# Spok Mobile vs UVDI

The clearest difference is rating: UVDI at 3.7 against Spok Mobile's 1.6. UVDI also leads on monetization model (free vs subscription) and update cadence (weekly vs every 4 months). Spok Mobile's advantage is ratings volume (144 vs 3) and review sentiment (10% vs 0%). 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.

UVDI holds the better App Store score, 3.7 against 1.6. That said, the two scores are not equally well evidenced: Spok Mobile has 144 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 10% of Spok Mobile's written reviews are positive against 0% of UVDI's, so the app with the better star average is not the one people write more warmly about.

Spok Mobile ships an update every 4 months, UVDI weekly. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Spok Mobile | UVDI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.6 (144 ratings)](https://appshunter.io/ios/app/spok-mobile/id418057657/reviews) | **[3.7 (3 ratings)](https://appshunter.io/ios/app/uvdi-360/id1516308479/reviews)** |
| Number of ratings | **144** | 3 |
| Positive reviews | **10.4% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | Subscription | **Free** |
| Size | 39 MB | 11 MB |
| Requires iOS | 15.0 | **12.4** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Spok, Inc.](https://appshunter.io/developer/418057660) | [ULTRAVIOLET DEVICES INC.](https://appshunter.io/developer/1059582785) |

## What reviewers say

### Spok Mobile

[App page](https://appshunter.io/ios/app/spok-mobile/id418057657)

This app facilitates critical messaging and alerting for professionals in healthcare, government, and public safety. It enables secure communication for urgent situations, with some features requiring a subscription to a supported system.

**Highlights:** Critical messaging, Alerting, Healthcare communication, Government communication, Public safety communication, Secure messaging

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

**In-app purchases:** none

**What reviewers like**

- 🔒 HIPAA-compliant secure messaging
- 📱 Eliminates need to carry physical pager
- 🌍 Works with Wi-Fi and cellular connectivity
- ✅ Messages generally deliver when functioning properly

**What reviewers complain about**

- 🐛 Frequent crashes and freezes
- 📳 Unreliable push notifications - requires opening app to receive alerts
- 🔊 Extremely loud audio alerts with no volume control
- 🎨 Outdated, clunky user interface from 1990s-2000s era
- ⏰ Inconsistent notification timing and delivery delays

**Reported bugs**

- App crashes on startup or when opening messages
- Push notifications fail to deliver unless app is open
- Audio settings revert to high volume automatically
- Status switcher disappeared after iOS updates
- Alerts continue after message is opened

**Requested features**

- Apple Watch support with message preview
- Customizable alert tones and volume control
- Ability to mute/silence pager independently from phone
- Copy and paste functionality within messages
- Search function for messages


### UVDI

[App page](https://appshunter.io/ios/app/uvdi-360/id1516308479)

Control and monitor a UV room sanitizing system remotely. This app uses Bluetooth to communicate with the device, allowing you to start, stop, and upload cleaning cycle data to the cloud for analysis. Maximize your investment in ultraviolet technology with smart data reporting.

**Highlights:** Remote cycle status and start-up, Bluetooth Low Energy data download, Cloud-based data reporting, Background cycle tracking, UVDI-360 Room Sanitizer System control

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Spok Mobile free?

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

### Is UVDI free?

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

### Which has better reviews, Spok Mobile or UVDI?

UVDI is rated higher. Spok Mobile averages 1.6 out of 5 from 144 ratings, while UVDI averages 3.7 from 3 ratings.

### Do Spok Mobile or UVDI have ads?

Neither Spok Mobile nor UVDI shows ads.

### Which is updated more often, Spok Mobile or UVDI?

Spok Mobile ships an update every 4 months, and UVDI weekly. Most recently, Spok Mobile was updated on November 1, 2026 and UVDI on November 3, 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.*