# PV Master vs myCistern IoT

The clearest difference is in-app purchases: myCistern IoT at none against PV Master's 4. PV Master's advantage is update cadence (every 8 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. PV Master sells 4 in-app purchases, starting at $4.99 per month. myCistern IoT asks for nothing beyond the download.

PV Master ships an update every 8 days, myCistern IoT every 3 weeks. The most recent releases landed on October 16, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | PV Master | myCistern IoT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (23 ratings)](https://appshunter.io/ios/app/pv-master-solar-panel-system/id396636193/reviews)** | — |
| Number of ratings | **23** | — |
| Positive reviews | 17.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 25 MB | 46 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [BigBalli Consulting llc](https://appshunter.io/developer/363765325) | [myCistern Operations GmbH](https://appshunter.io/developer/1767278005) |

## What reviewers say

### PV Master

[App page](https://appshunter.io/ios/app/pv-master-solar-panel-system/id396636193)

This app helps you harness solar energy by providing accurate solar data, weather integration, and tools to optimize your solar panel setup. It offers comprehensive calculators for energy needs, panel requirements, and battery storage, along with guides and a glossary for informed decisions.

**Highlights:** Accurate solar data based on location, Weather data integration, Solar potential insights, Panel positioning tool, Comprehensive energy calculators, Guides, FAQs, and glossary

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Unlock | $4.99 | per month |
| Yearly | $49.99 | per year |
| Location Solar Panel Data | $0.99 | one-time |
| Lifetime | $59.99 | one-time |


### myCistern IoT

[App page](https://appshunter.io/ios/app/mycistern-iot/id6770515422)

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

**In-app purchases:** none


## Frequently asked questions

### Is PV Master free?

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

### Is myCistern IoT free?

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

### Do PV Master or myCistern IoT have ads?

Neither PV Master nor myCistern IoT shows ads.

### Which is updated more often, PV Master or myCistern IoT?

PV Master ships an update every 8 days, and myCistern IoT every 3 weeks. Most recently, PV Master was updated on October 16, 2026 and myCistern IoT on October 7, 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.*