# PV Calculator. vs Controller Pro for SoundTouch

The clearest difference is price: PV Calculator. at Free against Controller Pro for SoundTouch's $3.99. PV Calculator. also leads on iOS requirement (13.0 vs 15.0). Controller Pro for SoundTouch's advantage is in-app purchases (none vs 1) and update cadence (every 4 days vs every 7 months). On rating, ratings volume, ads and device support there is nothing between them.

PV Calculator. is free to download; Controller Pro for SoundTouch costs $3.99 up front. PV Calculator. sells 1 one-off in-app purchase. Controller Pro for SoundTouch asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for PV Calculator. against 5.0 for Controller Pro for SoundTouch. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

PV Calculator. ships an update every 7 months, Controller Pro for SoundTouch every 4 days. The most recent releases landed on October 17, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | PV Calculator. | Controller Pro for SoundTouch |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/pv-calculator/id6758427564/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/controller-pro-for-soundtouch/id6762059088/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | — | 38.5% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 4 days** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 52 MB | 16 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nanjibhai Gorasiya](https://appshunter.io/developer/1834066312) | [John Why](https://appshunter.io/developer/1892701294) |

## What reviewers say

### 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 |


### Controller Pro for SoundTouch

[App page](https://appshunter.io/ios/app/controller-pro-for-soundtouch/id6762059088)

This app provides cloud-independent control for legacy SoundTouch speakers, offering direct Wi-Fi communication for features like volume, grouping, and media playback. It enables local NAS streaming, internet radio via Bluetooth, and custom hardware button mapping, ensuring your speakers remain functional without relying on external servers.

**Highlights:** Local Wi-Fi control, NAS and media streaming, Built-in web radio, Hardware preset mapping, Stereo pair support, Multi-room audio grouping, Deep hardware controls

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

**In-app purchases:** none


## Frequently asked questions

### Is PV Calculator. free?

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

### Is Controller Pro for SoundTouch free?

Controller Pro for SoundTouch costs $3.99, with no in-app purchases.

### Which has better reviews, PV Calculator. or Controller Pro for SoundTouch?

PV Calculator. and Controller Pro for SoundTouch are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do PV Calculator. or Controller Pro for SoundTouch have ads?

Neither PV Calculator. nor Controller Pro for SoundTouch shows ads.

### Which is updated more often, PV Calculator. or Controller Pro for SoundTouch?

PV Calculator. ships an update every 7 months, and Controller Pro for SoundTouch every 4 days. Most recently, PV Calculator. was updated on October 17, 2026 and Controller Pro for SoundTouch on October 21, 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.*