# sonnen vs E

The clearest difference is iOS requirement: E at 11.0 against sonnen's 15.1. 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.

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on October 14, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | sonnen | E |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (20 ratings)](https://appshunter.io/ios/app/sonnen/id6444147829/reviews)** | — |
| Number of ratings | **20** | — |
| Positive reviews | 37.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | Fortnightly |
| Monetization | Free | — |
| Size | 66 MB | 36 MB |
| Requires iOS | 15.1 | **11.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [sonnen GmbH](https://appshunter.io/developer/547979417) | [iPotisEdge Co., Ltd.](https://appshunter.io/developer/1694497266) |

## What reviewers say

### sonnen

[App page](https://appshunter.io/ios/app/sonnen/id6444147829)

Manage your clean energy supply from anywhere. Monitor your solar PV system, battery, and EV charger in real-time. Gain insights into energy consumption and generation to optimize your usage and prepare for outages.

**Highlights:** Real-time energy data and insights, Monitor solar PV system performance, Track battery and EV charger status, View live energy flow and consumption, Access energy contract details, Set battery backup buffer

**Features:** Vision Pro support

**In-app purchases:** none


### E

[App page](https://appshunter.io/ios/app/e-potis/id6464381754)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is sonnen free?

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

### Is E free?

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

### Do sonnen or E have ads?

Neither sonnen nor E shows ads.

### Which is updated more often, sonnen or E?

sonnen ships an update fortnightly, and E fortnightly. Most recently, sonnen was updated on October 14, 2026 and E on October 3, 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.*