# SolarViewer vs Watt Advisor

The clearest difference is iOS requirement: SolarViewer at 8.0 against Watt Advisor's 13.4. On price, update cadence, ads and in-app purchases there is nothing between them.

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

SolarViewer ships an update every 5 weeks, Watt Advisor every 6 weeks. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | SolarViewer | Watt Advisor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/watt-advisor/id6608980277/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 6 weeks |
| Monetization | — | Free |
| Size | 36 MB | 34 MB |
| Requires iOS | **8.0** | 13.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AsianPowerDevicesInc](https://appshunter.io/developer/1214788661) | [BreakSmart LLC](https://appshunter.io/developer/1761164384) |

## What reviewers say

### SolarViewer

[App page](https://appshunter.io/ios/app/solarviewer/id1462404751)

**Features:** macOS Compatibility

**In-app purchases:** none


### Watt Advisor

[App page](https://appshunter.io/ios/app/watt-advisor/id6608980277)

This app analyzes your energy usage to provide personalized advice on solar installation, energy plans, and home efficiency. It also monitors grid conditions and sends alerts for potential reliability issues. Optimize your energy consumption and save money with smart recommendations.

**Highlights:** Energy usage analysis, Solar calculator, Grid reliability alerts, Energy contract analysis, Home energy efficiency assessment, Smart device optimization

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SolarViewer free?

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

### Is Watt Advisor free?

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

### Do SolarViewer or Watt Advisor have ads?

Neither SolarViewer nor Watt Advisor shows ads.

### Which is updated more often, SolarViewer or Watt Advisor?

SolarViewer ships an update every 5 weeks, and Watt Advisor every 6 weeks. Most recently, SolarViewer was updated on October 7, 2026 and Watt Advisor on October 1, 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.*