# Simtek Sensors vs Vaultek ViSN

The clearest difference is review sentiment: Simtek Sensors at 100% against Vaultek ViSN's 33%. Simtek Sensors also leads on rating (4.9 vs 2.3) and in-app purchases (none vs 1). Vaultek ViSN's advantage is ads (none vs shown) and iOS requirement (13.0 vs 16.0). On price, ratings volume and device support there is nothing between them.

Both are free to download. Vaultek ViSN sells 1 in-app purchase, starting at $4.99 per month. Simtek Sensors asks for nothing beyond the download.

Simtek Sensors holds the better App Store score, 4.9 against 2.3. Both are backed by a comparable volume of ratings — 7 and 20 respectively. Written reviews point the same way: 100% of Simtek Sensors's written reviews are positive against 33% of Vaultek ViSN's.

Simtek Sensors ships an update every 5 weeks, Vaultek ViSN every 3 months. Both last shipped on November 2, 2026.

## The numbers

| Metric | Simtek Sensors | Vaultek ViSN |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (7 ratings)](https://appshunter.io/ios/app/simtek-sensors/id1261698660/reviews)** | [2.3 (20 ratings)](https://appshunter.io/ios/app/vaultek-visn/id6670317613/reviews) |
| Number of ratings | 7 | **20** |
| Positive reviews | **100.0% of reviews** | 33.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 5 weeks** | Every 3 months |
| Monetization | **Ad-supported** | Freemium |
| Size | 7 MB | 20 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Simtek, Inc.](https://appshunter.io/developer/1261698659) | [Vaultek Safe, Inc.](https://appshunter.io/developer/1406658583) |

## What reviewers say

### Simtek Sensors

[App page](https://appshunter.io/ios/app/simtek-sensors/id1261698660)

Monitor remote locations without Wi-Fi or power. Receive instant alerts on your phone when a sensor is triggered, enhancing security and peace of mind. Features include customizable messages, alert history, and low battery notifications.

**Highlights:** Remote space monitoring without Wi-Fi, Instant phone alerts (approx. 20 seconds), Customizable alert messages, Alert history tracking, Low battery notifications, Signal strength and battery status

**Features:** macOS Compatibility

**In-app purchases:** none


### Vaultek ViSN

[App page](https://appshunter.io/ios/app/vaultek-visn/id6670317613)

Control and monitor your Wi-Fi enabled safe remotely. Effortlessly set up your device, manage user access with fingerprints and temporary passcodes, and receive real-time alerts for critical activity. Upgrade for advanced features like SOS alerts and multi-safe management.

**Highlights:** Wi-Fi enabled safe network, User-friendly guided setup, Real-time critical activity alerts, Program up to 80 fingerprints, Temporary passcode generation, SOS emergency alerts (premium), Over-the-air firmware updates

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ViSN Premium Subscription | $4.99 | per month |


## Frequently asked questions

### Is Simtek Sensors free?

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

### Is Vaultek ViSN free?

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

### Which has better reviews, Simtek Sensors or Vaultek ViSN?

Simtek Sensors is rated higher. Simtek Sensors averages 4.9 out of 5 from 7 ratings, while Vaultek ViSN averages 2.3 from 20 ratings.

### Do Simtek Sensors or Vaultek ViSN have ads?

Simtek Sensors shows ads; Vaultek ViSN does not.

### Which is updated more often, Simtek Sensors or Vaultek ViSN?

Simtek Sensors ships an update every 5 weeks, and Vaultek ViSN every 3 months. Most recently, Simtek Sensors was updated on November 2, 2026 and Vaultek ViSN on November 2, 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.*