# Meter Inside vs OnSun

The clearest difference is in-app purchases: Meter Inside at none against OnSun's 2. Meter Inside also leads on iOS requirement (9.0 vs 16.0). On price, ads and device support there is nothing between them.

Both are free to download. OnSun sells 2 in-app purchases, starting at $2.99 per month. Meter Inside asks for nothing beyond the download.

## The numbers

| Metric | Meter Inside | OnSun |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 3 weeks |
| Monetization | Free | — |
| Size | 142 MB | 47 MB |
| Requires iOS | **9.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Landis+Gyr AG](https://appshunter.io/developer/1274495909) | [VIREO ENERGY PTY LTD](https://appshunter.io/developer/1874785734) |

## What reviewers say

### Meter Inside

[App page](https://appshunter.io/ios/app/meter-inside/id1485425899)

Explore a 3D digital twin of an ultrasonic heat meter using augmented reality. Rotate, disassemble, and learn about its technical features. Capture images and screenshots of the interactive model.

**Highlights:** 3D augmented reality model, Interactive meter exploration, Technical feature information, Rotate and disassemble, Camera and screenshot function, Language options (DE/EN)

**Features:** macOS Compatibility

**In-app purchases:** none


### OnSun

[App page](https://appshunter.io/ios/app/onsun-rooftop-solar-forecast/id6758746647)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $2.99 | per month |
| Pro | $24.99 | per year |


## Frequently asked questions

### Is Meter Inside free?

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

### Is OnSun free?

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

### Do Meter Inside or OnSun have ads?

Neither Meter Inside nor OnSun shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*