OpeNoise vs iForum
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OpeNoise
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.
- 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
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OpeNoise is a real-time noise level meter. TECHNICAL SPECIFICATIONS: - Real-time A-weighted sound pressure level measurement - Minimum and maximum level - Third octave and FFT analysis - Data saving in text file - Calibration - Displaying measurements on a map - Metadata compilation - Sharing calibration and measurements with the OpeNoise community TERM OF USE This app is not intended for professional use, it does not necessarily guarantee an accurate noise measurement. Since each device has a different response to noise, a comparison with a professional noise level meter in the measurement dynamic range is required. The utilization of the app requires adequate technical knowledge and skill; an extemporary measurement might not be correct. The calibrations and measurements sent to the OpeNoise community will be used for statistical purposes only and cannot be used in any way to verify compliance with legal limits. CREDITS Developers: Arpa Piemonte (Regional Agency for the Protection of the Environment of Piedmont - Italy - www.arpa.piemonte.it). The code is open source under GNU v.2 license or later, the code is on GitHub: https://github.com/Arpapiemonte/ KEYWORDS noise level meter, level, sound, noise, measure, measurement, dB, db, dBA, dB(A), decibel
iForum
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SIMPLICITY OF ACCESS AND COMFORT OF THE SPACES iForum APP allows our customers direct access to the iForum Building (24-7 iForum Building access). The app is reserved exclusively for members, therefore it is necessary to have an account and become a member of the iForum community. iForum is an exclusive space located in the heart of Rome, an innovative "forum" where customers, iCitizens, can work, make digital culture or meet Digital Stars, companies specialized in the digital technology sector. A new building with 4 floors of workspaces, a comfortable environment surrounded by greenery, and a generous amount of natural light thanks to the large floor-to-ceiling windows and a terrace overlooking the city. The iForum app also allows you to access convenient covered parking spaces. The building is located in a strategic position, a stone's throw from the Aurelian Walls, easily accessible, and well connected by public transport. FLEXIBILITY AND EFFICIENCY iForum APP allows you to book and access workstations in coworking spaces and private offices with 2, 4 or 6 workstations, adaptable to your needs, versatile and multifunctional, with high levels of service on flexible contracts. The advanced wi-fi network guarantees a high-performance Internet connection, direct streaming, webinars, and videoconferences, without bandwidth or security problems of any kind. SERVICES AND NETWORKING iForum APP offers the possibility to use iForum services including the booking of Meeting rooms & Event spaces. iForum has an Auditorium and a meeting room that can be configured to allow for different layouts and capacities. Demo rooms and state-of-the-art digital infrastructures allow showcases and demos to present new products, services, or digital solutions, propose and test new business models in real-time, and communicate. Versatile event spaces, indoors and outdoors, are designed to enrich the iForum experience, engage customers, and foster partner networking.
Screenshots
Verdict
OpeNoise and iForum are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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, iForum every 8 months. The most recent releases landed on October 13, 2026 and October 4, 2026 respectively.
| Parameter | OpeNoise | iForum |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (4 ratings) — better | — |
| Positive reviews | 85.7% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 7 months — better | Every 8 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 12 MB | 92 MB |
| Age rating | 4+ | 4+ |
| Developer | Arpa Piemonte | Sofia SRL |
In-app purchases
OpeNoise
No in-app purchases
iForum
No in-app purchases









