# OpeNoise vs Spring printer

The clearest difference is update cadence: Spring printer at every 2 days against OpeNoise's every 7 months. OpeNoise's advantage is iOS requirement (15.0 vs 18.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

OpeNoise ships an update every 7 months, Spring printer every 2 days. The most recent releases landed on October 13, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | OpeNoise | Spring printer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/openoise/id1387499991/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 85.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 days** |
| Monetization | Free | — |
| Size | 12 MB | 2 MB |
| Requires iOS | **15.0** | 18.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Agenzia Regionale per la Protezione Ambientale del Piemonte](https://appshunter.io/developer/1317255035) | [SPRING s.r.l.](https://appshunter.io/developer/1499980148) |

## What reviewers say

### OpeNoise

[App page](https://appshunter.io/ios/app/openoise/id1387499991)

This application measures real-time sound pressure levels, displaying minimum and maximum values. It offers advanced analysis like third octave and FFT, with options to save data, calibrate, and share measurements with a community. Note: it is not intended for professional use.

**Highlights:** Real-time A-weighted sound pressure level measurement, Minimum and maximum level tracking, Third octave and FFT analysis, Data saving in text file, Calibration functionality, Measurements displayed on a map, Community sharing of calibration and measurements

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

**In-app purchases:** none


### Spring printer

[App page](https://appshunter.io/ios/app/spring-printer/id6739247541)

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

**In-app purchases:** none


## Frequently asked questions

### Is OpeNoise free?

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

### Is Spring printer free?

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

### Do OpeNoise or Spring printer have ads?

Neither OpeNoise nor Spring printer shows ads.

### Which is updated more often, OpeNoise or Spring printer?

OpeNoise ships an update every 7 months, and Spring printer every 2 days. Most recently, OpeNoise was updated on October 13, 2026 and Spring printer on October 8, 2026.

---

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