# UltraSync + vs Knog Mobile

The clearest difference is monetization model: Knog Mobile at free against UltraSync +'s free with in-app purchases. On price, rating, review sentiment and ratings volume there is nothing between them.

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

On the App Store both sit at effectively the same score — 2.3 for UltraSync + against 2.3 for Knog Mobile. Both are backed by a comparable volume of ratings — 58 and 52 respectively. Written reviews are what separate them: 17% of UltraSync +'s written reviews are positive against 20% of Knog Mobile's.

UltraSync + ships an update every 4 months, Knog Mobile every 2 months. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | UltraSync + | Knog Mobile |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (58 ratings)](https://appshunter.io/ios/app/ultrasync-plus/id1103085533/reviews) | **[2.3 (52 ratings)](https://appshunter.io/ios/app/knog-mobile/id1498719026/reviews)** |
| Number of ratings | **58** | 52 |
| Positive reviews | 17.5% of reviews | **19.6% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 65 MB | 26 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [UHS Pty Ltd](https://appshunter.io/developer/938015618) | [Knog Pty Ltd](https://appshunter.io/developer/917168361) |

## What reviewers say

### UltraSync +

[App page](https://appshunter.io/ios/app/ultrasync-plus/id1103085533)

Control your home security and automation systems remotely. Manage devices like cameras, lights, thermostats, and door locks from anywhere. Automate actions based on your location and create custom schedules for enhanced safety and convenience.

**Highlights:** Remote security system control, Live video monitoring, Smart lighting control, Door lock management, Thermostat adjustment, Location-based automation, Customizable schedules and scenes

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Works when set up correctly
- 👍 Useful for remote control
- 👍 Integrates cameras, alarms, Z-wave
- 👍 Automation is easy
- 👍 Reliable for some users

**What reviewers complain about**

- 🐛 Frequent login issues
- 🐛 App crashes often
- 🐛 Unreliable connection
- 🐛 Slow loading times
- 🐛 Outdated interface

**Reported bugs**

- Detectors not reconnecting after battery change
- Login failure state
- App crashes when alarm triggered
- Notifications for PIR sensor activation when alarm off
- "User logged in from another location" error

**Requested features**

- Add Siri/HomeKit/Google Home support
- Improve notification clarity and options
- Add a comprehensive help section
- Implement automatic session refresh
- Add quick actions to app icon


### Knog Mobile

[App page](https://appshunter.io/ios/app/knog-mobile/id1498719026)

This device acts as a bicycle alarm and tracker, integrating with Apple's Find My network. It alerts you to movement and helps locate your bike if it's moved.

**Highlights:** Bicycle alarm, Apple Find My network integration, Motion-sensitive alarm, USB-C rechargeable, 6-month battery life, Knog App control

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- ✅ Hardware design is sleek and discreet
- 🔍 Apple Find My integration works well
- 🎯 Alarm functionality effective when working
- 📦 Thoughtful packaging design
- 🔒 Good security concept for bikes

**What reviewers complain about**

- 🐛 App frequently crashes and freezes
- 🔌 Severe battery drain on iPhone
- 📱 Poor app stability and reliability
- 🔗 Constant connection/disconnection issues
- ⚠️ Alarm arm/disarm button often unresponsive

**Reported bugs**

- App crashes when arming/disarming alarm
- Device disappears from app after updates
- Cannot pair device after factory reset
- Bluetooth connection drops frequently
- Arm button appears as disarm and vice versa

**Requested features**

- Apple Watch app/companion app
- Siri Shortcuts integration
- Control Center widget for quick arm/disarm
- Home Screen widget for battery status
- Alarm sound preview feature


## Frequently asked questions

### Is UltraSync + free?

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

### Is Knog Mobile free?

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

### Which has better reviews, UltraSync + or Knog Mobile?

Knog Mobile is rated higher. UltraSync + averages 2.3 out of 5 from 58 ratings, while Knog Mobile averages 2.3 from 52 ratings.

### Do UltraSync + or Knog Mobile have ads?

Neither UltraSync + nor Knog Mobile shows ads.

### Which is updated more often, UltraSync + or Knog Mobile?

UltraSync + ships an update every 4 months, and Knog Mobile every 2 months. Most recently, UltraSync + was updated on October 24, 2026 and Knog Mobile on October 27, 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.*