# DALY BMS vs Rotor

The clearest difference is price: DALY BMS at Free against Rotor's $2.99. DALY BMS also leads on update cadence (weekly vs every 3 weeks) and iOS requirement (13.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

DALY BMS is free to download; Rotor costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

DALY BMS ships an update weekly, Rotor every 3 weeks. The most recent releases landed on October 25, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | DALY BMS | Rotor |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[1.8 (12 ratings)](https://appshunter.io/ios/app/daly-bms/id6738759485/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 9.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 weeks |
| Monetization | Free | — |
| Size | 57 MB | 2 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [所兵 邱](https://appshunter.io/developer/1519230775) | [Matthew Mesropian](https://appshunter.io/developer/1854252282) |

## What reviewers say

### DALY BMS

[App page](https://appshunter.io/ios/app/daly-bms/id6738759485)

Monitor and manage your lithium battery's status. Query battery string information, identify and replace abnormal cells, and set safety parameters. Receive alerts for battery faults and track their occurrences.

**Highlights:** Unique Bluetooth name for accurate connection, Query battery string status, Identify and replace abnormal batteries, Set and read battery protection parameters, Monitor and display battery fault alarms

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

**In-app purchases:** none


### Rotor

[App page](https://appshunter.io/ios/app/rotor-vibration-analyzer/id6799832780)

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

**In-app purchases:** none


## Frequently asked questions

### Is DALY BMS free?

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

### Is Rotor free?

Rotor costs $2.99, with no in-app purchases.

### Do DALY BMS or Rotor have ads?

Neither DALY BMS nor Rotor shows ads.

### Which is updated more often, DALY BMS or Rotor?

DALY BMS ships an update weekly, and Rotor every 3 weeks. Most recently, DALY BMS was updated on October 25, 2026 and Rotor on October 26, 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.*