# DANUBEFLATS vs solarkollektiv

The clearest difference is iOS requirement: DANUBEFLATS at 13.0 against solarkollektiv'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.

DANUBEFLATS ships an update every 4 months, solarkollektiv every 2 months. The most recent releases landed on October 25, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | DANUBEFLATS | solarkollektiv |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Size | 89 MB | 73 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Pocket House GmbH](https://appshunter.io/developer/1450647392) | [REGIOWERT ELEKTROTECHNIK GMBH](https://appshunter.io/developer/1815982608) |

## What reviewers say

### DANUBEFLATS

[App page](https://appshunter.io/ios/app/danubeflats/id6738173085)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### solarkollektiv

[App page](https://appshunter.io/ios/app/solarkollektiv/id6746266391)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is DANUBEFLATS free?

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

### Is solarkollektiv free?

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

### Do DANUBEFLATS or solarkollektiv have ads?

Neither DANUBEFLATS nor solarkollektiv shows ads.

### Which is updated more often, DANUBEFLATS or solarkollektiv?

DANUBEFLATS ships an update every 4 months, and solarkollektiv every 2 months. Most recently, DANUBEFLATS was updated on October 25, 2026 and solarkollektiv on September 9, 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.*