# O vs March BMS

The clearest difference is in-app purchases: March BMS at none against O's 25. March BMS also leads on iOS requirement (9.0 vs 13.0). O's advantage is chart position (#6 vs unranked). On price, update cadence, ads and device support there is nothing between them.

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

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | O | March BMS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (8.6K ratings)](https://appshunter.io/ios/app/o-kam-pro/id1602054864/reviews)** | — |
| Number of ratings | **8.6K** | — |
| Positive reviews | 62.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Fortnightly | Fortnightly |
| Monetization | Free with in-app purchases | — |
| Best chart rank | **#6** | — |
| Size | 366 MB | 26 MB |
| Requires iOS | 13.0 | **9.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Shenzhen VeePai IoT Intelligent Technology LLC](https://appshunter.io/developer/557459166) | [杰 王](https://appshunter.io/developer/1602653731) |

## What reviewers say

### O

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

**Currently charting:** #6 Top Free · Developer Tools, #9 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


### March BMS

[App page](https://appshunter.io/ios/app/march-bms/id1603395920)

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

**In-app purchases:** none


## Frequently asked questions

### Is O free?

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

### Is March BMS free?

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

### Do O or March BMS have ads?

Both O and March BMS show ads.

### Which is updated more often, O or March BMS?

O ships an update fortnightly, and March BMS fortnightly. Most recently, O was updated on November 1, 2026 and March BMS on October 30, 2026.

---

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