# BMS vs PV Calculator.

The clearest difference is rating: PV Calculator. at 5.0 against BMS's 4.3. PV Calculator. also leads on iOS requirement (13.0 vs 15.0). BMS's advantage is in-app purchases (none vs 1) and update cadence (every 6 weeks vs every 7 months). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. PV Calculator. sells 1 one-off in-app purchase. BMS asks for nothing beyond the download.

PV Calculator. holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 3 and 2 respectively.

BMS ships an update every 6 weeks, PV Calculator. every 7 months. The most recent releases landed on November 14, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | BMS | PV Calculator. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (3 ratings)](https://appshunter.io/ios/app/bms-tool/id6471949475/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/pv-calculator/id6758427564/reviews)** |
| Number of ratings | **3** | 2 |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 7 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 40 MB | 52 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [秀丽 唐](https://appshunter.io/developer/1715570419) | [Nanjibhai Gorasiya](https://appshunter.io/developer/1834066312) |

## What reviewers say

### BMS

[App page](https://appshunter.io/ios/app/bms-tool/id6471949475)

Monitor and manage your device's battery health with real-time data, historical records, and customizable alerts for over-charge, over-discharge, and temperature. Connect locally via Bluetooth or remotely via Wi-Fi to track battery status, cell performance, and potential issues.

**Highlights:** Real-time battery data (current, voltage, SOC, SOH), Cell-level monitoring, Historical alarm and protection records, Customizable warning values, Bluetooth and Wi-Fi connectivity, Device sharing and management

**In-app purchases:** none


### PV Calculator.

[App page](https://appshunter.io/ios/app/pv-calculator/id6758427564)

This tool simplifies solar photovoltaic system design and analysis for professionals and students. It offers a comprehensive Energy Hub with multiple calculators, providing instant results, visual charts, and clear insights for efficient PV system planning and optimization.

**Highlights:** Energy Hub with multiple solar calculators, Calculate solar panel power output, Analyze energy generation (daily, monthly, yearly), Design solar array size, Calculate system voltage and configuration, Instant calculation results, Visual charts and performance summaries

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime premium | $9.99 | one-time |


## Frequently asked questions

### Is BMS free?

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

### Is PV Calculator. free?

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

### Which has better reviews, BMS or PV Calculator.?

PV Calculator. is rated higher. BMS averages 4.3 out of 5 from 3 ratings, while PV Calculator. averages 5.0 from 2 ratings.

### Do BMS or PV Calculator. have ads?

Neither BMS nor PV Calculator. shows ads.

### Which is updated more often, BMS or PV Calculator.?

BMS ships an update every 6 weeks, and PV Calculator. every 7 months. Most recently, BMS was updated on November 14, 2026 and PV Calculator. on November 5, 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.*