My Visonic SMS vs Noise Calc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
My Visonic SMS
Remotely manage your Tyco/Johnsons alarm systems via SMS. Arm, disarm, check status, and receive instant notifications for alarms and alerts from anywhere in the world. Supports multiple panels and partitions with password protection.
- Remote alarm system control via SMS
- Arm/disarm system
- Check system status
- Receive in-app notifications
- Control individual partitions
- Password protected access
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Control and monitor your PowerMax/PowerG Tyco/Johnsons alarm systems from anywhere using SMS. With this App you can access your PowerMax panels from home or work or from anywhere in the world using your mobile phone. With this App you can: - Arm the system in home or away mode - Disarm the system - Check the current status of the system - Receive in-App messages (local push notifications) of alarms and alerts - Shows the live alarm status in case of an alarm/Arm Home/Arm Away/Disarm. - Rings the default ring tone of your mobile in case of alarms and critical alerts - Control individual partitions (up to 4) if the panel has been configured. - Control up to 2 panels with or without partitions. - Password protected with the same code that you use to disarm the alarm panel. Pre-requisite: To access the PowerMax/PowerG alarm system from outside the premises using SMS, your security service installer should have installed a GSM module inside the alarm panel and the GSM SIM card should have sufficient subscription/balance to send and receive SMSs. To download “My Visonic” User Manual Click here: http://visonic.in/wp-content/uploads/2016/04/My-Visonic-SMS-User-Guide.pdf
Noise Calc
This calculator estimates outdoor and semi-reverberant noise levels. It's designed for acoustic technicians and professionals dealing with machine noise, offering tools for logarithmic summation and difference, sound pressure attenuation, and noise reduction from barriers.
- Logarithmic summation of decibels
- Logarithmic difference in decibels
- Sound pressure attenuation with distance
- Free-field sound propagation
- Sound-insulating barrier noise reduction
- Outdoor machinery noise compliance estimation
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Noise Calc is a calculator designed to quickly estimate noise levels in outdoor environments and semi-reverberant fields. It is a useful tool for acoustic technicians in the field, as well as for other professionals dealing with machine noise. We have specifically designed a section for those who design and install heat pumps, air handling units (AHUs), chillers, and other noisy outdoor machinery. The first section performs logarithmic summation in decibels: this is useful, for example, when multiple machines are nearby, and their known sound energy levels need to be summed (dB values must be added with dB, or dBA with dBA; sound power levels (Lw) can be summed together; sound pressure levels (Lp) can also be summed, but only if measured at the same distance from the source). The second section performs a logarithmic difference in decibels: this is useful when the ambient pressure level and residual pressure level are known, helping to determine the energy level of the sound source at a given point. The third section evaluates sound pressure attenuation with distance: if the pressure level (Lp) in decibels is known at distance d1, the result at d2 can be estimated (however, measurements taken with a phone should be avoided, and care must be taken to ensure that d1 is not too close to the source and that d2 is not affected by sound reflections). The fourth section evaluates sound propagation in free-field conditions, considering the sound power level (Lw) of the source and whether it is near one, two, or three surfaces (excluding reflections from other objects). The fifth section estimates the noise reduction effect of a sound-insulating barrier. It performs a simplified frequency-by-frequency calculation and returns the number of decibels by which the noise will be reduced (if the frequency is unknown, 500 Hz is typically used). The sixth section is particularly useful for technicians and installers of outdoor machinery. Given the data from the technical sheet (either power or pressure at the manufacturer-declared distance), the machine's position near one or more surfaces, and the distance to the nearest neighbor's window, the app will indicate whether there are significant issues in complying with municipal noise zoning regulations). The seventh section allows for a differential limit calculation. The eighth section evaluates sound propagation in a semi-reverberant field.
Screenshots
Verdict
The clearest difference is price: Noise Calc at Free against My Visonic SMS's $0.99. My Visonic SMS's advantage is update cadence (every 4 months vs every 11 months) and iOS requirement (9.2 vs 15.1). On ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Noise Calc is free to download; My Visonic SMS costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
My Visonic SMS ships an update every 4 months, Noise Calc every 11 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.
| Parameter | My Visonic SMS | Noise Calc |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | — | 1.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | — | 1 — better |
| Update frequency | Every 4 months — better | Every 11 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 9.2 — better | 15.1 |
| Further details — not scored | ||
| Size | 2 MB | 39 MB |
| Age rating | 4+ | 4+ |
| Developer | Neelu Jalori | Lorenzo Rizzi |
Customer experience
My Visonic SMS
Noise Calc
In-app purchases
My Visonic SMS
No in-app purchases
Noise Calc
No in-app purchases
Questions
Is My Visonic SMS free?
Is Noise Calc free?
Do My Visonic SMS or Noise Calc have ads?
Which is updated more often, My Visonic SMS or Noise Calc?
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