# U vs SecuriKey

The clearest difference is review sentiment: SecuriKey at 100% against U's 50%. SecuriKey also leads on rating (4.2 vs 3.0) and update cadence (every 9 days vs every 2 months). U's advantage is iOS requirement (10.0 vs 16.6). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SecuriKey holds the better App Store score, 4.2 against 3.0. That said, the two scores are not equally well evidenced: SecuriKey has 11 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 50% of U's written reviews are positive against 100% of SecuriKey's.

U ships an update every 2 months, SecuriKey every 9 days. The most recent releases landed on October 12, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | U | SecuriKey |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/u-sync/id1485733488/reviews) | **[4.2 (11 ratings)](https://appshunter.io/ios/app/securikey-digital-door-man/id1566266183/reviews)** |
| Number of ratings | 1 | **11** |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | Free | Free |
| Size | 49 MB | 28 MB |
| Requires iOS | **10.0** | 16.6 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Universal Lighting System](https://appshunter.io/developer/1485568087) | [FRAMEWRK, Incorporated](https://appshunter.io/developer/1678913036) |

## What reviewers say

### U

[App page](https://appshunter.io/ios/app/u-sync/id1485733488)

Control your smart lighting system with this app. Set custom schedules for different zones, turn lights on/off manually, and name your zones for easy management. It's a convenient interface for Universal Lighting Systems' Zone Control transformers.

**Highlights:** Set zone schedules, Manual zone control, Name custom zones, Individual zone timing, System on/off control

**Features:** macOS Compatibility

**In-app purchases:** none


### SecuriKey

[App page](https://appshunter.io/ios/app/securikey-digital-door-man/id1566266183)

Transform any phone-based intercom into a smart access system. Generate temporary or one-time entry codes to enhance building security and manage guest access remotely. No hardware upgrades are required.

**Highlights:** Control intercoms remotely, Create temporary entry codes, Generate one-time use codes, No hardware upgrades needed, Receive entry alerts, Log entry history

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is U free?

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

### Is SecuriKey free?

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

### Which has better reviews, U or SecuriKey?

SecuriKey is rated higher. U averages 3.0 out of 5 from 1 ratings, while SecuriKey averages 4.2 from 11 ratings.

### Do U or SecuriKey have ads?

Neither U nor SecuriKey shows ads.

### Which is updated more often, U or SecuriKey?

U ships an update every 2 months, and SecuriKey every 9 days. Most recently, U was updated on October 12, 2026 and SecuriKey on October 18, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*