# Supervision Online vs SmarterNoise

The clearest difference is in-app purchases: Supervision Online at none against SmarterNoise's 2. Supervision Online also leads on ads (none vs shown). SmarterNoise's advantage is update cadence (every 6 weeks vs every 5 months). On price, device support and iOS requirement there is nothing between them.

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

Supervision Online ships an update every 5 months, SmarterNoise every 6 weeks. The most recent releases landed on September 10, 2026 and August 11, 2026 respectively.

## The numbers

| Metric | Supervision Online | SmarterNoise |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (115 ratings)](https://appshunter.io/ios/app/smarternoise/id1384299042/reviews)** |
| Number of ratings | — | **115** |
| Positive reviews | — | 75.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 6 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 12 MB | 27 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Astacus AB](https://appshunter.io/developer/1282150918) | [Johan Rogard](https://appshunter.io/developer/1384299041) |

## What reviewers say

### Supervision Online

[App page](https://appshunter.io/ios/app/supervision-online/id504172584)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Supervision Online free?

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

### Is SmarterNoise free?

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

### Do Supervision Online or SmarterNoise have ads?

SmarterNoise shows ads; Supervision Online does not.

### Which is updated more often, Supervision Online or SmarterNoise?

Supervision Online ships an update every 5 months, and SmarterNoise every 6 weeks. Most recently, Supervision Online was updated on September 10, 2026 and SmarterNoise on August 11, 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.*