# Monitor Delfos vs Solar Quality Summit

The clearest difference is ads: Monitor Delfos at none against Solar Quality Summit's shown. Monitor Delfos also leads on device support (3 vs 1) and iOS requirement (13.4 vs 16.0). Solar Quality Summit's advantage is update cadence (weekly vs every 5 weeks). On price 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.

Monitor Delfos ships an update every 5 weeks, Solar Quality Summit weekly. The most recent releases landed on September 11, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Monitor Delfos | Solar Quality Summit |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 5 weeks | **Weekly** |
| Size | 44 MB | 175 MB |
| Requires iOS | **13.4** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [DELFOS SERVICOS INTELIGENTES LTDA](https://appshunter.io/developer/1324020043) | [SolarPower Europe](https://appshunter.io/developer/1442501418) |

## What reviewers say

### Monitor Delfos

[App page](https://appshunter.io/ios/app/monitor-delfos/id6480925466)

**Features:** macOS Compatibility

**In-app purchases:** none


### Solar Quality Summit

[App page](https://appshunter.io/ios/app/solar-quality-summit/id6739429598)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Monitor Delfos free?

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

### Is Solar Quality Summit free?

Solar Quality Summit is free to download, with no in-app purchases.

### Do Monitor Delfos or Solar Quality Summit have ads?

Solar Quality Summit shows ads; Monitor Delfos does not.

### Which is updated more often, Monitor Delfos or Solar Quality Summit?

Monitor Delfos ships an update every 5 weeks, and Solar Quality Summit weekly. Most recently, Monitor Delfos was updated on September 11, 2026 and Solar Quality Summit on September 10, 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.*