# BMS Tool vs KeyCard BBM

The clearest difference is rating: KeyCard BBM at 4.7 against BMS Tool's 3.9. KeyCard BBM also leads on ratings volume (1.6K vs 7) and review sentiment (84% vs 71%). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. BMS Tool sells 1 one-off in-app purchase and KeyCard BBM sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

KeyCard BBM holds the better App Store score, 4.7 against 3.9. That said, the two scores are not equally well evidenced: KeyCard BBM has 1.6K ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 71% of BMS Tool's written reviews are positive against 84% of KeyCard BBM's.

BMS Tool ships an update every 2 months, KeyCard BBM every 4 weeks. The most recent releases landed on September 16, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | BMS Tool | KeyCard BBM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (7 ratings)](https://appshunter.io/ios/app/bms-tool/id1511343379/reviews) | **[4.7 (1.6K ratings)](https://appshunter.io/ios/app/keycard-bbm/id6471354515/reviews)** |
| Number of ratings | 7 | **1.6K** |
| Positive reviews | 71.4% of reviews | **83.7% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 4 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 9 MB | 68 MB |
| Requires iOS | **15.2** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [e77code GmbH](https://appshunter.io/developer/1375405425) | [Marlon Milanes Rivero](https://appshunter.io/developer/1691214624) |

## What reviewers say

### BMS Tool

[App page](https://appshunter.io/ios/app/bms-tool/id1511343379)

Monitor your battery management systems via Bluetooth. Supports multiple BMS types including Liontron, XiaoXiang, ANT, and Wattstunde. Offers a screen always-on mode and macOS compatibility.

**Highlights:** Screen Always ON mode, Multiple BMS support, Liontron BMS read-only, XiaoXiang BMS read-only, ANT BMS read-only, Wattstunde LiFePo4 read-only, macOS support

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### KeyCard BBM

[App page](https://appshunter.io/ios/app/keycard-bbm/id6471354515)

Organize your digital cards, manage your cryptocurrency balance, and access digital services like gift cards and VPNs. This secure app offers a streamlined iOS experience with features like real-time balance management and instant digital product delivery.

**Highlights:** Digital card organization, KeyCoin balance management, Purchase digital products, Built-in VPN access, Secure sign-in options, QR code scanner

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Donation | $1.99 | one-time |

**What reviewers like**

- 💎 Excellent
- 💯 The best
- 👍 Great
- 🔑 KeyCard BBM
- 👌 Super app

**What reviewers complain about**

- 🐛 App crashes after update
- 🤔 Losing data after updates
- 🤨 Functionality issues with new updates
- 🔍 Missing features (e.g., online payments, Mi Transfer recharge)
- 🤯 Confusing UI changes between updates

**Reported bugs**

- QR code scanning not working
- Login with Apple ID not functioning
- App freezes after background operation
- Unable to fully register accounts

**Requested features**

- Add SMS confirmation for transfers
- Implement online payments
- Allow transferring from secondary Mi Transfer cards
- Add widget support for quick access
- Integrate NAUTA home payment


## Frequently asked questions

### Is BMS Tool free?

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

### Is KeyCard BBM free?

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

### Which has better reviews, BMS Tool or KeyCard BBM?

KeyCard BBM is rated higher. BMS Tool averages 3.9 out of 5 from 7 ratings, while KeyCard BBM averages 4.7 from 1.6K ratings.

### Do BMS Tool or KeyCard BBM have ads?

Both BMS Tool and KeyCard BBM show ads.

### Which is updated more often, BMS Tool or KeyCard BBM?

BMS Tool ships an update every 2 months, and KeyCard BBM every 4 weeks. Most recently, BMS Tool was updated on September 16, 2026 and KeyCard BBM on September 22, 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.*