O vs March BMS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
O
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.
- Real-time video monitoring
- Cloud storage playback
- Alarm push notifications
- Two-way voice intercom
- Photo and video capture
- Simple operation and design
Read full descriptionHide full description
O-KAM Pro, feel home anytime, anywhere. A remote video surveillance software used with the camera can help you check the dynamics of your home at any time after adding the camera. With real-time video, cloud storage playback, alarm push, two-way voice intercom, as well as photo and video and other functions. APP has simple operation and simple design, which can help you manage and use it more conveniently.
March BMS
Read full descriptionHide full description
一款专门为电池保护板开发的APP，主要用来读取锂电池各串电池电压，充放电电流、保护状态，以及电池保护板的参数设置功能，让用户能够清晰的了解电池的状态，保障电池的使用安全。通过加入仪表板、电量、温度显示等功能，让用户更好的了解状态。
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | O | March BMS |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (8.6K ratings) — better | — |
| Positive reviews | 62.8% of reviews | — |
| Number of ratings | 8.6K — better | — |
| Update frequency | Fortnightly | Fortnightly |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Best chart rank | #6 — better | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 | 9.0 — better |
| Further details — not scored | ||
| Size | 366 MB | 26 MB |
| Age rating | 17+ | 4+ |
| Developer | Shenzhen VeePai IoT Intelligent Technology LLC | 杰 王 |
Bugs and requests
O
Reported bugs
3 issues- Frequent app crashes
- Inability to view recorded footage
- Inconsistent camera performance after updates
Requested features
5 requests- Easier cloud storage management
- Improved motion detection sensitivity
- More customization options
- Ability to disable microphone/speakers
- Smoother app performance
March BMS
Not enough reviews yet to summarise bugs or requests.
In-app purchases
O
- monthly card-7(SA tryout)$0.99
- monthly card-7(tryout)$0.99
- monthly card-7(EU tryout)$0.99
Show 20 moreShow fewer
- monthly card-7(JP tryout)$0.99
- monthly card-7(AE tryout)$0.99
- monthly card$1.99
- monthly card2 variants$2.99
- monthly card(JP)-7$2.99
- monthly card- 7$3.99
- monthly card- 30$4.99
- monthly card2 variants$5.99
- monthly card(JP)- 30$5.99
- monthly card(SA)- 30$5.99
- half year card$6.99
- monthly card(AE)-30$7.99
- yearly card$12.99
- half year card$14.99
- yearly card$24.99
- half year card -7$28.99
- half year card$31.99
- yearly card$49.99
- yearly card - 7$49.99
- half year card -30$74.99
March BMS
No in-app purchases
