meter4 screens

Verdict

The call

The clearest difference is in-app purchases: Windmill Pro at none against Sound Meter's 3. Windmill Pro also leads on device support (3 vs 1) and iOS requirement (9.3 vs 26.0). Sound Meter's advantage is update cadence (fortnightly vs every 12 months). On price and ads 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. Sound Meter sells 3 in-app purchases, starting at $0.99 per month. Windmill Pro asks for nothing beyond the download.

UpkeepUpdate frequency

Windmill Pro ships an update every 12 months, Sound Meter fortnightly. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 6 level
Windmill Pro versus Sound Meter: the parameters behind the verdict, then further details
ParameterWindmill ProSound Meter
PriceFreeFree
Rating1.0 (2 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 12 monthsFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS9.3 — better26.0
Further details — not scored
Size12 MB5 MB
Age rating4+4+
DeveloperDIGISINE ENERGYTECH CO.,LTD.Sergey Kushner

In-app purchases

None

Windmill Pro

No in-app purchases

3 purchases

Sound Meter

Subscriptions2
  • Month$0.991 Month
  • Year$2.991 Year
One-time1
  • Lifetime$4.99

Questions

Is Windmill Pro free?
Windmill Pro is free to download, with no in-app purchases.
Is Sound Meter free?
Sound Meter is free to download, with in-app purchases available.
Do Windmill Pro or Sound Meter have ads?
Neither Windmill Pro nor Sound Meter shows ads.
Which is updated more often, Windmill Pro or Sound Meter?
Windmill Pro ships an update every 12 months, and Sound Meter fortnightly. Most recently, Windmill Pro was updated on November 2, 2026 and Sound Meter on October 31, 2026.

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