# ONE Device vs O

The clearest difference is in-app purchases: ONE Device at none against O's 25. ONE Device also leads on ads (none vs shown). O's advantage is ratings volume (8.6K vs 4) and rating (4.5 vs 4.3). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. O sells 23 one-off in-app purchases. ONE Device asks for nothing beyond the download.

O holds the better App Store score, 4.5 against 4.3. That said, the two scores are not equally well evidenced: O has 8.6K ratings behind it against 4, so its average is the more settled of the two.

ONE Device ships an update monthly, O fortnightly. The most recent releases landed on October 27, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | ONE Device | O |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (4 ratings)](https://appshunter.io/ios/app/one-device/id1558929605/reviews) | **[4.5 (8.6K ratings)](https://appshunter.io/ios/app/o-kam-pro/id1602054864/reviews)** |
| Number of ratings | 4 | **8.6K** |
| Positive reviews | — | 62.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Best chart rank | — | **#7** |
| Size | 3 MB | 366 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [ONE TECH, INC](https://appshunter.io/developer/1533900933) | [Shenzhen VeePai IoT Intelligent Technology LLC](https://appshunter.io/developer/557459166) |

## What reviewers say

### ONE Device

[App page](https://appshunter.io/ios/app/one-device/id1558929605)

This application facilitates a connection between your wireless device and a cloud platform. It offers feedback during the activation process, ensuring seamless integration.

**Highlights:** Device-to-cloud connectivity, Activation process feedback, Wireless device integration, Cloud platform synchronization

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

**In-app purchases:** none


### O

[App page](https://appshunter.io/ios/app/o-kam-pro/id1602054864)

**Currently charting:** #7 Top Free · Developer Tools, #15 Top Grossing · Developer Tools (US App Store)

Monitor your home remotely with real-time video surveillance. Access cloud storage, receive alarm notifications, and communicate via two-way audio. Capture photos and videos for convenient home management.

**Highlights:** Real-time video monitoring, Cloud storage playback, Alarm push notifications, Two-way voice intercom, Photo and video capture, Simple operation and design

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

**In-app purchases (23)**

| Purchase | Price | Billing |
| --- | --- | --- |
| monthly card-7(SA tryout) | $0.99 | one-time |
| monthly card-7(tryout) | $0.99 | one-time |
| monthly card-7(EU tryout) | $0.99 | one-time |
| monthly card-7(JP tryout) | $0.99 | one-time |
| monthly card-7(AE tryout) | $0.99 | one-time |
| monthly card | $1.99 | one-time |
| monthly card | $2.99 | one-time |
| monthly card(JP)-7 | $2.99 | one-time |
| monthly card- 7 | $3.99 | one-time |
| monthly card- 30 | $4.99 | one-time |
| monthly card | $5.99 | one-time |
| monthly card(JP)- 30 | $5.99 | one-time |
| monthly card(SA)- 30 | $5.99 | one-time |
| half year card | $6.99 | one-time |
| monthly card(AE)-30 | $7.99 | one-time |
| yearly card | $12.99 | one-time |
| half year card | $14.99 | one-time |
| yearly card | $24.99 | one-time |
| half year card -7 | $28.99 | one-time |
| half year card | $31.99 | one-time |
| yearly card | $49.99 | one-time |
| yearly card - 7 | $49.99 | one-time |
| half year card -30 | $74.99 | one-time |

**What reviewers like**

- 🚀 Convenient
- 🚀 Easy to use
- 🚀 Great picture quality
- 🚀 Excellent value
- 🚀 Reliable

**What reviewers complain about**

- 🐛 Connectivity issues
- 🐛 Unreliable motion detection
- 🔋 Battery life concerns
- 🔍 Difficult to navigate app
- 💸 Expensive subscription

**Reported bugs**

- Frequent app crashes
- Inability to view recorded footage
- Inconsistent camera performance after updates

**Requested features**

- Easier cloud storage management
- Improved motion detection sensitivity
- More customization options
- Ability to disable microphone/speakers
- Smoother app performance


## Frequently asked questions

### Is ONE Device free?

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

### Is O free?

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

### Which has better reviews, ONE Device or O?

O is rated higher. ONE Device averages 4.3 out of 5 from 4 ratings, while O averages 4.5 from 8.6K ratings.

### Do ONE Device or O have ads?

O shows ads; ONE Device does not.

### Which is updated more often, ONE Device or O?

ONE Device ships an update monthly, and O fortnightly. Most recently, ONE Device was updated on October 27, 2026 and O on October 29, 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.*