# My Visonic SMS vs Engineer's Unit Converter

The clearest difference is price: Engineer's Unit Converter at Free against My Visonic SMS's $0.99. Engineer's Unit Converter also leads on update cadence (monthly vs every 4 months). My Visonic SMS's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support there is nothing between them.

Engineer's Unit Converter is free to download; My Visonic SMS costs $0.99 up front. Engineer's Unit Converter sells 1 one-off in-app purchase. My Visonic SMS asks for nothing beyond the download.

My Visonic SMS ships an update every 4 months, Engineer's Unit Converter monthly. The most recent releases landed on October 8, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | My Visonic SMS | Engineer's Unit Converter |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Monthly** |
| Monetization | Paid | — |
| Size | 2 MB | 7 MB |
| Requires iOS | **9.2** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Neelu Jalori](https://appshunter.io/developer/1085443796) | [Jose Gerardo Palma Duran](https://appshunter.io/developer/1873843788) |

## What reviewers say

### My Visonic SMS

[App page](https://appshunter.io/ios/app/my-visonic-sms/id1246113182)

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.

**Highlights:** Remote alarm system control via SMS, Arm/disarm system, Check system status, Receive in-app notifications, Control individual partitions, Password protected access

**Features:** Vision Pro support

**In-app purchases:** none


### Engineer's Unit Converter

[App page](https://appshunter.io/ios/app/engineers-unit-converter/id6758744042)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


## Frequently asked questions

### Is My Visonic SMS free?

My Visonic SMS costs $0.99, with no in-app purchases.

### Is Engineer's Unit Converter free?

Engineer's Unit Converter is free to download, with in-app purchases available.

### Do My Visonic SMS or Engineer's Unit Converter have ads?

Engineer's Unit Converter shows ads; My Visonic SMS does not.

### Which is updated more often, My Visonic SMS or Engineer's Unit Converter?

My Visonic SMS ships an update every 4 months, and Engineer's Unit Converter monthly. Most recently, My Visonic SMS was updated on October 8, 2026 and Engineer's Unit Converter on October 26, 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.*