# SmarterNoise vs ZenLevel

The clearest difference is in-app purchases: ZenLevel at none against SmarterNoise's 2. ZenLevel also leads on ads (none vs shown) and rating (5.0 vs 4.6). SmarterNoise's advantage is ratings volume (118 vs 1) and update cadence (every 6 weeks vs every 5 months). On price and device support there is nothing between them.

Both are free to download. SmarterNoise sells 2 one-off in-app purchases. ZenLevel asks for nothing beyond the download.

ZenLevel holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: SmarterNoise has 118 ratings behind it against 1, so its average is the more settled of the two.

SmarterNoise ships an update every 6 weeks, ZenLevel every 5 months. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | SmarterNoise | ZenLevel |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (118 ratings)](https://appshunter.io/ios/app/smarternoise/id1384299042/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/zenlevel/id6762086055/reviews)** |
| Number of ratings | **118** | 1 |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 6 weeks** | Every 5 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 27 MB | 4 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 12+ | 4+ |
| Developer | [Johan Rogard](https://appshunter.io/developer/1384299041) | [YANMIN WANG](https://appshunter.io/developer/1867998387) |

## What reviewers say

### SmarterNoise

[App page](https://appshunter.io/ios/app/smarternoise/id1384299042)

This app measures sound levels, records audio and video, and provides information on noise exposure risks. It features smart icons to help users understand the impact of noise on health and cognitive performance. Save, share, and archive your recordings with this comprehensive tool.

**Highlights:** Sound level measurement, Video and audio recording, Noise exposure risk information, Smart icons for health impact, Archive and sharing of recordings, Calibration, Location and time display

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Long-term measurement | $1.99 | one-time |
| Remove ads | $2.99 | one-time |


### ZenLevel

[App page](https://appshunter.io/ios/app/zenlevel/id6762086055)

Transform your device into a precision inclinometer with a calm, deliberate feel. Offers multiple measurement modes for surface, plumb, and calibration, with a history log for saved readings. Designed with a focus on privacy and a realistic tool aesthetic.

**Highlights:** Surface measurement mode, Plumb measurement mode, Calibration and zeroing, Measurement history log, Landscape precision mode, Haptic feedback, Privacy-focused design

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

**In-app purchases:** none


## Frequently asked questions

### Is SmarterNoise free?

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

### Is ZenLevel free?

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

### Which has better reviews, SmarterNoise or ZenLevel?

ZenLevel is rated higher. SmarterNoise averages 4.6 out of 5 from 118 ratings, while ZenLevel averages 5.0 from 1 ratings.

### Do SmarterNoise or ZenLevel have ads?

SmarterNoise shows ads; ZenLevel does not.

### Which is updated more often, SmarterNoise or ZenLevel?

SmarterNoise ships an update every 6 weeks, and ZenLevel every 5 months. Most recently, SmarterNoise was updated on November 2, 2026 and ZenLevel on October 31, 2026.

---

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