# Greeneria Smart Water Meter vs Decibel Reader

The clearest difference is in-app purchases: Greeneria Smart Water Meter at none against Decibel Reader's 6. Greeneria Smart Water Meter also leads on ads (none vs shown) and iOS requirement (13.0 vs 16.0). Decibel Reader's advantage is update cadence (every 2 weeks vs every 6 months). On price and device support there is nothing between them.

Both are free to download. Decibel Reader sells 6 in-app purchases, starting at $3.99 per 7 days. Greeneria Smart Water Meter asks for nothing beyond the download.

Greeneria Smart Water Meter ships an update every 6 months, Decibel Reader every 2 weeks. The most recent releases landed on October 30, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Greeneria Smart Water Meter | Decibel Reader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.5 (24 ratings)](https://appshunter.io/ios/app/decibel-reader/id6451411046/reviews)** |
| Number of ratings | — | **24** |
| Positive reviews | — | 80.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | **Every 2 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 32 MB | 12 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [CONNECTCHIP SMART SOLUTIONS](https://appshunter.io/developer/1676882691) | [Andy Sutanto](https://appshunter.io/developer/1659282966) |

## What reviewers say

### Greeneria Smart Water Meter

[App page](https://appshunter.io/ios/app/greeneria-smart-water-meter/id6446239299)

**Features:** macOS Compatibility

**In-app purchases:** none


### Decibel Reader

[App page](https://appshunter.io/ios/app/decibel-reader/id6451411046)

Measure ambient noise levels with real-time readings, tracking minimum, average, and maximum decibels. Offers calibration for accuracy and a dark mode for comfortable viewing. This tool helps you understand your sound environment.

**Highlights:** Real-time decibel measurement, Calibration for accuracy, Track min, average, and max noise levels, Dark mode for low-light use, Simple and intuitive interface

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Decibel Meter Pro - 1 Week | $3.99 | per 7 days |
| Decibel Meter Pro - 1 Month | $7.99 | per month |
| Sound Level Meter - 6 Months | $19.99 | per 6 months |
| Noise Level Meter - 1 Year | $29.99 | per year |
| Decibel Meter Pro - 1Y 2 | $29.99 | per year |
| dB Meter Pro | $49.99 | one-time |


## Frequently asked questions

### Is Greeneria Smart Water Meter free?

Greeneria Smart Water Meter is free to download, with no in-app purchases.

### Is Decibel Reader free?

Decibel Reader is free to download, with in-app purchases available.

### Do Greeneria Smart Water Meter or Decibel Reader have ads?

Decibel Reader shows ads; Greeneria Smart Water Meter does not.

### Which is updated more often, Greeneria Smart Water Meter or Decibel Reader?

Greeneria Smart Water Meter ships an update every 6 months, and Decibel Reader every 2 weeks. Most recently, Greeneria Smart Water Meter was updated on October 30, 2026 and Decibel Reader on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*