# Effy Pro vs Watt Audit

The clearest difference is update cadence: Effy Pro at weekly against Watt Audit's every 2 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Effy Pro ships an update weekly, Watt Audit every 2 weeks. The most recent releases landed on September 10, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Effy Pro | Watt Audit |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | Free | — |
| Size | 60 MB | 155 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Quelle Energie](https://appshunter.io/developer/588695232) | [Watt Audit](https://appshunter.io/developer/1690904012) |

## What reviewers say

### Effy Pro

[App page](https://appshunter.io/ios/app/effy-pro/id1454493946)

This app helps energy renovation professionals manage client subsidies. It allows users to simulate subsidy amounts and submit client requests before signing quotes, streamlining the process and potentially increasing business. It's designed for RGE-certified professionals in the energy efficiency sector.

**Highlights:** Client subsidy management, Subsidy amount simulation, Client request submission, Streamlined quote process, Supports energy renovation professionals, Facilitates Prime Effy benefits

**Features:** Vision Pro support

**In-app purchases:** none


### Watt Audit

[App page](https://appshunter.io/ios/app/watt-audit/id6449857114)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Effy Pro free?

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

### Is Watt Audit free?

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

### Do Effy Pro or Watt Audit have ads?

Neither Effy Pro nor Watt Audit shows ads.

### Which is updated more often, Effy Pro or Watt Audit?

Effy Pro ships an update weekly, and Watt Audit every 2 weeks. Most recently, Effy Pro was updated on September 10, 2026 and Watt Audit on September 15, 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.*