# Solakon vs i

The clearest difference is update cadence: Solakon at every 5 days against i's every 4 months. Solakon also leads on device support (3 vs 1). i's advantage is monetization model (free vs free with in-app purchases) and review sentiment (100% vs 83%). On price, rating, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Solakon against 5.0 for i. Both are backed by a comparable volume of ratings — 7 and 3 respectively. Written reviews are what separate them: 83% of Solakon's written reviews are positive against 100% of i's.

Solakon ships an update every 5 days, i every 4 months. Both last shipped on October 30, 2026.

## The numbers

| Metric | Solakon | i |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (7 ratings)](https://appshunter.io/ios/app/solakon/id6478878569/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/i-kfz/id6742321547/reviews) |
| Number of ratings | **7** | 3 |
| Positive reviews | 83.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 4 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 130 MB | 67 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Solakon GmbH](https://appshunter.io/developer/1753223560) | [Kraftfahrt-Bundesamt](https://appshunter.io/developer/1797752881) |

## What reviewers say

### Solakon

[App page](https://appshunter.io/ios/app/solakon/id6478878569)

Harness solar energy easily from your balcony, garden, or flat roof. This app provides intuitive monitoring of your energy production and offers secure shipping and German-based support for a sustainable start.

**Highlights:** Easy solar energy generation, Intuitive energy monitoring, Quick setup and installation, Secure shipping and support, Long-term performance warranty

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### i

[App page](https://appshunter.io/ios/app/i-kfz/id6742321547)

Manage your vehicle registration documents digitally and securely. View, update, and share your registration certificate from your device, reducing paperwork and providing easy access to important vehicle data.

**Highlights:** Digital vehicle registration document (DFZ), Add DFZ via eID or QR code, Automatic updates and inspection reminders, Share registration documents securely, View vehicle data offline, Delete DFZ and shared versions

**In-app purchases:** none


## Frequently asked questions

### Is Solakon free?

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

### Is i free?

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

### Which has better reviews, Solakon or i?

Solakon and i are both rated 5.0 out of 5 on the App Store, from 7 and 3 ratings respectively.

### Do Solakon or i have ads?

Neither Solakon nor i shows ads.

### Which is updated more often, Solakon or i?

Solakon ships an update every 5 days, and i every 4 months. Most recently, Solakon was updated on October 30, 2026 and i on October 30, 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.*